DNA helicase enzyme unwinds and breaks H bonds between the 2 complementary strands using ATP to separate the 2 strands.
Red blood cells do not have a nucleus but the ____ has a lot of haemoglobin to carry more oxygen.
Answer:
Red blood cell has lot of haemoglobin to carry more oxygen
sympathetic nerve fibers are not associated with situations involving __________.
Answer:
Digestion
Explanation:
The parasympathetic division handles things that stimulate digestion.
the endosymbiont theory proposes a model for the evolution of mitochondria. according to the model, an ancestral eukaryote engulfed a small, free-living prokaryotic organism. the engulfed prokaryote then formed an endosymbiotic relationship with the eukaryotic host. which of the following observations best supports the model?
Answer:
Mitochondria and some prokaryotes share similar metabolic reactions that produce ATP.
Correct. The observation that mitochondria and some prokaryotes share similar metabolic reactions that produce ATP supports the model that mitochondria are endosymbionts that originated from a free-living prokaryote.
Explanation:
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Chaz is visiting California. He notices it is very dry, with soil mostly made of sand and rock. What type of biome is he in?DesertTemperate grasslandsTropical rain forestTundra
Answer:
Desert
Explanation:
Deserts are very dry and rocky which is what Chaz is explaining
A type of biome that is very dry, with soil made mostly of sand and rock found in California is known as the desert.
What are biomes?Biomes has been considered as the higher level of organization than ecosystems. Biomes are land areas formed by the influence of climate, rainfall, and latitude. There are various kinds of biomes namely desert biome, prairie biome, savanna biome, tropical forest biome, deciduous forest biome, tundra biome, and mangrove forest biome.
The Mojave Desert is a desert that comprises parts of southern California and small parts of Northern California, southwestern Utah, southern Nevada, and northwestern Arizona, in the United States.
A desert is a biome which receives very little annual precipitation. As a result of this it exhibit very hot and dry climatic conditions. The soil generally losses it's fertility which may either become compact or remain in loose form due to erosion like sand. The plants exhibit fleshy leaves so as to prevent the loss of water through transpiration.
Therefore, A type of biome that is very dry, with soil made mostly of sand and rock found in California is known as the desert.
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Which of the following is/are producers?
SELECT ALL THAT APPLY
a certain fungi
b certain bacteria
call plants
d algae
Answer:
Ans- B)certain bacteria
C) all plants
D) Algae
Producers:the organism which make their own food.Also known as autotrophs.
Help with the question in the red box please
Answer:
It Must be D
Explanation:
Not sure how to explain
Colchicine is a toxin that binds to tubulin proteins and prevents microtubules from elongating. What effect might this have on dividing cells
The effect Colchicine might have on dividing cells is that the duplicated chromosomes might not be able to segregate into daughter nuclei.
Colchicine is an alkaloid that attaches to tubulin and prevents it from polymerization to microtubules. As we know that Microtubules are a component of the cytoskeleton of a cell that aids in molecular mobility inside the cell.
During cell division, chromatin condenses into chromosomes, which are then connected to microtubules. The chromosomes are separated into daughter cells by microtubules.
When these cells are treated with colchicine, tubulin polymerization to microtubules may not occur, and the chromosomes containing daughter nucleic might not be separated.
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Mr. Carter draws a box with a particle diagram of a liquid on the whiteboard. Next, he draws another box with a particle diagram of a solid, but he leaves this box blank for one of his students to fill in.
What should Mr. Carter's student draw in the blank box?
Mr. Carter's student must draw particles very close together.
We can arrive at this answer as follows:
Mr. Carter is showing how the particles fit into a solid substance and a liquid substance.In a liquid substance, the particles are separated from each other, which allows the characteristic fluidity of liquids.In a solid substance, the particles are very close to each other, not allowing space between them.In this case, we can say that Mr. Carter's student, when drawing the particles of solid substance, must draw them very close to each other, not allowing any space between them, preventing them from moving.
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Which of the following is a developmental issue that occurs when an infant's vertebral column does not close all the way?
Answer:
d. Spina bifida
Explanation: is correct
Where is the enzyme amylase found?
Answer:
b. In saliva and the pancreas
Explanation: is the correct answer
Look at the diagram Which structure holds the original code from the DNA gene?
Answer:
The answer is 4/D)4. Don't expect me to get scientific in this, I'm using brainly and coursehero after all. Sorry for being a year late, hopefully it took you a year to finish the test. . .
Explanation:
K12/Keystone
What are some geological characteristics of glaciers in Glacier National Park?
Answer:
The minimum size criterion for a glacier is 0 .1 km², or about 25 acres. Below this size, the accumulated ice generally does not move and is stagnant. Many years of snow accumulation compacts the bottom layers of snow into ice. Under the huge weight of the snowpack (usually 100ft/30.5m thick or more), the ice becomes viscous and allows the mass to slide downhill. The appearance of crevasses and cracks attest to a glacier’s movement. Glaciers don't "bulldoze" landscape as much as they melt and re-freeze, plucking material from areas of snow deposition and moving it to other areas, like downhill conveyor belts.
Explanation:
Right on ED2021, good luck!
why do wildlife populations tend to decline as the human population grows?
Answer:
Human populations compete for the same space, water, and other resources that are required for wildlife survival. Contact with humans protects domesticated animal populations from disease but decreases nearby wildlife populations.
Explanation:
Which of the following is an example of a bond being traded on the secondary market?
Answer: D
Explanation: An investor sells a bond to another investor
An example of the secondary market is the investor sells a bond to another investor.
What is the secondary market?The secondary market is the market where the investor purchases and sells the securities.
An example could be the stock market.
Here the securities are traded when the company has been sold to provide on the primary market.
hence, An example of the secondary market is the investor sells a bond to another investor.
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12. A primate's ability to hold objects in its hands/feet is an evolutionary development that allowed it to
A. walk upright B. use simple tools C. gather food D.create elaborate social systems
Answer:
Its B I took the test
Explanation:
What math is the slope intercept form from.
It's from optional maths
Order the steps of the urine formation process
Answer:
glomerular filtration, reabsorption, and secretion.
Explanation:
The production of orchids by cutting is an example of.
The production of orchids by cutting is an example of vegetative propagation.
There are two methods of growing orchid trees i.e. through seed as well as from vegetative part. Most of the farmers grow orchids plants through vegetative propagation because it takes less time to reach maturity while on the other hand, growing orchids through seed takes more time.
So that's why the farmer prefers vegetative propagation as compared to seed so we can conclude that the production of orchids by cutting is an example of vegetative propagation.
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Four friends were walking on a nature trail in their local park. They began to question whether or not the trees need to breathe, or need food like humans do. Here are their thoughts
:Katie:I think that plants need to eat but don’t need to breathe.
Hugo:I think that plants need to eat and need to breathe.
Danielle:I think that plants need to breathe but don’t need to eat.
Liam:I don’t think plants need to eat or breathe.
Circle the person you most agree with. Explain why you agree with that person
Answer: I agree with Hugo that plants do need to breathe and eat because Plants do require oxygen to respire, the process in return gives out carbon dioxide and eat thorugh the process of phoyosynthesis
Describe the structural make-up of a gene?
Answer:
Structure of gene:
The chemical structure of a gene comprises nucleotides. A part of DNA- genes are made up of A, T, G and C nucleotides
Explanation:
Obesity is a digestive system issue for which of the following age groups?
Answer:
d. All of the above
Explanation: is correct
How does the physical environment in a tide pool change between tides?
Match each part of the neuron with the correct label.
Answer:
yes. those are labeled correctly
Explanation: post protected
Can climate changes be linked only to the greenhouse effect? Why or why not?
An increase in the atmospheric concentrations of greenhouse gases produces a positive climate forcing, or warming effect. ... The warming effect associated with carbon dioxide alone increased by 36 percent
a eukaryotic cell that receives a go-ahead signal at the g1 checkpoint of the cell cycle will
Answer: If mammalian cells receive a go-ahead signal at the G1 checkpoint, they will D. complete the cycle and divide. G1 checkpoint occurs between the G1 and S phase of the cell cycle. When the cell is grown sufficiently and produces all components of DNA replication it enters in the S phase.
If mammalian cells receive a go-ahead signal at the G1 checkpoint, they will complete the cell cycle and divide.
What is cell cycle?The cell cycle, or cell-division cycle, is the series of events that take place in a cell that cause it to divide into two daughter cells.
Moreover, a cell cycle is a series of events that takes place in a cell as it grows and divides. A cell spends most of its time in what is called interphase, and during this time it grows, replicates its chromosomes, and prepares for cell division. The cell then leaves interphase, undergoes mitosis, and completes its division.
The cell cycle consists of a series of steps during which the chromosomes and other cell material double to make two copies. The cell then divides into two daughter cells, each receiving one copy of the doubled material.
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When we inhale what do we bring in?
Answer:
oxygen
Explanation:
We breathe in oxygen into our lungs and let out carbon dioxide.
Item 5
What molecule that is created during photosynthesis provides energy for cellular processes?
ATP
chlorophyll
glucose
oxygen
Answer:
Glucose is the answer because it is one of the end products of photosynthesis which is used to generate ATP for the cell through the first process of cellular respiration glycolysis
Answer:
glucose
Explanation:
took test
What is the role of density changes in a convection cycle
Answer:
Explantion
Convection is heat transfer due to a density differential within a fluid. As water's temperature increases in the presence of a heat source, it will become less dense and rise. As it moves up and away from the heat source, it cools and becomes more dense and sinks. ... Air from above the ocean is colder and more dens
Convection is the transfer of heat caused by a density difference within a fluid. Water becomes less dense and rises as its temperature rises in the presence of a heat source.
What is convection?Convection is a method of moving heat that is also known as a heat transfer mechanism. When a fluid, such as air or water, is in motion, heat is transferred. Temperature differences across the fluid drive convection.
Differential heating causes convection currents. Warmer (less dense) material rises, while cooler (more dense) material sinks.
This movement is responsible for the formation of circulation patterns known as convection currents in the Earth's atmosphere, water, and mantle.
Convection is the heat transfer resulting from variations in density within a fluid. In the presence of a heat source, water becomes less dense and rises in density.
Thus, this is the role of density changes in a convection cycle.
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give 3 examples or where potential energy was convertedto kilinetic energy
Answer:
give 3 examples or where potential energy was convertedto kilinetic energy.
the type of voltage-gated channel that possesses an inactivation gate that temporarily closes after the channel is active is the
The sodium channel possesses an inactivation gate that temporarily closes after the channel is active.
In neurons, sodium channels are responsible for the ascending phase of the action potential (depolarization).
Characteristically, this channel has two transmembrane voltage-dependent gates.When the membrane is depolarized to the threshold, both gates are activated, but since one of them opens rapidly while the other closes slowly, the channel remains open for less than 2-5 milliseconds.Therefore, we can conclude that the sodium channel is responsible for the depolarization and possesses two gates which one temporarily closes after the channel is active.
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