Answer:
The correct answer is -
HIV viral load
HIV antibody levels
CD4 number
CD4:CD8 ratio
Explanation:
The doctor wants to check the current condition of HIV and its effects on the body of John and how are the medicines are helping. So he must be checking the viral load which means how much virus present in the blood. The level of antibodies gives the idea of antibodies produced by the body in response to infection with HIV.
The levels of CD4 cells are assessed as they are affected by the HIV virus along with CD8 cells. Antibodies are not produced against CD4 cells. Antibodies are generally for diagnosis only.
what do ribosomes do in animal cells
1. Mutations which arise from exposure to mutagenic agents are:
a. Agent mutations
b. Spontaneous mutations
c. Induced mutations
d. Point mutations
Answer:
Induced Mutations
Explanation:
Induced Mutations occur through exposure to a mutagen.During the relative refractory period, _______. During the relative refractory period, _______. another action potential can be generated provided the stimulus is relatively smaller than the original stimulus. another action potential can be generated provided the stimulus is large enough. the flow of potassium is also depolarizing the neuron. a second action potential cannot be generated, no matter how strong the stimulus.
Answer:
During the relative refractory period, another action potential can be generated provided the stimulus is large enough.
Explanation:
The relative refractory period is the time after an action potential where the sodium channels are transitioning from inactivated channels to closed ones. In other words, voltage-gated Na+ channels have two gates, an external one and an internal one. During repolarization, the outer gate is blocking the entrance, and the internal one is open. So the channel is inactivated. When the inner gate is closed, the Na+ channel is closed.
During the relative refractory period, a second action potential can happen, but the stimulus has to be large enough to do it since the membrane is hyperpolarized, that is to say, the membrane potential is more negative than the resting action potential. The cell needs more Na+ ions to produce the second action potential.
Replanting trees on a bare hillside is an EXAMPLE of
Answer:
Reforestation and restoration
Answer:
Reafforestation and restoration
hope it helps
introduced species often take over an ecosystem because they usually _____.
Answer: lack of predators
Explanation: Introduced species often take over the ecosystem because of the lack of predators that usually feed on them and keep their numbers in check.
Describe the rock cycle. Discuss what can happen to rock material within the
cycle and the amount of time it might take for rocks to be transformed.
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Answer:
The rock cycle is a constant transformation of rocks between the three rock types of igneous, sedimentary, and metamorphic. If the sediments are buried behind other layers of sediment, they can lithify and form sedimentary rock. When rocks melt, magma is formed. Rocks form deep below the Earth, move and sometimes change, rise to the surface, and eventually return to their original location.
What is the cause for a new trait this badger may exhibit?
A. DNA mutation
B. Natural selection
C. It's not possible to see a new trait if neither parent had it.
Which is associated with weak light rays that travel in different directions?
Answer:
"scattering" that would be the correct answer :)
Explanation:
hope it helps
what does the picture show??
Answer:
Population
Explanation:
An Organism would be 1 single mouse, a community encompasses multiple animals living in that same area, a niche has to do with where they are living and how they interact, so only the population makes sense.
What is evolution?
A. A change in the gene pool over time
B. Having a gene pool
C. Sexual selection
D. Natural selection
Answer:
A. A change in the gene pool over time
Explanation:
The evolution is the change in the gene pool over time. Therefore, the option (A) is the correct answer.
2. The movement of tectonic plates and the cycling of Earth materials are
the direct result of which of the following *
Nuclear fisson
Solar radiation
Thermal convection
Magnetic attraction
Answer :
Thermal convection
Explanation :
The heat from radioactive processes within the planet's interior causes the plates to move, sometimes toward and sometimes away from each other.
Answer:
Thermal Convection
Explanation:
Just trust me, it was on my quiz for stemscopes.
The reason it is called a Frameshift mutation is because it alters the "reading frame" of the bases. The bases are normally read as
A. codons, in groups of 3
B. nitrogen bases, in groups of 2
C. anti-codons, in groups of 4
Answer:
A. codons, in groups of 3
Explanation:
The reason it is called a Frameshift mutation is because it alters the "reading frame" of the bases. The bases are normally read as codons, in groups of 3.
codons, in groups of 3. The reason it is called a Frameshift mutation is because it alters the "reading frame" of the bases. The bases are normally read as codons, in groups of 3.
What are Codons?Codons are units of genomic information made up of three nucleotides (trinucleotides) in DNA or RNA that code for a specific amino acid or indicate the end of protein synthesis (stop signals).
There are 64 distinct codons, of which 3 serve as stop signals and 61 identify amino acids.
The messenger RNA is made using the DNA as a template, which is subsequently used to create a particular protein. The bases that make up DNA and the associated messenger RNA are called bases. These nucleotides are frequently identified in RNA by the letters A, U, C, and G.
Therefore, Codons, in groups of 3. The reason it is called a Frameshift mutation is because it alters the "reading frame" of the bases. The bases are normally read as codons, in groups of 3.
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Match the following vocabulary with the definitions.
1. Occurring in the presence of oxygen
2. The stage of respiration that occurs in anaerobic condition In animal cells
3. The first step in the chemical breakdown of glucose
4. Occurring in the absence of oxygen
5. The stage of respiration that occurs in anaerobic conditions In less complex organisms
lactic acid fermentation
anaerobic
alcohol fermentation
glycolysis
aerobic
Answer:
aerobic- 1. Occurring in the presence of oxygen
lactic acid fermentation- 2. The stage of respiration that occurs in anaerobic condition In animal cells
glycolysis- 3. The first step in the chemical breakdown of glucose
anaerobic- 4. Occurring in the absence of oxygen
alcohol fermentation- 5. The stage of respiration that occurs in anaerobic conditions In less complex organisms
Explanation:
Which of the following is a subsystem of an organism?Please explain and I give you 5 stars.
A.cell
B.organ system
C.tissue
D.all of the above
Answer:
D
Explanation:
In multicellular organisms, the body is a system of multiple, interacting subsystems. Subsystems are groups of cells that work together to form tissues. Interactions are limited to the circulatory, excretory, digestive, respiratory, muscular, and nervous systems.
Which of the following are the main components of an mRNA vaccine?
mRNA and B-Cells that recognize the coronavirus
mRNA and antibodies that can inactivate the coronavirus
mRNA and spike proteins from the coronavirus
mRNA only
Droughts occur due to climate change and elevated temperatures, which in turn may lead to other consequences as well. Imagine that a wildfire happened in the nature reserve. Predict what would happen if such an environmental shift that is so extreme and rapid
hits the nature reserve and the population of deer mice does not have time to adapt. Propose a possible solution for this problem.
Answer:
Research shows that changes in climate create warmer, drier conditions. Increased drought, and a longer fire season are boosting these increases in wildfire risk. ... Changes in climate add to these factors and are expected to continue to increase the area affected by wildfires in the United States.
amoeba sisters: nature of science
Answer:
The scientific mrthod is a process used by scientists to find answers to a question or to solve a problem. No there isn't just one because there are several versions of the scientific method. Some versions have more steps, while others may have only a few. Scientists can add steps, take out steps, revise, or make models.
The scientific method is a systematic approach used by scientists to investigate and understand the natural world.
It consists of a series of steps that guide the process of conducting scientific research and acquiring knowledge.
While there is a general framework for the scientific method, it is important to note that there is no single, universally accepted version of it.
The exact steps and emphasis may vary depending on the field of study, the specific research question, and the nature of the scientific inquiry.
Different branches of science may have their own specialized methodologies and techniques.
For example, the methods used in social sciences or qualitative research can differ significantly from those used in the natural sciences.
Thus, this is all about scientific methods.
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what are cells surrounded and protected by?
Answer:
cells are surrounded by a structure called the cell membrane — which, much like the walls of a house, serves as a clear boundary between the cell's internal and external environments. The cell membrane is sometimes also referred to as the plasma membrane.
Answer:
The plasma membrane, or cell membrane
Explanation:
What is respiration and the types of respiration
Answer:
Hey mate......
Explanation:
This is ur answer.....
Respiration is the process by taking in oxygen and liberating carbon dioxide from the oxidation of complex organic substances.
Three types of respiration include internal, external, and cellular respiration. External respiration is the breathing process. It involves inhalation and exhalation of gases. Internal respiration involves gas exchange between the blood and body cells....
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Javier investigated what happens when Earth's plates meet. He found that as Earth's plates meet at plate boundaries and interact, they move in three different ways. The ways they interact produce changes on land and on the ocean floor. What are the kinds of boundaries that plates form? Label each plate boundary with the correct type from the choices below.
Answer:
I. Divergent
II. Convergent
III. Transforming
Explanation:
The crust is the outermost layer of the earth. It is divided into many plates that move over the mantle. Nowadays, there are six different bigger plates and twelve that are smaller. These plates are limited by three types of ridges or borders that differ in the movement they produce.
Boundaries types:
I. Divergent: New crust is created by the rising molten materials coming from the mantle. Two plates separate, and the stream of hot material creates a new seabed between them. It occurs an expansion of the sea bottom. As old plates get separated, the new and young crust instantaneously gets formed. The emerging mantle occupies the space left by the separation of the two plates. This process occurs along with an underwater mountain range, known as the mid-oceanic ridge or divergent ridge. An example of this is the ridge located in the middle of the Atlantic Ocean, extending from Greenlander to the southernmost point of South America.
II. Convergent. Collision area between two plates. Two oceanic plates might collide, or one oceanic plate with a continental one. In this last case, the oceanic crust sinks under the continental plate, and magma rises to the surface by crevices. The thicker and older plate subduces under the other plate. The Himalayas and Los Andes are examples of these collisions. Also, collisions create volcanic arches and continental arches.
III. Transforming. The plates slide laterally with each other, and they are usually called faults. It is associated, in general, with the oceanic ridge, although it might also occur in the continental plate. No rocky material is either destroyed or formed. When the plates move and produce a displacement of one transforming limits from side to side, earthquakes occur. The movement breaks the crust and originates pronounced fractures. The San Andrés fault is an example of this plate ridges.
The kinds of boundaries that plates form is the fact that seismic activity takes place at the three known types of plate boundaries called divergent, convergent, and transform.
What happens when Earth's plates meet?If two tectonic plates meet, they create a kind of convergent plate boundary.One converging plates often shift or move below the other, in an act known as subduction.
The new magma (molten rock) tend to increase and may erupt to create volcanoes.
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True or False:
Glycolysis joins glucose to other molecules to make pyruvate.
Answer:
False
Explanation:
Glycolysis is the breakdown of glucose by enzymes releasing energy and pyruvic acid.
Answer:
False it breaks down glucose
Explanation:
What other major body system is a DIGESTIVE system working with closely?
Answer:
circulatory system
Explanation:
Where do you think the nutrients from the food that you eat go after digestion? The entire point of eating is to get energy and nutrients tot he other parts of the body and to do that you need the circulatory system.
(a) Describe why DNA replication is said to be a semiconservative process. Explain how random mutations such as those in pathogens with a mutator phenotype may arise in the DNA of an organism.
Explanation:
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sainyo
What are 3 reasons for exploring space? I
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Which of the following is an important process that takes place in an ecosystem?
thermodynamic process
data processing
decomposition process
cognitive process
Answer:
decomposing process is more important in an ecosystem
Answer:
Decomposition process
Explanation:
Decomposition process because when things decompose, there becomes more room for things to grow.
Also, have a great day or night where your at.
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How do plants make their food?
A. Photosynthesis
B. Digestion
C. Decomposition
Answer:
A. Photosynthesis
Explanation:
Photosynthesis is a process almost every plant goes through. The goal of the process is the create glucose, a sugar that can be turned into energy. Photosynthesis consists of 2 cycles: light-dependent and light-independent (aka Calvin Cycle). Photosynthesis requires carbon dioxide, water, and sunlight. These reactants can then be transformed into glucose and oxygen. Photosynthesis is the basis of energy for all animals.
Answer:
A. Photosynthesis
Explanation:
Plants make their own food by the process know as photosynthesis.
What are the living things that are best adapted to their environment will be more likely to survive
Answer: They are more likely to survive due to NATURAL SELECTION.
Explanation:
Adaptation of living organisms is the ability of these organisms to use its features which may by structural, physiological or behavioural to reproduce and survive in its environment.
NATURAL SELECTION plays an important role in the adaptation of organisms for survival. This is the process whereby the better fitted or adapted varieties of species in population are selected by environmental pressures. For example, a plant population in a region which had become drier climatically faces a water shortage problem not present previously. Among this plant population are a few individuals with a better developed root system and a thicker layer of cuticle. These individuals have a better chance of survival now because they can obtain a greater share of the limited water supply and reduce water loss from their surface more efficiently.
In the above example, the change to drier climate imposed an environmental pressure on the plant population. This affected the survival and reproduction of the individuals in the plant population in such a way that eventually a variety better adapted to the drier climate dominates the population.
What best defines gene flow
Explanation:
Gene flow is the exchange of alleles between two or more populations.
Gene flow is the exchange of alleles between two or more populations. For this reason it is sometimes referred to as allele flow or gene migration. While migrating animals often carry new alleles from one population to another, they must interbreed with the new population for gene flow to occur
Calculate during one year, the birth rate in a country is 28 births per 1000 people, and the death rate is six deaths per 1000 people what is the population growth rate?
Answer:
27
Explanation:
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Answer:
Deoxyribonucleic Acid [DNA]
Explanation:
DNA, is a complex molecule that contains all of the information necessary to build and maintain an organism.
viruses are a chain between living and nonliving beings . they are obligatory paracites and have either RNA or DNA .