Answer:
34
Explanation:
the wild type of the nonmutant to get it done before the end of the day
Sally won the 200 m race in 39 seconds. How fast was she going?
speed = distance/ time
Sally's speed = 200m / 39 s = 5.13 ms^-1
Which could best be used to explain why bacteria can infect a person very quickly?.
Answer:
binary fission
Explanation:
Hope this helps...
Answer:
Binary fission
Explanation:
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Why is the location of zygote formation an adaptation to living on land.
Answer: why is the location of zygote formation an adaptation to life on land? archegonium- only evolved in gymnosperms, ferns, angiosperms not in moss.
Explanation: Hope This Helps!
From: Kenji
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The location of zygote formation an adaptation to living on land as protection and nourishment of the zygote becomes the prime aim of the parent organisms.
What is zygote?Zygote is the product of fertilization of two gametes. It is the first cell of an organism that divides and redivides to give rise to an entire organism. Thus, protection and nourishment of the zygote becomes the prime aim of the parent organisms.
The land plants usually retain their zygote within the female gametophyte, so that the zygote remains protected and can be nourished till it reaches a suitable condition to germinate. Retaining the zygote on the living gametophyte of land plants allows it to be nourished by the parent plant.
During the process of fertilization when two gametes fuses together in the process of sexual reproduction the product of fusion is known as zygote and it is responsible for the growth of the foetus.
Therefore, The location of zygote formation an adaptation to living on land as protection and nourishment of the zygote becomes the prime aim of the parent organisms.
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explain how the visible external features of a green dicotyledonous leaf aid the process of photosynthesis
Answer:
Plants take in carbon dioxide (CO2) from the air through the stomata, or pores in leaves.
Explanation:
Plants take in carbon dioxide (CO2) from the air through the stomata, or pores in leaves. Chlorophyll is found in the chloroplasts of cells and absorb the sunlight energy needed to change water and carbon dioxide into glucose.
Plants take in carbon dioxide (CO2) from the air through the stomata, or pores in leaves.
What are the characteristics of leaves?A complete leaf has: blade (blade), petiole or sheath, and a pair of leaf appendages called stipules at the base of the petiole. The sheath is the terminal portion of the petiole that embraces the stem and is generally well developed as in the case of Poaceae.
Plants take in carbon dioxide (CO2) from the air through the stomata, or pores in leaves.
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Which experimental approach would provide the most information about differences in membrane fluidity between two types of cells?.
Answer:I assume from your question that you are working with actual cells and that making the cell membranes de novo is not an option. Thus your only option (excluding extensive genetic modification of the cells) is pretty much to try to load the outer leaflet of the membrane with cholesterol or saturated, relatively long chain sphingolipids or phospholipids. (Well, easiest would be to decrease temperature, but because temperature affects pretty much every chemical and physical process, it would not tell you much about the specific role of fluidity.) Usually people use beta-cyclodextrins for cholesterol loading and gamma-cyclodextrins for phospho-/sphingolipid loading. In principle lipid exchange proteins would probably be better but with far, far higher cost.There are a few things to keep in mind. First, you need a good control to ensure that it is the change in membrane composition that affects the vesicle formation. Preferably you should also verify the fluidity of the cell membranes. This brings us to our second point to keep in mind. One problem with the cholesterol loading of the membranes is that cholesterol tends to uncouple the fluidity from the lipid chain order, resulting at higher mole fractions with saturated acyl chain rich membrane in fluid but ordered liquid-ordered phase. Otherwise the fluidity (i.e. how easily the lipids diffuse in the membrane) and chain order (i.e. how many kinks the chains tend to have) are more or less coupled, as kinks tend to push the lipid molecules farther apart. So, you will need preferably a few different types of reporter systems on fluidity, e.g. FRAP of a fluorescent lipid, Laurdan GP value, and, ideally some method for monitoring chain order, but this is very hard to do in cells that have very strong background fluorescence at the wavelengths of good chain order reporters like DPH-PC. The third problem is that because of the coupling between the chain order and area occupied by chains the preferred shape of the lipid molecules shifts with temperature from the initial (for unstressed bilayers) cylindrical towards a cone (with the polar headgroup at the peak). In addition, because the cholesterol has a very small headgroup, the increasing mole fraction of cholesterol causes similar effect. Occasionally this is referred to as HII propensity, because an easy way to quantify the effect is to look at the temperature where the system undergoes a phase transition from a (bilayer) L-alpha phase to cylindrical HII phase. If this happens on one leaflet only and if there is nonuniform concentration of the components, it tends to favour invagination and budding of the vesicles. This is something that is pretty much guaranteed to affect the vesicle budding process. Firstly, by reducing the headgroup area and inducing clustering by cleaving sphingomyelin with sphingomyelinase into ceramide it is possible to induce the invagination and vesiculation of the ceramide rich domains in model membranes in the absence of any other protein than sphingomyelinase (see the papers by Holopainen and Kinnunen, Vectorial Budding etc. in Biophys. J., and by Nurminen, Holopainen, and Kinnunen in J. Am. Chem. Soc.). In addition, it affects the energetics of the fusion/fission stalk, I think you can find papers on this by Kozlov in Biophys. J. The fourth problem is that the changes in the composition tend to affect the bending rigidity of the membrane that of course affects the energetics of the membrane bending processes like invagination and vesiculation.It is probably easy to see that successful, significant modification of the membrane composition affects the vesicle formation, but it is so complex to try to isolate the effect of fluidity of the vesicle formation that I doubt it can be done convincingly in live cells, at the very least in would need to involve numerous modifications while using sophisticated systems to record their effects on the properties of the membranes, including microdomain formation. Most likely it would require experiments using a full, reconstituted vesicle budding machinery with giant vesicles and accompanied by coarse-grained simulations to isolate the various effects of the modifications. So, to summarize, quick and dirty experiments with cholesterol loading can be done, but they do not tell you much about what property it was that caused the effect observed.
Explanation:
Study the timeline. A timeline. 4. 5 billion years ago, Earth is formed. 4. 3 billion years ago, Earliest water. 4. 1 billion years ago, Single celled life. 3. 5 billion years ago, Earliest oxygen and photosynthesis. 2. 5 billion years ago, Complex single celled life. 1. 5 billion years ago, Multi cellular life. 500 million years ago, Land life. 300 million years ago, Dinosaurs. 200 million years ago, Mammals. 130 million years ago, Flowers. 5 million years ago, Humans. Based on the timeline, about how many years ago could the oldest mammalian organism have lived? 5 million years 200 million years 1. 5 billion years 4. 5 billion years.
Geological timeline is the chronological dating of the organisms and the geological happening in the orderly manner of the years and dates. The oldest mammals lived 200 million years ago.
What are the different species that arrived in the geological timelines?5 million years ago humans arrived, 200 million years ago first mammal organism, 1.5 billion years ago complex single-celled organisms and 4.5 billion years ago Earth was formed.
The geological timeline is important as it portrays the presence and arrival of the organisms and the formation of some of the structures.
Therefore, mammals arrived at option B. 200 million years ago.
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in the equation e=mc^2, m represents
Answer:
which E represents units of energy, m represents units of mass, and c2 is the speed of light squared, or multiplied by itself.
Explanation:
M stands for Mass.
What does the Third Witch predict for Macbeth?
Answer:
Macbeth will be a thane, Macbeth will be king and Banquo's sons will be kings.
Explanation:
This is biology make sure to put your question under the English category.
Can non renewable sources of energy be sufficient to meet our need? Give reasons for your answer
Answer:
Fossil fuels
Explanation:
Fossil fuels can generate a large amount of electricity at a single location.
They can be found very easily.
They are cost-effective.
Transportation of oil and gas can be done easily through pipelines.
They have become safer over time
Where do transcription and translation occur in the cell?.
Answer:
Thus, in eukaryotes, while transcription occurs in the nucleus, translation occurs in the cytoplasm.
What effect have at-home dna tests had on law enforcement? readworks.
Answer:
By matching a suspect’s DNA with DNA from a suspect’s distant relatives who have taken a commercial at-home DNA test, law enforcement can zero in on a perpetrator.
The medium ground finch (Geospiza fortis) and the cactus finch (Geospiza scandens) are similar in size and appearance. As you can tell from their scientific names, they belong to different species. What taxonomic ranks do they share?
Which is the best example for genetic diversity?
A. Humans that have different colored hair.
B. A species of bird that eats berries from trees in one area, but eats them off the ground in another area.
C. Fish that eat tadpoles in the pond, but eat small fish in the lake.
D. A species of snake that sleeps in the trees in the forest, but sleeps underground in the desert.
colorsAnswer:
A
Explanation:
We get our hair color from genes and there is a wide variety of hair colors for us :)
Why is nitrogen important to plants? What important biological macromolecules require nitrogen?
Answer:
Nitrogen is important to plants because without nitrogen plants would not be able to make food (photosynthesis).
Nucleic acids (DNA and RNA) are polymers of nucleotides each of which consists of pentose sugar, phosphate molecule, and one nitrogenous base (adenine, guanine, cytosine, uracil, and thymine).
Explanation:
The nitrogen cycle is important biologically because nitrogen is a major constituent of phospholipids, ATP, and other energy-storing molecules, it is a component of amino acids proteins, and nucleic acids, and it forms the framework for organic molecules that are essential to all organisms, and the processes in the mitochondria require major amounts of nitrogen.
What is the Nitrogen cycle?The nitrogen cycle may be defined as a type of biogeochemical cycle through which nitrogen and its derivatives move through both living and non-living things within the entire atmosphere. It involves the series of processes through which nitrogen and its compounds are interconverted in the environment.
The nitrogen cycle is not important biologically because the atmosphere is composed of 78% nitrogen; therefore nitrogen is freely available to all living organisms, regardless of where it is in its cycle.
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What is the connection between a cell and a organism?
Answer:
Organisms are made up of cells. Tissues become organs, organs become organ systems, and organ systems become organisms. An organism is essentially nothing more than a massive collection of diverse cells that collaborate for two main purposes. The immediate (immediate) purpose for this is to ensure one's survival.
Explanation:
What are 5 uses of Protiens?
Answer:
1. Build. Protein is an important building block of bones, muscles, cartilage and skin. In fact, your hair and nails are comprised mostly of protein.
2. Repair. Your body uses it to build and repair tissue.
3. Oxygenate. Red blood cells contain a protein compound that carries oxygen throughout the body. This helps supply your entire body with the nutrients it needs.
4. Digest. About half the dietary protein that you consume each day goes into making enzymes, which aids in digesting food, and making new cells and body chemicals.
5. Regulate. Protein plays an important role in hormone regulation, especially during the transformation and development of cells during puberty.
hope this helps
Answer:
Control the rates of reactions
Form bones and muscles
Regulate cell processes
Fight diseases Transport materials in and out of cells
When a plant cell is placed in a _ solution there will be a loss of water causing the plant to wilt
Answer:
transpiration
Explanation:
I think is transpiration
Ingested nutrients spend at least ______ hours in the small intestine as chemical digestion and absorption are completed.
Ingested nutrients spend at least 12 hours in the small intestine as chemical digestion and absorption are completed.
Given: Ingested nutrients spend at least ______ hours in the small intestine as chemical digestion and absorption are completed.
Answer:
12 hours
Explanation:
Digestion is a form of catabolism or breaking down of substances that involves two separate processes: mechanical digestion and chemical digestion. Mechanical digestion involves physically breaking down food substances into smaller particles to more efficiently undergo chemical digestion.
What type of star has a high temperature but a low luminosity? Question 2 options: Blue Red Yellow White.
The White Dwarf star has a high temperature but low luminosity.
The cities of Rabat in Morocco and Beirut in Lebanon are both at the 34° N latitude, same as Los Angeles, California, but further east on Earth. Can they use the NASA Star Finder?(1 point)
Yes, but they should adjust for their local time.
Yes, but they should adjust for their local time.
No, they have to construct one using their country’s star charts.
No, they have to construct one using their country’s star charts.
Yes, they can use it as is.
Yes, they can use it as is.
No, they have to adjust it eastward for their location.
Answer:
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Explanation:
Yes, they can use the NASA Star Finder. Thus, the correct option for this question is C.
What is NASA Star finder?NASA Star finder may be defined as an object that tracks a star, like a camera, takes a picture of the star patterns in its view, and significantly compares the picture with its built-in star maps.
A NASA star finder is able to track any sort of star at any location. Similarly, it has the capability to locate the cities of Rabat in Morocco and Beirut in Lebanon which are both at the 34°N latitude. This is the efficiency of such type of object that is significantly based on the accurate function of the satellites.
Therefore, according to me, they can definitely use the NASA Star Finder. Thus, the correct option for this question is C.
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Pepsin is an enzyme produced in the stomach. Pepsin has an optimum pH that is very acidic, between a pH of 1.0 and 2.0. In an experiment involving the enzyme pepsin, the pH is raised from 2 to 11. What will be the MOST LIKELY effect of this on the reaction?
A) The enzyme will denature, stopping the reaction
B) The activation energy of the reaction would be reduced
C) The rate of reaction will reduce due to a decrease in the kinetic energy of the molecules
D) The rate of reaction will increase due to the increased number of collisions of the enzyme and substrate
i need funny make me laugh
Answer:
What did the fish say when he swam into a wall?
Dam.
Explanation:
No. You do not deserve to laugh.
a
What would coffee, at a pH of 4, be
considered?
A. a buffer
B. acidic
C. basic
D. neutral
Answer:
its b
Explanation:
Explain the mechanism of the movement of the human forelimbs
Answer:
Forelimb protraction starts with a rapid flexion of the shoulder joint bringing the humerus close to its maximum cranial rotation angle, almost in parallel to the mid-sagittal plane. This position has already been reached by the middle of the swing phase.
The oxygen side of a water molecule is _____.
Answer: partially negative
Explanation:
You didn't specify much what type answer you were looking for in the blank, so I assumed that you're asking for the charge of the particle.
Which process occurs in the chloroplast of plant cells?
a. Photosynthesis
c. Reproduction
b. Cellular Respiration
d. Protein synthesis
Answer:
a
Explanation:
in plants photosynthesis take place in chloroplast ,which contain the chrophyll
Two strands of DNA produced during replication are copies of each other.
This is because what is true about each strand in the double helix?
Question 4 options:
they are continuous
they are complementary
they are connected
they are identical
Answer: They are complementary
Explanation:
Essentially, two strands of DNA are complementary means that the bases are arranged along the molecule such that the chains fit together tightly so as to be lightly secured by hydrogen bonds
Answer:
B
Explanation:
They are complementary
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Which statement best describes the relationship between photosynthesis and cellular respiration?
Group of answer choices:
A. Photosynthesis produces carbon dioxide, which is the reactant required for cellular respiration to occur.
B. Photosynthesis and cellular respiration produce the same products, but different reactants.
C. Photosynthesis and cellular respiration require the same reactants, but produce different products.
D. Photosynthesis produces oxygen, which is the reactant required for cellular respiration to occur.
Answer:
the answer is D
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How do earthworms create a moist local environment for gamete fusion?.
Answer:
Earthworms create a moist local environment for gamete fusion by secreting mucous.
Explanation:
Plants allows gas exchange and many other functions to help the ecosystem. Correctly
match the words on the with the explanations.
Words:
Guard Cells
meristematic tissue
root hairs
xylem
Phloem
Possible explanations:
Growing sections
increases surface area for water absorption
open and close to allow gas exchange
vascular tissue for movement from roots to leaves
vascular tissue for movement from leaves to roots
Answer:
xylem → vascular tissue for movement from roots to leaves
phloem → vascular tissue for movement from leaves to roots
Root Hair → increases surface area for water absorption
Meristematic tissue → Growing Sections
Guard Cells → open and close to allow gas exchange
Explanation:
The xylem distributes water and dissolved minerals upward through the plant, from the roots to the leaves. The phloem carries food downward from the leaves to the roots.
Root hairs increase the surface area for the absorption of water and minerals from the soil.
Meristem is the name of the specific area where plant growth occurs.
Guard cells are cells surrounding each stoma. They help to regulate the rate of transpiration by opening and closing the stomata.
[RevyBreeze]
Answer:
xylem → vascular tissue for movement from roots to leaves
phloem → vascular tissue for movement from leaves to roots
Root Hair → increases surface area for water absorption
Meristematic tissue → Growing Sections
Guard Cells → open and close to allow gas exchange
Explanation:
The xylem distributes the water and dissolved minerals upward through the plant, from the roots to the leaves. The phloem carries food downward from the leaves to the roots.
Root hairs increase the surface area for the absorption of water and minerals from the soil.
Meristem is the name of the specific area where plant growth occurs.
Guard cells are cells surrounding each stoma. They help to regulate the rate of transpiration by opening and closing the stomata.
Explanation:
