The universe was created from a single massive explosion would be considered a theory because it can't be tested directly,
Why are fossils important to developing a theory of evolution?
Suppose that a plant had chloroplasts that could carry out the Calvin cycle, but these chloroplasts could not carry out the light-dependent reactions. Explain why these chloroplasts could not carry out photosynthesis to produce sugars.
Plants with chloroplasts carrying out Calvin cycle but unable to carry out light-dependent reactions could not carry out photosynthesis because to produce sugars, the light dependent reactions are essential in order to produce ATP and NADPH.
Calvin cycle is the light-independent reaction that is performed with the help of products from light dependent reactions. The Calvin cycle is accomplished in three steps: Carbon fixation, reduction and regeneration. The product of Calvin cycle is triose phosphate which is further used in glucose production.
Light dependent reactions are those that involved in the production of ATP and NADPH through a series of electron transporters. These ATP and NADPH are therefore used for synthesis of glucose.
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Which action would most likely lead scientists to change or improve an existing scientific theory about evolution?
Answer: Gathering new evidence using new technologies or procedures most likely will lead scientists to change or improve an existing scientific theory (Option D).
Explanation:
Which of the following does not have high potential energy? atpnitrogenglucoseconcentration gradientelectrical/ion gradient
The potential energy is the energy that depends upon relative position or various part of a system and the potential charge that a molecule have. The molecules of ATP, nitrogen, and glucose have high potential energy, as well as the ion gradient in a cell membrane, however the concentration gradient does not require neregy input, since the energy stored in it is the one used to balance the concentrations.
the earth orbits the sun true or false
Earth rotate in an orbit around the sun. It takes 365 days, 6 hours, 9 minutes for the earth to complete its revolution around the sun. Its directional rotation to the sun is counterclockwise. Leap year is scheduled on the 6 hours, 9 minutes which is an additional 24 hour every fourth year.
Answer - True
Fungi exist as single cells or as branching networks of multicellular filamentswith a very large surface area. What is the function of the filaments?A. ReproductionB. Nutrient absorptionC. Energy productionD. Photosynthesis
Micelium, which is formed by a number of filaments, has the main function of penetrating the substrate in search of food and nutrient. Moreover, it can suffer some modifications to form reproductive structures.
The correct option is: B. Nutrient absorption.
Question: Use the image to explain how ATP provides energy to your body
The image shows the process of photosynthesis where conversion of light energy to chemical energy took place by cellular respiration thereby releasing sugar in the form of glucose to provide food to plants and other organisms. ATP is produced by glycolysis and electron transport chain which serves as the energy currency of a cell which are synthesized by the mitochondria.
The image shows a representation of the carbon cycle that could also be related to our human body as well. From the image, it shows that sugar are formed by plants using carbon dioxide and the energy from the sun which can develop for their own nutrients. The process of photosynthesis where conversion of light energy to chemical energy took place by cellular respiration thereby releasing sugar in the form of glucose to provide food to plants and other organisms. When animals, even human beings consumes sugar and they can break them in ATP, which is a molecule that contains energy, can be used in multiple processes. ATP is produced by glycolysis and electron transport chain which serves as the energy currency of a cell which are synthesized by the mitochondria. The chlorophyll entagle the energy from the sun and modify it into chemical energy in the form of ATP.
True or FalseDarwin theorized that the forces seen today in the biological world such as reproduction, inheritance, and competition gradually produce the whole diversity of life on Earth.
The correct answer is FALSE. Although Darwin, indeed recognized reproduction and competition as important drivers of global biodiversity, he did not included the role of inheritance. Rather, he emphasized the role of competition and natural selection.
Sickled red blood cell normal red blood cellSickled red blood cells carry less oxygen than normal red blood cells. What does this demonstrate about mutations in the DNA thatcodes for hemoglobin?OA. These mutations can change the structure and function of hemoglobin.OB. These mutations decrease the amount of oxygen available to bind with hemoglobin.OC. These mutations are unable to affect the structure and function of hemoglobin.OD. These mutations can change the structure of oxygen so that it does not bind to hemoglobin.
The answer is the letter A. These mutations can change the structure and function of hemoglobin.
The effect of the mutation in the hemoglobin is it altered its structure that makes
The lymphatic system contains a network of vessels that transport fluids very similar to what other body system?Skeletal systemCardivoascular systemMuscular systemNervous system
Lymphatic system
The lymphatic system is made up of vessels and lymph nodes and its main function is the transport and circulation of fluids that are present in the body's tissues.
Thus, we can say that the lymphatic system resembles the cardiovascular system because the cardiovascular system is also composed of vessels and its main function is to circulate blood in the body.
So "cardiovascular system" is the answer.
What’s this please help
Answer: The Ocean
Explanation: The ocean contains a vast amount reservoir of carbon this is because of the organisms in the ocean that take carbon dioxide.
In one to two sentences, explain why there is more concern for severe storms in low-pressure systems.
The low-pressure areas have a relatively thin atmosphere and that causes air to rise fast to make clouds. Sometimes, a storm is formed due to air can't move downward towards the surface and instead, it converges. Severe storms are mostly observed in low-pressure areas because it has perfect conditions: the air is thin, high wind speeds, and rapid spiral movement. Warm ocean waters are catalysts for these storms.
I need help to draw a phylogen tree .Thank you
Ratite is a group of flightless birds that evolved from a single flightless ancestor.
What do you think would happen to the population of peppered moths once coal use decreased and the trees no longer were covered in soot?
Answer:they would turn back white
Explanation:once the soot is gone, they return to natural colour again due to camouflage
Tabulate in detail the comparison among Simple Diffusion, Facilitated Diffusion, and Active Transport across a cell membrane.
The cell has several types of membrane transport alternatives, being the simple diffusion, facilitated diffusion, and active transport one of the options for the cell to exchange molecules between internal and external environment.
The types of cell transport:
1 - Simple Diffusion: is a process that does not need energy (passive), used to transport small and nonpolar molecules from a region of higher concentration into a region of lower concentration (in the gradient concentration direction);
2 - Facilitated Diffusion: is a process that does not need energy (passive), used to transport larger ions and polar molecules with the help of carrier proteins or pore proteins (transport proteins);
3 - Active Transport: There is two types of active transport, primary active transport is used for molecules moving against their gradient coupled to the hydrolysis of ATP, and secondary active transport is for molecules going with more molecules against their gradient. It is a process that needs energy (active) to happen, going always against the gradient of concentration of the cell.
What effects will result in an individual with this karyotype?
Answer: Trisomy 21
Expanation: tTe most common chromosomal anomaly in humans, affecting about 5,000 babies born each year and more than 350,000 people in the United States. Also known as Down syndrome, trisomy 21 is a genetic condition caused by an extra chromosome.
Which type of sedimentary rock is pictured here?
13. In order to bond a monosaccharide to an existing chain, what molecule must be removed?
14. If a chain of 5 monosaccharides are to be linked together, how many water molecules must be removed?
15. How does the number of glycosidic linkages compare to the number of water molecules produced?
When two monosaccharides undergo a condensation process with the removal of one molecule of water from the functional groups, a disaccharide—a kind of carbohydrate—is created.
What has to be taken out of some of the monosaccharides before they may be chemically joined?Dehydration synthesis is a chemical process that converts monosaccharide molecules into poly- or disaccharide molecules. The monosaccharide molecules are united to produce the disaccharide or polysaccharide in such a process, which removes the water-containing components.
A glycosidic bond, a sort of condensation process, is formed when two monosaccharides come together. A water molecule is lost when the carbon of one sugar (often the carbon in position 1) interacts with the hydroxyl moiety of another sugar molecule.
When two monosaccharides are combined and a water molecule is eliminated, disaccharides are created.
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Some adult chordates do not exhibit the characteristic features of the phylum Chordata. What is the likely reason?
A likely reason why some adult chordates do not exhibit all the characteristic features of the phylum Chordata, is that some features are present during development but are subsequently lost or become another structure. (option 2)
the place where a river begins is called?
The place where a river begins is called source or headwaters, being the rivers the construction from water that comes of smaller streams that join together forming tributaries.
The Meselson-Stahl experiment demonstrated that DNA replication is semiconservative. In the figure, semiconservative replication is illustrated byA) AB) BC) A mix of these methods, depending on the cell typeD) C
DNA replication is called semiconservative because, in each copy that is made of the DNA, one of the strands comes from the template. This means that all copies of DNA retain one strand of the original DNA (semiconservative). Therefore, the image that best illustrates DNA replication is A.
What enzyme unwinds or unzips the
parent strand in DNA?
Answer:
Helicase
Explanation:
To begin DNA replication, unwinding enzymes called DNA helicases cause the two parent DNA strands to unwind and separate from one another.
Which of the following statements about the electron transport chain is true?
Group of answer choices
A) It is driven by ATP hydrolysis.
B) It includes a series of hydrolysis reactions associated with mitochondrial membranes.
C) It consists of a series of redox reactions
D) It occurs in the cytoplasm of both prokaryotic and eukaryotic cells.
Answer: I'm im 99% sure it's C "It consists of a series of redox reactions" if it's right do you mind giving a brainliest?
which mutation will cause translation to stop
nonsense mutation will cause translation to stop.
What causes DNA translation to halt?Cut off Codon
In DNA or messenger RNA (mRNA), a stop codon is a trinucleotide sequence of three nucleotides that instructs the cell to stop production of proteins. The number of trinucleotide codons is 64. 3 stop codons are present, and 61 define amino acids (i.e., UAA, UAG and UGA).
A DNA change that causes a protein to cease or end its translation earlier than predicted is known as a nonsense mutation or its synonym, a stop mutation. This is a frequent type of mutation that affects both humans and other animals and results in the expression of a protein that is either truncated or ineffective.
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Which of the following is/are not a condition affecting the Hardy-Weinberg equilibrium?Recessive traitsGenetic driftMutationNatural selection
Hardy-Weinberg equilibrium tells that the variation in genetics present in a certain population will remain constant in the absence of any disturbing events from one generation to another. Conditions that are not affecting this principle are natural selection, genetic drift, and mutation. These forces if present in a population will affect the equilibrium which is being maintained by this principle. and will eventually lead to an evolution. Natural selection is present when the organism adapt and change. Genetic drift is present when there are variants forms of genes. Mutation is present when there are permanent changes in the DNA sequence. These processes should be absent in order to mantain the principle of Hardy-Weinberg equilibrium.
Answer - recessive traits
The Hoover dam across the Colorado river contains a large power plant that generates electricity by what type of power?A. hydro-powerB. Solar power C. nuclear power D. geothermal power
The correct answer is A hydro-power energy.
This type of energy is a renewable energy. A hydropower plant is located always in a river because they are used to transform the kinetic energy of the water and or its gravitational potential energy into power, generating electricity. This process occurs in a turbine.
Given: dna codon chart, DNA sequence.DNA sequence given is: 3’ TAC CCC GAT AAA ATA CAT TTA GGA TCG CGA TGG TAT 5’How do you transcribe the DNA sequence into mRNA?And can you underline or highlight on the sequence the codons for Proline and Tyrosineand label which is which? Thanks
Step 1:
The process of DNA transcription occurs from the 5' to 3' being the DNA sequence in the correct order for transcription as follow:
5' TAT GGT AGC GCT AGG ATT TAC ATA AAA TAG CCC CAT 3'
Step 2:
Resulting in the mRNA:
5' AUA CCA UCG CGA UCC UAA AUG UAU UUU AUC GGG GUA 3'
- Being the nucleotide thymine replaced by uracil in the formation of the RNA strand.
Step 3:
The codons sequence that form proline and tyrosine are:
Proline: CCA;
Tyrosine: UAU.
Distinguish between the lytic and lysogenic cycles of viruses. (1 point)O The viral genome incorporates into the host genome during the lysogenic cycle.O The viral genome is only injected into the cell during the lytic cycle.O The lysogenic cycle involves newly replicated virus bursting from the cell.O The lytic cycle involves the merging together of the viral and host genomes.Study guide
The main difference between the lytic and the lysogenic cicles is that in the lysogenic cicle, the viral genome incorporates into the host genome (option 1).
Lytic cycle is the cycle in which reproduction of virus using a host cell in order to produce more viruses through the use of host cells. Lysogenic is the one in which there is incorporation of genome in the host cell.
What is the genome of the virus made up of ?It is either made up of DNA,RNA and viral proteins with the use of certain enzymes inside the genome as well.
The viral genome incorporates into the host genome during the lysogenic cycle. This happens in the case of lysogenic cycle during which the genomic material gets intervened inside the host cell.
In the lytic cycles the viral DNA spreads via the use of host cells and on
It is either made up of DNA,RNA and viral proteins with the use of certain enzymes inside the genome as well.
the other side the lysogenic bacteria or viruses are using the infusion of genetic material inside the host cells.
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Food Web AssignmentDirections illustrate the flow of energy within the aquatic system below by completing each direction below.SquidBlue WhaleSealKrillPenguinZooplankton1.) Draw in 8 arrows to show how the energy moves to create a food web. You may have to do a little research to help youmake all the correct connections!2.) Where would phytoplankton and the Sun belong in this food web? Draw it as well as an arrow connecting each one accurately.3.) How would bacteria nit into this food web? Describe how you would draw it in. 4.) Classify each of the 7 organisms in the aquatic food web, as well as bacteria, as a producer, consumer or decomposer by writing each into the correct category below. • Producer - • Consumer - • Decomposer -
For the first and second question we have:
Squid eats: Krill
Blue whale eats: Krill
Seal eats: Krill, Squid, Penguins (Only leopard seals)
Krill eats: Zooplankton (and phytoplankton)
Penguin eats: Krill, squids
Zooplankton eats: no one (in the picture, but they eat phytoplankton)
For the third question: Bacteria enter as decomposers in the food web.
Finally, for the fourth question we have:
Producers: Phytoplankton
Consumers: squids, blue whale, seal, krill, penguin and zooplankton
Decomposer: Bacteria
Which of the following does an ecologist study?
OA. Interactions between living organisms and the natural
environment
B. Historical changes in forms of government and economic
systems
C. The effects of smaller factories on internal trade
D. The impact of technology on communications and human
relationships
Answer:
The answer is A
Explanation:
An ecologist studies the relationship between living things and their habitats.
