PLEASE HELP
Which of these contain
DNA and/or RNA?
Answer:
dna and rna
Explanation:
DNA is a double-stranded molecule, while RNA is a single-stranded molecule. ... DNA and RNA perform different functions in humans. DNA is responsible for storing and transferring genetic information, while RNA directly codes for amino acids and acts as a messenger between DNA and ribosomes to make proteins.Feb 2, 2020
Which of the following best describes hematuria?
the correct answer is *Blood in the urine
If this site wants unproven or incorrect answers and deletes correct answers with proof, then wow.
Answer:
Blood in the urine is correct
Explanation:
Natural selection, mutation, genetic drift, nonrandom mating, and gene flow are all mechanisms of ______ and can change allele frequencies in populations.
They are all mechanisms of Evolution and can change allele frequencies in populations
Natural selection, mutation, genetic drift and gene flow are all capable of causing varying changes in allele frequencies in a population. and these changes leads to the violation of Hardy-Weinberg assumptions
Hardy-Weinberg assumption states that; for a population to experience an unchanged allele frequencies, certain conditions must be met by the population such as ; absence of natural, random mating , absence of migration and absence of mutation.
Hence we can conclude that Natural selection , mutation, genetic drift and gene flow are all mechanisms of Evolution and can change allele frequencies in populations
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the blood pressure in the large systemic arteries is greatest during:
Answer:
when blood is pumped out of the heart into the arteries.
Explanation:
Hope its help you!!
True or False: Transcription and Translation can occur at the same time for a single mRNA in prokaryotes.
Answer:
False, they cannot
what is the study of hereditary called?
Answer:
GeneticsExplanation:
Genetics is the study of heredity in generalHOPE IT HELPS!how long does it take new species to form on earth?
Research found that a major change to persist and for changes to accumulate took about one million years
Million of years...
tehy where evolving for a couple million years until we have the animals we have now
QUESTION: If there was no atmosphere around Earth, how would that impact your life in the planet?
Have you ever wondered what would happen if Earth lost its atmosphere? It's believed that the planet is slowly losing its atmosphere, bit by bit, as it bleeds off into space. But what if Earth instantly lost its atmosphere, all at once? Just how bad would it be? Would people die? Would everything die? Could the planet recover?
What Would Happen?
Here's a breakdown of what could be expected:
It would be silent. Sound requires a medium to transmit waves. You could feel vibrations from the ground, but you wouldn't hear anything.
Birds and planes would fall from the sky. Although we can't see air (except clouds), it has mass that supports flying objects.
The sky would turn black. It's blue because of the atmosphere. You know those pictures taken from the Moon? The Earth's sky would look like that.
All unprotected plant and animal life on the Earth's surface would die. We can't survive long in a vacuum, which is what we'd have if the atmosphere suddenly vanished. It would be much like being "spaced' or shot out of an airlock, except the initial temperature would be higher. Eardrums would pop. Saliva would boil. But you wouldn't die instantly. If you held your breath, your lungs would pop, which would be the quickest (albeit most painful) death. If you exhaled, you'd pass out in about 15 seconds and die in around three minutes. Even if you were handed an oxygen mask, you wouldn't be able to breathe. This is because your diaphragm uses the pressure difference between the air inside your lungs and outside your body to inhale.
Let's say you have a pressure suit and air. You'd live, but you'd get a massive sunburn on exposed skin because the Earth's atmosphere is what filters solar radiation. It's hard to say how much trouble you'd be in from this effect on the dark side of the planet, but being in direct sunlight would be severe.
The rivers, lakes, and oceans would boil. Boiling occurs whenever vapor pressure of a liquid exceeds external pressure. In a vacuum, water readily boils, even if the temperature is warm. You can test this yourself.
Although water would boil, the water vapor would not fully replenish the atmospheric pressure. An equilibrium point would be reached where there would be enough water vapor to prevent the oceans from boiling off. The remaining water would freeze.
Eventually (long after surface life had died), solar radiation would break atmospheric water into oxygen, which would react with carbon on the Earth to form carbon dioxide. The air would still be too thin to breathe.
The lack of atmosphere would chill the Earth's surface. We're not talking absolute zero cold, but the temperature would drop below freezing. Water vapor from the oceans would act as a greenhouse gas, raising the temperature. Unfortunately, the increased temperature would allow more water to transition from the sea into the air, likely leading to a runaway greenhouse effect and making the planet more like Venus than Mars.
Explanation:
Organisms that need air to breathe would die. Plants and land animals would die. Fish would die. Most aquatic organisms would die. However, some bacteria could survive, so losing the atmosphere wouldn't kill all life on Earth. Chemosynthetic bacteria wouldn't even notice the loss of atmosphere.
Volcanoes and geothermal vents would continue to pump out carbon dioxide and other gases to add to the water. The most significant difference between the original and new atmosphere would be the much lower abundance of nitrogen. Earth could replenish some nitrogen from meteor strikes, but most of it would be lost forever.
Could Humans Survive?
There are two ways human beings could survive losing the atmosphere:
Build radiation-shielded domes on the Earth's surface. The domes would need a pressurized atmosphere and would need to support plant life. We would need time to build biodomes, but the result would not be much different from trying to survive on another planet. Water would remain, so there would be a source of oxygen.
Build a dome under the sea. The water could provide pressure and filter out some solar radiation. We wouldn't want to filter out all radiation because we'd probably want to grow plants (though maybe it would be possible to learn some tasty ways to prepare bacteria as food).
The oldest of Hawaii's volcanic islands are those that
The oldest of Hawaii's volcanic islands are those that are the farthest distance from the hotspot.
Hope this helps!
Answer:
The oldest of Hawaii's volcanic islands are those that are the farthest distance from the hotspot.
how might differences in enzyme concentrations affect rates of photosynthesis and respiration?
Answer:
enzymes are biological catalysts which speed up the rate of biochemical reactions
Increasing the concentration of enzymes would speed up the rate of photosynthesis and respiration due to the fact that the enzyme substrate complex can occur on a much larger scale i.e. more enzymes would be able to bind with more substrates producing more Oxygen in the case of photosynthesis and more ATP in respiration
Decreasing the concentration of enzymes would have the opposite effects
The differences in enzyme concentrations affect rates of photosynthesis and respiration are process accelerators.
What enzymes are involved in photosynthesis?Enzymes such as Rubisco, sedoheptulose-1,7-bisphosphatase, aldolase and transketolase dominate the control of photosynthesis. Reductive fixation of CO2 requires ATP and NADPH and their concentrations in the stroma increase when chloroplasts are illuminated.
The chemical reactions involved in photosynthesis are controlled by enzymes . The temperature increases the number of collisions increases, therefore the rate of photosynthesis increases. However, at high temperatures, enzymes are denatured and this will decrease the rate of photosynthesis.
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The biological species concept cannot be applied to fossils. Which alternate approach to identifying species would be most useful for classifying fossil organisms? A. an approach based on genetic history B. an approach based on molecular biology C. an approach based on measurable physical traits D. an approach based on use of reproductive barriers
Answer:
C . an approach based on measurable physical traits
Which of the following is not a function of the human skeletal system?
a. Fatty acid storage
b. Primary glycogen storage
c. Protection of organs
d. Calcium storage
NEED IT ASAP!!! Which statement about the specific immune response is FALSE?
Clonal selection creates short-lived effector cells to destroy the specific antigen.
Clonal selection produces memory cells that are long-lived and can recognize the antigen in the future.
It takes about two weeks for memory cells to respond to an antigen.
The maximum response from effector cells takes about two weeks after the first time the body has been exposed to an antigen.
Memory cells divide to produce effector cells when they are exposed to their specific antigen.
Answer:
The answer is: Clonal selection produces memory cells that are long-lived and can recognize the antigen in the future.
Explanation:
Which type of fracture usually requires surgery?
*Hip fracture correct
Answer:
b. Hip fracture
Explanation: is correct
glial cells that surround the neurons in ganglia are:
Answer:
Explanation:
Satellite cells are small glia that surround neurons' sensory ganglia in the ANS. These resemble the astrocytes of the CNS and assist in regulating the external chemical environment. PNS satellite glia are very sensitive to injury and may exacerbate pathological pain.
Glial cells surrounding the neurons of neurons are satellite cells.
What are the functions of glial cells?Glial cells are a type of cell that provide physical and chemical support to neurons and maintain their environment. Located in the central nervous system and peripheral nervous system.
Glial cells outnumber neurons in the brain and outnumber them by a ratio of 3:1. Although glial cells also have complex processes extending from their cell bodies, they are generally smaller than neurons and lack axons and dendrites.
Oligodendrocytes form the myelin sheath around axons. Astrocytes supply neurons with nutrients, maintain their extracellular environment and provide structural support. Microglia clear pathogens and dead cells.
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Those who argue that biology and genetics have the strongest influence on development emphasize ________.
Those who argue that biology and genetics have the strongest influence on development emphasize nature.
What are the influence of the nature in the development?The natures refers the hereditary factors or genes of the child.It helps in building a child's personality traits.It also defines the child's physical appearance.The biology influence development by the gene. One gene cane interact with other gene and environment in which some dominantThe biologically determined characteristics (nature) includes certain genetic diseases ,eye color, hair color, and skin color. The other things are also includes like life expectancy and height but it is also depends upon environment and lifestyle of individual.
The biological factors which includes genetic influences , brain chemistry, hormone levels, nutrition and gender.
The five different forces the influenced human evolution like nature selection, random genetics drifts, mutation, population mating structure and culture.
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Imagine looking through a microscope at a squashed carrot root tip. The chromosomes of many of the cells are plainly visible. In some cells, replicated chromosomes are aligned along the center of the cell. These particular cells are in which stage of mitosis
Damage to the capillaries throughout the body can directly cause which problem?
A
Inability of the body to absorb nutrients from food
B
Inability of the body to send oxygen to tissues
C
Inability of the body to release food energy
D
Inability of the body to receive information from the legs
.
Answer:
B. Inability of the body to send oxygen to tussues
What is the difference between structural and compositional layers of the Earth's
interior?
Answer:
The Earth has different compositional and mechanical layers. Compositional layers are determined by their components, while mechanical layers are determined by their physical properties. The outermost solid layer of a rocky planet or natural satellite. The Earth has an outer core (liquid) and an inner core (solid).
Explanation:
hope this helps and have a great day
One way that antibiotics can treat bacterial disease without harming human cells is by:
what plant cell organelle performs photosynthesis?
When a nerve impulse reaches the end of an axon of a neuromuscular junction, calcium flows ______ the synaptic knob.
Answer: flows INTO the synaptic knob.
When a nerve impulse reaches the end of an axon of a neuromuscular junction, calcium flows into the synaptic knob.
In a neuromuscular junction, there are three parts. They are the presynaptic terminal or synaptic knob, the synaptic cleft and the postsynaptic terminal. The calcium ions will work in the synaptic knob when the nerve impulse arrives.
Once that the nerve impulse reaches the end of the axon, it will affect the presynaptic terminal. In there, it causes the opening of voltage-gated calcium channels. As a result:
Calcium flows into the presynaptic terminal.The calcium makes the vesicles (with neurotransmitters) descend and fuse with the terminal membrane to release the neurotransmitters to the synaptic cleft.In conclusion, the nerve impulse causes the opening of voltage-gated calcium channels, and calcium flows into the synaptic knob.
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A major role of _________ receptors (part of the somatic nervous system) is to help us learn about the environment around us or about the state of our internal environment.
anyone help me? 1 number 2
Answer:
i dunno what class is this of, so tell me in the comment and I may rectify my answer according to that.
btw here u go
Explanation:
in q 1, part a, we need to tell what we observed in the growth of plants. we observed that the plant h was groing faster and healthier that plant g due to the fact that it was provided with a nutritive solution.
in its part b, we write the conclusion, i.e the plant which was provided with a nutritive solution grew more as all minerals required by the plants were replenished properly.
In q2, part a, we just compare their physical properties such as the plant g was not as healthy as plant h and plant h grew faster and taller than plant g.
in q2, part b, we just write what the solution is supplying the plant with, you can also check each one of their speciality on the web and write it also.
hope it helps
;)
Is alfalfa gmo? Yes or no
Answer:
Yes, I'm pretty sure it is. Hopefully, this helps.
Explanation:
Answer:
yee
Explanation:
what structures do human epithelial cells have in common with elodea cells
Answer:
They both have a cell membrane,nucleus and cytoplasm.
Explanation:
During a biology lab you are asked to look at an animal and
a bacterial cell under a microscope and document what
components they both share in common. Which of the
following is NOT a feature that all cells have in common?
1.Dna
2.cell membrane
3.cell wall
4.cytoplasm
Answer:
2. Cell wall
Explanation:
animals and some other organisms don't have cell walls, unlike plants (which has cellulose cell walls), bacteria (which has murein or peptidoglycan cell walls), etc.
How many codons are needed for 3 amino acids?
Answer:
3 codons are needed for 3 amino acids
Any Two adaptational Features of catus plant
Answer:
(i) It has long roots that go deep inside the soil for absorbing water.
(ii) Its leaves are in the form of spines to prevent water loss through transpiration.
What are the functions of guard cells?
Guard cells control the opening and closing of the stomata in plant cells.
WHAT ARE GUARD CELLS:Guard cells are structures that surrounds the stomata of plant cells and regulates the opening and closing of the stomata. The stomata, which are located on the leaves of plants opens in order for the plant to perform gaseous exchange i.e. intake of CO2 and release of O2.Therefore, Guard cells function to control the opening and closing of the stomata in plant cells.
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