Immobility of amoeba, may be caused by the absence of actin.
The pseudopodial movement is typically used by the Amoeba to move in the direction of food molecules. The pseudopodia surrounds the food molecule from both sides before eventually swallowing it whole. As a result, pseudopodia are utilized in movement and as a method for capturing prey or obtaining the necessary nutrients.
Because actin is the primary protein, actin polymers push their membrane as they grow, resulting in the formation of the pseudopod. The pseudopodium then uses its adhesion proteins (integrins, for example) to stick to a surface and pull the cell's body forward by contracting an actin-myosin complex in the pseudopod.
Researchers observe that an amoeba appears incapable of forming pseudopods for movement. They conclude that its immobility may be caused by the absence of the protein
a. collagen
b. kinesin
c. tubulin
d. dynein
e. actin
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suppose you examine a population of randomly-mating organisms and find that its actual genotype frequencies are not those predicted by hardy-weinberg equilibrium. what conclusion should you draw?
When the five requirements listed below are met, the Hardy Weinberg equilibrium asserts that perhaps the allelic frequency of organisms remains constant from generation to generation.The five conditions are.:
1) Large population size
2) Random mating
3) Sexual reproduction is necessary
4) No migration
5) No evolution (no natural selection)
If any of these five conditions is violated, Hardy Weinberg equilibrium cannot be used to forecast genotype frequencies.
Option-d evolutionhas occurred is the right answer since it violates the Hardy Weinberg equilibrium criteria.
What is Hardy-Weinberg principle?
The Hardy-Weinberg principle, also known as the Hardy-Weinberg equilibrium, model, theorem, or law in population genetics, holds that in the absence of additional evolutionary factors, allele and genotype frequencies in a population would remain constant from generation to generation.
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What contribution did Thompson add to the understanding of the atom?
a
Discovered that electrons orbit the nucleus. B
Discovered the nucleus of the atom using the Gold Foil experiment
c
Reasoned that atoms are indivisible. D
Discovered a subatomic particle (protons or, neutrons or , electrons)
The contribution that thompson did add to the understanding of the atom was that he Discovered that electrons orbit the nucleus.That is option A.
What is an atom?An atom is defined as the smallest indivisible part of an element that is made up of central nucleus with electrons that revolves round about it.
There are various scientist that contributed towards the study and understanding of atoms and they include the following:
Democritus, John Dalton, J.J. Thomson, Ernest Rutherford, Niels Bohr, Robert Millikan and Irwin Schrodinger.Joseph John Thompson or J.J. Thomson in 1879 proposed the existence of electrons that revolves round the nucleus of an atom.
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. why do some microbiologists prefer to open and close quickly the culture tube instead of flaming its mouth prior and after transferring bacteria to or from it? multiple choice 3 because it reduces the amount of heat entering the tube because it is more likely to prevent contamination because it prevents spills more effectively because it eliminates the necessity of an open flame
Some microbiologists prefer to open and close quickly the culture tube instead of flaming its mouth prior and after transferring bacteria to or from it because it prevents spills more effectively because it eliminates the necessity of an open flame
What are the risks associated with utilising direct burning to control bacteria?Contamination danger is increased. Not all contagious components will be promptly deactivated and destroyed when an item is exposed to open flames.
Flaming the Test Tube's Mouth: A convection current is produced when the mouth of a tube is passed past the flame of a Bunsen burner, forcing air out of the tube. By doing this, pollutants from the air are kept out of the tube.
Flaming is used to warm the bottle's opening and produce air convection currents that move away from the opening rather than sterilising it (i.e., updraft). The heated, rising air helps keep contaminants and other impurities out of the bottle.
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1. What 2 events in nature can hinder the process of carbohydrate production? Explain your answer. Use the sentence frame: “___ can hinder carbohydrate production because ____.”
The answers include the following below:
Stormy weather can hinder carbohydrate production because of inadequate sunlight.Low temperature can hinder carbohydrate production because of low heat.What is Carbohydrate?This is referred to as a compound which helps in the provision of energy when it is broken down by enzymes and is formed during photosynthesis through the use of water and carbondioxide as the reactants.
Stormy weather and low temperature can hinder carbohydrate production because of inadequate sunlight. Photosynthetic reaction by plants, requires the use of adequate sunlight as it is converted into this compound thereby making it the correct choice.
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In pea plants, colored seeds coats are dominant to white seed coats. A heterozygous plant is crossed with a white seed coat plant. What is the chance of homozygous dominant offspring? (5 pts)
Genotype: Phenotype:
(Create Punnett square pls)
If colored seed coats are dominant to white seed coats, and a cross between a heterozygous plant Cc and a cc white seed coat plant is produced, then the chance of obtaining a homozygous dominant offspring is equal to zero percent (0%).
What is a genetic cross?A genetic cross is a phenomenon when two individuals cross to produce offspring, which may be represented by a Punnet square.
In this case, the Punnet square is equal to:
C c
c Cc cc
c cc cc
Therefore, with this data, we can see that none of the offspring from this cross is dominant CC for the trait and they can be colored (Cc 25%) or white (cc 75%).
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The process of transcription begins when
Answer: Hope this helps have a good day
Explanation:
Transcription begins when RNA polymerase binds to a promoter sequence near the beginning of a gene (directly or through helper proteins). RNA polymerase uses one of the DNA strands (the template strand) as a template to make a new, complementary RNA molecule.
Transcription occurs in the three steps—initiation, elongation, and termination—all shown here. Step 1: Initiation. Initiation is the beginning of transcription. ... Step 2: Elongation. ... Step 3: Termination.
RNA polymerases begin transcription at DNA sequences called promoters. RNA polymerases end transcription at sequences called terminators. Transcription is the process by which the information in a strand of DNA is copied into a new molecule of messenger RNA (mRNA). DNA safely and stably stores genetic material in the nuclei of cells as a reference, or template
how does bpg decrease the affinity of hemoglobin for oxygen? i. bpg binding to hemoglobin stabilizes the deoxy conformation. ii. bpg binding to hemoglobin stabilizes the oxy conformation. iii. none of the other options. iv. bpg blocks the oxygen binding sites directly. v. bpg reacts with oxygen to produce bicarbonate.
BPG binding to hemoglobin stabilizes the deoxy conformation bpg decrease the affinity of hemoglobin for oxygen.
The correct option is (i).
What is the main cause of low hemoglobin?Low hemoglobin is most frequently caused by a diet that is inadequate in iron. Low hemoglobin levels can cause headaches, exhaustion, and pale complexion. Surgery, iron therapy, and iron supplementation are all options for treating low hemoglobin. It's also crucial to include more foods high in iron in your diet.
What level of hemoglobin is concerning?The cutoff point for a high hemoglobin count varies widely between medical specialties. Hemoglobin overload is often characterized as having more than 15.4 g/dL for women and more than 16.6 g/dL for men.
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Photosynthesis and cellularrespiration
Answer:
Both are processes within the cell which make chemical energy available for life. Photosynthesis transforms light energy into chemical energy stored in glucose, and cellular respiration releases the energy from glucose to build ATP, which does the work of life.
Explanation:
Photosynthesis converts carbon dioxide and water into oxygen and glucose. Glucose is used as food by the plant and oxygen is a by-product. Cellular respiration converts oxygen and glucose into water and carbon dioxide. Water and carbon dioxide are by- products and ATP is energy that is transformed from the process.
hope this help
sympathetic stimulation causes multiple choice mesangial cells to release angiotensin, which ultimately leads to granular cell relaxation. mesangial cells to release angiotensin, which ultimately leads to granular cell contraction. granular cells to release renin, which ultimately leads to mesangial cell contraction. inhibited release of erythropoietin and contraction of granular and mesangial cells. granular cells to release renin, which ultimately leads to mesangial cell relaxation.
Sympathetic stimulation causes granular cells to release renin, which ultimately leads to mesangial cell contraction and is denoted as option C.
What is Sympathetic stimulation?This is referred to as the process in which the sympathetic nervous system is stimulated so as to enable certain types of activities such as heart and digestive rate to be adequately performed by the body for its survival.
In the digestive system, its stimulation results in granular cells releasing renin, which ultimately leads to mesangial cell contraction. This is responsible for the coagulation which occurs in the stomach.
Digestion of the milk is enhanced in this process especilly in young children and is therefore the reason why option C was chosen as the most appropriate choice.
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How can you tell from looking at a nuclear reaction that fusion has taken place? (1 point)
O The total number of protons and neutrons will increase.
O The nucleus with the largest mass will be on the left side of the equation.
The nucleus with the largest mass number will be on the right side of the
equation.
O The total number of protons and neutrons will remain constant.
You can tell from looking at a nuclear reaction that fusion has taken place by an increase in the total number of protons and neutrons which is denoted as option A.
What is Nuclear fusion?
This is referred to as a form of reaction which involves the fusion of two or more light nuclei to form a heavier nucleus.
We are ware that the nucleus comprises of subatomic particles such as proton and neutron which therefore means that a heavier nucleus being formed will lead to an increase in the total number of protons and neutrons hence option A was chosen.
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the ara operon is an inducible operon that controls the production of the sugar arabinose. when arabinose is present in a bacterium it binds to the protein arac, and the complex binds to the initiator site to promote transcription. in this scenario, arac is a(n) and arabinose is a(n) .
The ara operon is an inducible operon that controls the production of the sugar arabinose. When arabinose is present in a bacterium it binds to the protein AraC, and the complex binds to the initiator site to promote transcription. In this scenario, AraC is a(n) activator.
The process of transcription uses the DNA found in the nuceloids of bacteria cells to create messenger RNA. However, the generation of these mRNA is dependent on the intracellular state of the bacterium, such as whether or not the protein encoded by the segment is required.
Only when there is no arabinose sugar present in the cell can AraC function as a repressor in this particular bacteria. AraC will function as an activator in the aforementioned context since sugar arabinose is present.
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which of the following statements among a - d is false? a. an antimicrobial agent exhibiting bacteriostatic activity should always show a decrease in viable count. b. in terms of killing effect, ionizing radiation like gamma rays is generally more effective than non-ionizing radiation such as uv light. c. implementing cold temperatures for food preservation has a bacteriostatic effect rather than a bacteriocidal effect. d. disinfection is not a sterilization process. e. none of a - d is false; all are true
Among the following statements, option e is correct that is all the given statements are true.
In option a, bacteriostatic means a state of preventing the growth of bacteria, thus an antimicrobial agent persisting in this quality will decrease the growth of bacteria which is the decreased viable count. In option b, Gamma radiations are ionizing radiations but UV- radiations are non-ionizing radiation thus, gamma radiations are more harmful than UV- radiation.
In option c, Food preservation at a cold temperature gives a dormant state to bacteria thus the growth of bacteria is bacteriostatic, and not bacteriocidal. In option d, Disinfection is different from sterilization, they both are decontamination process where disinfection is the process of killing and sterilization is the process of killing.
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which correctly describes the relationship between photosynthesis and respiration? group of answer choices photosynthesis only occurs in plants and respiration only occurs in animals. atp molecules are produced in photosynthesis and used up in respiration. respiration stores energy in energy-rich, carbon-based molecules, while photosynthesis releases energy from energy-rich carbon-based molecules. photosynthesis stores energy in energy-rich, carbon-based molecules, while respiration releases energy from energy-rich carbon-based molecules. both photosynthesis and respiration consume more atp than they produce.
Water and carbon dioxide are changed into oxygen and glucose during photosynthesis. The plant consumes glucose and produces oxygen as a byproduct. Oxygen and glucose are transformed into water and carbon dioxide during cellular respiration.
By-products of the process include carbon dioxide, water, and ATP, which is turned into energy. Which of the following best describes how respiration and photosynthesis interact?
The response is (B) While respiration releases energy, photosynthesis stores it in sophisticated organic molecules.
Cellular respiration transforms light energy into heat energy, whereas photosynthesis transforms light energy into chemical energy.
Through a sequence of biological events, both photosynthesis and respiration entail the transformation of energy from one form to another. ATP is used and produced in both processes in membrane-based reactions, and are under the control of enzymes.
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What is the direct effect of oxygen to sea otters?
It would be challenging to duplicate the precise circumstances of the chemical release elsewhere.
How does temperature affect sea otters directly?Sea otters decrease heat loss by floating on their backs with their feet out of the water when the water is too chilly. The sea otter extends its feet out underwater to increase its surface area while it is seeking to shed heat. Sea otters frequently extend their feet out or tuck them up to conserve body heat.
River otters take oxygen from the air, just like other animals do. In the event that they are submerged, they surface to breathe. In the winter, when the water is frozen into ice, they create holes so they may rise to the surface to breathe.
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When stimulation occurs too close together to allow for any muscle relaxation, what occurs to the muscular force with each stimulation?.
Incomplete Tetanus occurs to the muscular force with each stimulation.
What is an example of a stimulation?External or internal stimuli can be used. That manner a medicine impacts your body is an example of an external stimulus. Your vital signs altering as a result of a change in your biology is an instance of an internal stimulus.
What makes stimulation so important ?When considered as a whole, sensory input is essential for creating neural connections that support appropriate brain growth. The youngster benefits from this stimulation by learning about the outside world, communicating, and developing relationships with others.
What kinds of stimulation are there?Visible (seeing) Auditory (hearing)Tactile (touching) Gustatory (taste)Olfactory (smelling)To know more about Stimulation visit:
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ANSWER ALL ASAP
FOR BRAINLIEST!!!
Use this for reference: In this lab, we will test the catalase enzyme found in beef liver tissue. First, we will observe the chemical reaction of catalase and hydrogen peroxide with the liver enzyme at room temperature. This is as close as we can get to "normal" temperature conditions for this enzyme.
Then, we will test the enzyme function after it has been cooled in the freezer or heated in boiling water. As we conduct the experiment, pay attention to the steps taken and be thinking about factors that should be constants in this lab
The term "independent variable" means precisely what it sounds like. It is a variable that is independent of the other factors you are attempting to assess.
What is independent and Dependent variable?Dependent variables are so named because their values are explored in an experiment under the assumption or requirement that they are dependent, by some law or rule, on the values of other variables.The group that does not get the new medication being investigated in a clinical trial. This group is compared to the group that receives the new treatment to see if the new treatment is effective.Assume you want to put a new ADHD medicine to the test. One group would be given the new medication, while the other would be given a tablet that looked precisely like the one given to the others, but it would be a placebo. The control group would be the group that receives the placebo. A control group is the "untreated" group with which an experimental group (or treatment group) is contrasted in experimental designs. It is made up of research units that did not receive the treatment whose effect is being studied.To learn more about independent variable, refer to:
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Triglycerides are the most common lipid found in food and in the body; they consist of a ____________ backbone attached to three fatty acids.
Triglycerides are the most common lipid found in food and in the body, they consist of a glycerol backbone attached to three fatty acids.
Triglycerides are lipid compounds consisting of glycerol esterified with three fatty acid chains of varying lengths and compositions. Triglycerides are a type of fat found in the blood. When you eat, your body converts calories that it doesn't need to use immediately into triglycerides. Triglycerides are stored in fat cells.
The hormone then releases triglycerides for energy between meals. Triglycerides are the major components of body and vegetable fats in humans and other vertebrates. They are also present in the blood, allowing the bidirectional movement of fat and blood sugar from the liver, and are the major constituents of human skin oils. Triglycerides or triacylglycerols are glycerol molecules with three fatty acids attached. It consists of Pendant fatty acids that can be saturated and trans.
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substrates are held in the active site of an enzyme by:the matching shape of the allosteric site.the lowering of the activation energy.hydrogen and ionic bonds.the action of coenzymes and cofactors.
Substrates are held in the active site of an enzyme by hydrogen and ionic bonds.
What is ionic and hydrogen bonds?Ionic bonds are attracted by electrostatic forces, whereas hydrogen bonds are intermolecular forces. Ionic bonding occurs between permanent anions and cations, whereas hydrogen bonds occur between partial positive and partial negative charges. This is the main distinction between the two types of bonds.
In that they are created by the attraction of atoms with opposing polarity, hydrogen bonds are comparable to ionic bonds in this regard. They lack the strength of full or complete charges, however, as they are formed by the interplay of partial charges.
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This organelle resembles the circulatory system because it carries nutrients to other areas of the cell. What is it?
Answer:
The endoplasmic reticulum
Explanation:
This is because the endoplasmic reticulum is a system of tubes surrounding the nucleus, which allows it to diffuse nutrients within the cytoplasm
If a rock contains ten different kinds of fossils, which of the following must be true?
answer: All of the organisms had to be alive when the rock was deposited
The statement regarding a rock with ten distinct types of fossils that is true: 'All of the organisms must have been alive at the time of rock deposition'.
The question is incomplete. The complete question is:-
If a rock consists of ten distinct types of fossils, which of the following statements regarding the rock might be true?
Hints:-
'All the ten organisms witnessed evolution at the similar time'.
'All the ten organisms had gone extinct at the similar period of time'.
'All of the fossils are helpful in order to constrain the relative age'.
'All of the organisms must have been alive at the time of rock deposition'.
'These organisms relate to the minimum age of the rock'.
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you should of underline leaf becase that was the anser
Answer:
what?
Explanation:
How do i transform a table into a histogram
Answer:
Sep 21, 2020
7 key moments in this video
From 00:40
Decide on bin limits
From 01:56
Entering Bin Limits
From 02:21
Generate the frequency table
From 03:13
Review the frequency table
From 05:27
Add Axes titles
From 05:49
How to make the bars in the chart thick
Explanation:
unstable plaque, a condition of atherosclerotic heart disease, occurs in unstable angina and myocardial infarction. unstable plaque can rupture, causing platelet aggregation and thrombus formation. what are the major determinants of the vulnerability of plaque to rupture? select all that apply.
Due to ongoing inflammation, collagen degradation (linked to macrophages), lipid buildup (core development), weakening of the cap, and delayed healing and repair (smc-related).
What causes aggregation of the platelets?Collagen, ristocetin, arachidonic acid, adenosine 5′-diphosphate, adrenaline, and thrombin are examples of substances that can excite platelets and subsequently cause aggregation. A diagnostic pattern for various abnormalities of platelet function is provided by the response to these aggregating drugs (also referred to as agonists).
Which medication stops platelet aggregation?The most popular antiplatelet medication, aspirin, alters the ratio of prostacyclin to thromboxane, which prevents platelet aggregation (that promotes aggregation). In high-risk patients, aspirin effectively lowers the risk of cardiovascular events. Aspirin's primary known effect on hemostasis is to suppress platelet thromboxane A2 production, which reduces platelet aggregation.
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13. In which sphere does carbon build up for millions of years in the form of coal?
a. Atmosphere
b. Mega sphere
c. Hydrosphere
d. Geosphere
Answer:
d. Geosphere
the carbon enters the geosphere (Earth) through the biosphere by means of decaying dead organic plant and animal materials undergoing fossilization there by becoming incorporated in organic rich oil and gas (fossil fuels)
What is the description/function of lysosomes and vacuoles?
Answer:
Lysosomes are the waste cells. They get rid of old things. Vacuoles stores things for later use, like water and other important tings.
Hope this was helpful
Carrying capacity how with the growth rate of the population in area a compare with the growth rate of the population in area b? think about whether a population grows at carrying capacity
Answer: As the population gets larger and approaches the environment's carrying capacity, resources become more scarce and the growth rate slows.
Explanation:
Imagine there are zebras elephants and meadow argus butterflies in the local ecosystem. which biome are they most likely in? tundra tropical rainforest grassland temperate forest
Answer: the answer is grassland
cause Plains zebras live in savannas and temperate grasslands (plains). Savannas are large areas covered with grass and other plants, as well as some trees, while plains have grass and few to no trees at all. As you can imagine, plains zebras eat mostly grass and so are elephants are grassland animals too Due to their habitat, savanna elephants are often found grazing on grasses, but they also browse on a wide variety of plants and fruits. This selection varies depending on the time of year; during the rainy season the elephant will feed more on grass than during the dry season. hops this helps .
Explanation:
which of the macromolecules tested in this exercise (proteins, lipids, nucleic acids) were formed by dehydration reactions? explain your answer by describing the structure of each macromolecule.
Large polymers are created during dehydration synthesis, which are typically referred to as biological macromolecules. These compounds include proteins, lipids, carbohydrates, and nucleic acids.
As a result, the dehydration reaction is responsible for the formation of protein, lipid, and nucleic acids.
1. Protein structure
Amino acid polymers form proteins. There are four different types of proteins, based on structure.The amino acid sequence of a protein is represented by its primary structure, which is a linear chain.The backbone (main chain) atoms of a polypeptide are arranged locally in space to form the protein's secondary structure.A polypeptide chain's whole three-dimensional structure is referred to as a protein's tertiary structure.The protein's quaternary structure, which is a three-dimensional arrangement of the subunits of a multi-subunit protein.2. Lipid structure is a crucial element of the cell membrane. The structure is mostly composed of a glycerol backbone, two hydrophobic fatty acid tails, and a hydrophilic phosphate group.
3. Nucleic acids' structure: Nucleotide polymers make up nucleic acids. Each nucleotide is made up of an aromatic base with a N-atom connected to a pentose sugar with five carbons, which is then joined to a phosphate group.
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Cellular respiration is a series of metabolic reactions in which the energy from organic molecules, such as glucose, is released and used to synthesize.
Cellular respiration is a series of metabolic reactions in which the energy from organic molecules, such as glucose, is released and used to synthesize energy in the form of ATP.
The chemical reaction that converts glucose and oxygen into water, carbon dioxide, and ATP energy is known as cellular respiration. Oxygen and glucose are the reactants in the process, and the products are water, carbon dioxide, and energy (ATP). Therefore, we can say that cellular respiration is a series of metabolic reactions that is used to synthesize ATP.
The controlled release of energy from organic substances during cell respiration results in the production of ATP. ATP, adenosine triphosphate, is required in every kind of bodily reactions and to conduct various body functions. Mitochondria is the primary site of ATP synthesis in a cell. These organelles consume glucose to convert it into energy molecules and other by-products.
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ANSWET IF YOU TRULLY KNOW THIS
When the temperature rises, atoms and molecules move faster and collide, creating thermal energy (also known as heat energy). Thermal energy is the energy that results from the heated substance's temperature.
What is thermal energy?The atoms and molecules that make up matter are always in motion. The increase in temperature caused by heating a substance causes these particles to accelerate and collide.
The energy that arises from a heated substance is referred to as thermal energy. The more the substance's thermal energy and the more its particles travel at higher temperatures.
When the temperature rises, atoms and molecules move faster and collide, creating thermal energy (also known as heat energy). Thermal energy is the energy that results from the heated substance's temperature.
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