Explain why the steroid hormone estradiol (MW 272) readily crosses membranes by simple diffusion but the much smaller H requires transport proteins
Answer:
Estradiol has a higher partition coefficient than H+ ions
Explanation
Estradiol is a non-polar and hydrophobic molecule that has a higher partition coefficient than H+ ions, it means that the cell membrane is more permeable to this molecule because it can dissolve in and diffuse within the hydrophobic phase of the membrane. The movement of polar charged molecules (even small H+ ions) requires the input of energy to be able to dissolve within the lipid bilayer. In consequence, the movement of H+ ions requires proteins capable of transporting these protons through the membrane.
Can someone help meee ...
Answer:
Change fishing methods
Explanation:
Limiting how they fish and how many fish they catch would help the population
do dicot and monocot leaves have different adaptations?
Answer:
Yes. Monocots have leaves with parallel venation, and dicots have leaves with reticulate, net-like venation. Describe an example of a plant with leaves that are adapted to cold temperatures. Conifers such as spruce, fir, and pine have needle-shaped leaves with sunken stomata, helping to reduce water loss.
Explanation:
I looked it up I'm not actually that smart lol
An energy pyramid is shown below. Which portion of the diagram represents the level with the least available energy?
Answer:
Explanation:
The top predator. This is because, when energy goes higher on the pyramid, ten percent is taken in by each animal, so less energy is left for each animal.
Plzz help!
Which best describes the relationship between two species and a niche?
If two species have the same niche, one species will always become extinct.
Two species are able to occupy the same niche in the same habitat.
Two species cannot occupy the same niche in the same habitat.
If two species have the same niche, one species will always move.
Answer:
C. Two species cannot occupy the same niche in the same habitat.
Explanation:
just took the quiz
Answer:
C
Explanation:
I did it on edge 2020
(ANSWER NEED RIGHT AWAY!! PLS) A classmate claims that an apple and cupcake, both about the same size, give you the same amount of energy. Do you agree or disagree with this
statement? Explain.
Answer:
No, just because something is the same size doesn't mean it will have the same amount of energy. One thing can have more positive electrons and make it have more energy than the other.
what will most likely happen if the plankton population decreases in this ocean system
Answer: The shrimp population would decrease.
Explanation:
Define coefficient to show its scientific meaning
Answer:
In science, a coefficient is a constant term related to the properties of a product. In chemistry, when you see a number in front of a chemical like 2H2o, you're looking at the coefficient.
When ice and snow move overland in compacted large quantities, they erode the soil and can change landforms. Which object creates this type of erosion?
When substances are constantly moving
back and forth across a cell membrane, the
cell is said to be in a state of?
The diffusion of water molecules a secectively permeable membrane.
What is Diffusion?The net passive movement of molecules or particles from areas of higher concentration to areas of lower concentration is known as diffusion. There needs to be a concentration gradient for diffusion to happen.
The dissimilarity in the quantity of solutes, particles, or molecules between the two locations will drive them to travel between the two regions.
The gradient created by the uneven particle concentration between two fluids will cause the particles to move in order to balance the discrepancy in concentrations. However, solutes do not migrate in a single direction during the diffusion process.
Therefore, The diffusion of water molecules a selectively permeable membrane.
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Students in a science class visited four local ecosystems. The students observed the species present in each ecosystem and recorded their observations in the table.
Based on these observations, which ecosystem is likely to be the least sustainable?
A.Ecosystem 1, because it has the fewest species
B.Ecosystem 2, because it includes both aquatic and terrestrial species
C.Ecosystem 3, because it has few predators
D.Ecosystem 4, because it supports many animals
the answer is A
this is because in ecosystem 1 there are only predators and no other species are observed. therefore predators have less food to eat thus they will die of hunger or move to another ecosystem
This is because in ecosystem 1 there are only predators and no other species are observed. therefore predators have less food to eat thus they will die of hunger or move to another ecosystem.
What is Ecosystem?
An ecosystem is a geographic area where plants, animals, and other organisms, as well as weather and landscape, work together to form a bubble of life.
Ecosystems contain biotic or living, parts, as well as abiotic factors, or nonliving parts. Biotic factors include plants, animals, and other organisms. Abiotic factors include rocks, temperature, and humidity.
Every factor in an ecosystem depends on every other factor, either directly or indirectly. A change in the temperature of an ecosystem will often affect what plants will grow there, for instance.
Therefore, This is because in ecosystem 1 there are only predators and no other species are observed. therefore predators have less food to eat thus they will die of hunger or move to another ecosystem.
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Which of the following is not one of the three steps (processes) involved in urine formation?
The following is not one of the three steps (processes) involved in urine formation - Erythropoietin production.
ErythropoietinIt is a hormone that has no role in urine production. The steps of urine production are:
glomerular filtration - the filtration of blood, which is carried out by the glomerulus tubular reabsorption - The tubular epithelial cells in different segments of the nephron perform absorption (reabsorption) either by active or passive mechanismstubular secretion - helps in the maintenance of an ionic and acid-base balance of body fluids.Learn more about urine production:
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What is the protozoan and who is the first to observe one?
Answer:
Protozoa is an informal term for a group of single-celled eukaryotes, either free-living or parasitic, which feed on organic matter such as other microorganisms or organic tissues and debris. Anton van Leeuwenhoek was the first person to see protozoa, using microscopes he constructed with simple lenses. Between 1674 and 1716, he described, in addition to free-living protozoa, several parasitic species from animals, and Giardia lamblia from his own stools.
Annie is herding cattle when one of them gets spooked. What is the likely reaction of the herd? A they will all become agitated B they will not react to a single cow C they will follow the direction of the handler D they will try to protect the spooked cow
Answer:
A
Explanation:
Answer:
the answer is D, they will all become agitated
Explanation:
i got it wrong and it showed the correct answer
SELECT ALL THAT APPLY. Which two elements make up the water cycle?*
2 points
Carbon
Sulfer
Nitrogen
Gold
Phosphorus
Hydrogen
Oxygen
Helium
This is a required question
Answer:
Maybe
hydrogen and oxygen
helpppppppppppppppppppppppppp
Answer: B
Explanation:
As the temperature rises, the graph shows that the solubility increases
In a given strand of dna the number of thymines
A. Is same as the number of uracils
B. Is double the number of guanines
C. Is double the number cytosines
D. Is the same as the number of adenines
Plz answer ASAP
Which is an example of a polygenic trait?
Answer:
Polygenic traits are traits that are controlled by multiple genes instead of just one. The genes that control them may be located near each other or even on separate chromosomes. Some examples of polygenic traits are height, skin color, eye color, and hair color.
Answer:blood type in humans and birth weight calves
Explanation:
what do plant cells do?
Answer:
Create glucose
Explanation:
they go through photosynthesis and create glucose
which ligament connects the shaft of the metatarsals
Answer:
plantar metatarsophalangeal ligament
Explanation:
The plantar metatarsophalangeal ligament attaches proximally from the head of the metatarsal to the base of the phalanx distally. The ligament extends plantarly from the medial tubercle to the lateral tubercle along the plantar surface of the joint.
The ligament that connects the shaft of the metatarsals is :
-Plantar metatarsophalangeal ligament
MetatarsalsThe ligament that connects the shaft of the metatarsals is the plantar metatarsophalangeal ligament.
The plantar metatarsophalangeal tendon connects proximally from the head of the metatarsal to the base of the phalanx distally.
The tendon amplifies planarly from the average tubercle to the sidelong tubercle along the plantar surface of the joint.
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10. What changes during a chemical reaction between two compounds?
A. number of atoms
B. chemical bonds
C. total mass
D. total energy
Answer:
I think it's chemical bonds I'm not of that helped
The changes occurs in chemical bond during a chemical reaction between two compounds. The correct option is B.
What is chemical bond?A chemical bond is a long-lasting point of attraction among atoms, ions, or molecules which then allows chemical compounds to form.
Ionic bonds are formed by the electrostatic force between oppositely charged ions, whereas covalent bonds are formed by the sharing of electrons.
A covalent bond is the strongest bond in chemistry. In such bonding, each atom shares electrons that bind them together.
The bonds that hold molecules together break apart and form new bonds during chemical reactions, rearranging atoms into different substances.
Each bond requires a different amount of energy to break or form; without this energy, the reaction cannot occur, and the reactants remain unchanged.
Thus, the correct option is B.
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Identify the "stomach" of the cell that breaks down waste and digests organelles that are not needed
Answer:
Lysosomes
Explanation:
A lysosome is an organelle that contains enzymes that break down and digest unneeded cellular components, such as a damaged organelle.
What is a pathway for an atom (carbon)
Answer:
-- --
)____(
Explanation:
The carbon atom can make a transition between photosynthesis and respiration because the carbon atom is both a reactant and a product. For example, plants take in carbon dioxide for photosynthesis which releases oxygen. Then other organisms use this oxygen for respiration, which releases carbon dioxide.n:
You are performing an experiment with Primase, using a specific DNA template. In this experiment, you provide NTPs (ATP, UTP, CTP, GTP) which contained only one radioactive phosphate group, in the alpha-phosphate position (the alpha- phosphate is the one attached to the sugar. the other phosphates are beta and gamma). After RNA synthesis occurs, you separate the resultant RNA strand any of the NTPs that have not been incorporated into the RNA, and measure the radioactivity of the newly synthesized RNA.A) In this experiment, would you expect the newly synthesized RNA be radioactive? Explain why.B) If you forgot to add CTP when you did the experiment, would the resulting RNA be radioactive?C) If you did the experiment, with all the NTPs provided, but only the beta phosphate was radioactive for each of the NTPs, would radioactivity be found in the RNA? Explain why.D) If you did the experiment, with all the required NTPs, but only the ATP was radiolabelled Would radioactivity be found in the RNA? Explain why.
Answer:
(a). Yes.
(b). RNA becomes Radioactive.
(c). No.
(d). It depends. If the gamma phosphate and beta phosphate are not labeled, then the RNA will have certain degree of radioactivity.
Explanation:
So, let us do right into the explanation behind the answers to the questions asked.
(a). The answer to this part of the question is "Yes" because in creating or in the formation of the glycosidic bond, all the alpha phosphate group were taken into consideration that is they were all used, thus making the newly synthesized RNA to be radioactive.
(b). The RNA becomes Radioactive is the answer to this part of this question because CTP is needed in the experiment.
(c). The answer to this part (c) of this question is ''No'' because the only thing that takes part in bonding is the alpha phosphate.
(d). It depends. If the gamma phosphate and beta phosphate are not labeled, then the RNA will have certain degree of radioactivity.
Read each question carefully. Write your response in the space provided for each part of each question. Answers must be written out in paragraph form. Outlines, bulleted lists, or diagrams alone are not acceptable and will not be scored.
White blood cells called B cells produce proteins that can be used for the treatment of certain illnesses. However, these B cells do not live for very long on their own. To keep the B cells growing for a long time in laboratories, scientists fuse the B cells with cancer cells (fused B-cancer cells) that do grow for a very long time. The particular cancer cells used for the fusion are treated with chemicals that make them unable to produce the nitrogenous bases adenine and guanine, but the B cells with which they are fused do produce these nitrogenous bases. The scientists grow the large fused B-cancer cells in a growth medium that contains necessary nutrients for the cells and includes a source of carbon.
(a) Describe the role of carbon in biological systems.
(b) The membranes of both B cells and the cancer cells are largely composed of phospholipids. Explain how, when the membranes are fused, the polar parts of the phospholipids from one cell will interact with the phospholipids from the other cell and how the nonpolar parts of the phospholipids from one cell will interact with the phospholipids from the other cell.
(c) Make a claim about the most immediate effect on the fused B-cancer cells if the fused cells are transferred to a growth medium that lacks a source of nitrogen.
(d) Provide reasoning with evidence based on the composition of biological macromolecules to support your claim.
Answer: they can be ruduce
Explanation:
which fungi has single cell
Yeasts are known as single celled fungi. Around 1,500 species of fungi are recognised as yeasts.
Why does photosynthesis occur at the upper surface of the leaf than the lower surface
Answer: The sunlight hits the upper surface of the leaf, and sunlight is crucial to the photosynthesis process. The leaves trap the energy and use it to create glucose.
The fascia found on the surface of the muscle is called the superficial fascia.
True
False
how do eumelanin and pheomelanin affect our skin color?
Answer:
There are two types of melanin--eumelanin and pheomelanin. In general, the more eumelanin in your skin, the darker your skin will be. People who make more pheomelanin than eumelanin tend to have lighter skin with freckles. Like many other traits, the amount and kind of pigment in your skin is controlled by genes
Explanation:
From what age are the earliest discovered paintings of swimmers?
Answer:
The paintings are estimated to have been created during the Neolithic 8,000 years ago.