Human Immunodeficiency Virus (HIV) is a virus that infects (and destroys) Helper T Cells. As a result, people who are HIV+ generally have a low number of these T Cells. How would the dramatic decrease in Helper T Cells caused by HIV affect a person’s immune response? Be specific using details from what you learned about the immune response.
Answer:
HIV invades various immune cells (e.g., CD4+ T cells and monocytes) resulting in a decline in CD4+ T cell numbers below the critical level, and loss of cell-mediated immunity − therefore, the body becomes progressively more susceptible to opportunistic infections and cancer.
HIV infects and deletes CD4+ T cells that normally coordinate the adaptive T- and B-cell response to defend against intracellular pathogens. The immune defect is immediate and profound: At the time of acute infection with an AIDS virus, typically more than half of the gut-associated CD4+ T cells are depleted, leaving a damaged immune system to contend with a life-long infection.
To ensure renewable energy resources, government regulations require logging companies to replant trees after they clear-cut a forest. why is clear-cutting still a concern for the environment ?
When a car slams on breaks, a book in the seat of the car slides forward. What terms describes why that happens?
Answer: Newton's first law which states that, if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force.
A table with four organisms and their primary role in an ecosystem is shown.
Common Name
Role in Ecosystem
Kingfisher
Carnivore
Black fly larvae
Herbivore
Trout
Carnivore
Algae
Producer
Based on the table, which trophic pyramid is correct?
Answer:Each and every one of us have several roles. Organisms in a community play other roles too. An organism's role within an ecosystem depends on how it earn its nutrients. Organisms collect their nutrients in very different actions, so they have different roles in an ecosystem.
Explanation:
The food chain describes who eats whom in the wild. Every living thing—from one-celled algae to giant blue whales—needs food to survive. Each food chain is a possible pathway that energy and nutrients can follow through the ecosystem.
For example, grass produces its own food from sunlight. A rabbit eats the grass. A fox eats the rabbit. When the fox dies, bacteria break down its body, returning it to the soil where it provides nutrients for plants like grass.
Of course, many different animals eat grass, and rabbits can eat other plants besides grass. Foxes, in turn, can eat many types of animals and plants. Each of these living things can be a part of multiple food chains. All of the interconnected and overlapping food chains in an ecosystem make up a food web.
The producer, the algae, is found at the base of the pyramid, and the black fly larva (an herbivore) is found above it. On the third trophic level, there are carnivores such as the trout, and the kingfisher is on the fourth level.
What is the ecological pyramid?The ecological pyramid is divided into several types, including the pyramid of numbers, the pyramid of energy, and the pyramid of biomass, and the characteristics of the pyramid vary by ecosystem. The pyramid consists of producers at the basal level, which is the algae, and they produce most of the energy in the ecosystem.
The energy and food are then transferred to the second trophic level, the herbivore level of black fly larvae. The third level is the carnivore level (primary carnivore), where the trout eats the herbivore (black fly larva), and the fourth level is the kingfisher, where it eats the primary carnivore, which is the trout, and this results in the pyramid starting with a broad base of producers and eventually narrowing towards the apex.
Hence, the pyramid begins with a producer (algea), then the herbivore, then the trout, and finally the kingfisher.
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What length should the navel cord of a pig be cut?
Answer:
3-4 inches
Hope that helps!
Explanation:
Viruses contain a (blank), (usually a lipid membrane) and basic proteins.
Answer:cheese
Explanation:
describe the two main phases of the cell cycle
Answer: The cell cycle has two major phases: interphase and the mitotic phase (Figure 1). During interphase, the cell grows and DNA is replicated. During the mitotic phase, the replicated DNA and cytoplasmic contents are separated, and the cell divides.
Which sequence represents the normal blood flow in pulmonary circulation?
Show photo of pulmonary circulation
illustrate the cellular respiration pathway (using diagrams)
Answer: this is your explanation
Which of the following has not been shown to cause cancer?
A) sun
B) Radiation
C) viruses
D)salt
Answer:
Viruses
Explanation:
Viruses haven't been linked to causing cancer
C. viruses
Explanation:
salted or dried fish) have been linked to an increased risk of stomach and nasopharyngeal cancer.Viruses can lead to cancer by associating with host proteins, proliferating when the human immune system is weakened, and hijacking proliferating human cells. percentage 12% to 20%https://phet.colorado.edu/en/simulation/natural-selection
explain natural selection and how it was demonstrated in this lab(website)
Hello. It is not possible to access the website you are referring to, but I will try to help you in the best possible way.
Natural selection is the term created by Chales Darwin to compose a theory of biological evolution. According to this term, living beings that have characteristics favorable to their survival, in relation to the environment in which they live, are more likely to survive and pass these characteristics on to their descendants, while those that do not have these characteristics are more likely to die. .
An example of this can be seen in a population of lizards that live in environments with a lot of grass. According to natural selection, green colored lizards would have better advantages of surviving because they would be camouflaged in the grass and would not be seen by predators, unlike red lizards, which would be easily identified and captured by predators. therefore, the population of red lizards would decrease until it ceased to exist, while the population and green lizards would survive and generate other green lizards.
Which statement about the immune system is false?
Answer:
Can you please give the options because there are many questions to this?
Answer:
B. Lymph contains water and blood cells is the false statement.
Explanation:
have a nice day!
how will photosynthesis affect oxygen levels?
(also if anyone could help me with the rest of these answers, that would be great <3)
The process of photosynthesis positively affects the level of oxygen in the ecosystem. This is because oxygen is the byproduct of the photosynthesis mechanism along with the main product known as Glucose.
What is Photosynthesis?Photosynthesis may be defined as a process through which green plants and some photosynthetic algae synthesize their own food in the form of glucose with the help of carbon dioxide and water in the presence of sunlight.
The complete reaction of photosynthesis si as follows:
[tex]6CO_2+12H_2O[/tex] → [tex]C_6H_1_2O_6+6O_2+6H_2O.[/tex]With the help of this reaction, this is determined that if the rate of photosynthesis increases, the level of oxygen is positively affected which means it is also increasing. It is opposite to the process of cellular respiration which involves oxygen as a reactant.
Therefore, the process of photosynthesis positively affects the level of oxygen in the ecosystem.
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DNA is not useful during
A) replication
B)transcription
C) proteins synthesis
D) mitosis
Answer:
D. mitosis
Explanation:
I wade out the options dna is useful during protein synthesis because the dna controls the synthesis of proteins in transcription where mRNA is built on a DNA template and DNA replicate it self
How do biotic and abiotic factors contribute to the health of an ecosystem?
Answer:
A
Explanation:
GIVING BRAINLIEST!!!
Two environmental changes are described below:
Environmental change 1: Many small tree saplings are competing for sunlight on the forest floor.
Environmental change 2: Many bluebirds have become ill with the infectious West Nile virus.
Which statement is true about these environmental changes?
A) Environment change 1 is increased predators and environmental change 2 is climate change.
B) Environment change 1 is pollution and environmental change 2 is disease.
C) Environmental change 1 is reduced space and environmental change 2 is disease.
D) Environmental change 1 is reduced space and environmental change 2 is lack of food.
Answer: I would say answer C
Explanation:
The statement which is true about these environmental changes is that the Environmental change 1 is reduced space and environmental change 2 is disease. Thus, the correct option will be C.
What is Environmental change?Environmental change can be defined as a change or any disturbance of the environment which is most often caused by human influences and the natural ecological processes. Environmental changes are the effect of changes which include various factors, such as natural disasters, human interferences, or the animal interaction.
The statement which is true about these environmental changes is that the Environmental change 1 is reduced space and environmental change 2 is disease. This is because, in environmental change 1 the different species compete for resources and in environmental change 2 the species are affected with infectious virus.
Therefore, the correct option will be C.
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is cali good for lavender plants and why ?
In another one of Mendelssohn Experiments, he crossed the off spring. Two pea plants with purple flowers (Pp) were crossed.
Answer:
There will be a dominant and recessive trait that would be formed.
Explanation:
3 purple flowers would be dominant while 1 will be recessive.
Where do turtles go to stay warm?
The green pigment in the chloroplast that captures the sun's energy is
Answer:
Chlorophyll............
Select the correct answer from each drop-down menu. Covering glass E with plastic wrap prevents (oxygen/ carbon dioxide) from entering the glass so Jared can test whether (Aerobic/Anaerobic) respiration occurs.
Answer:
Covering glass E with plastic wrap prevents oxygen from entering the glass so Jared can test whether anaerobic respiration occurs.
Explanation:
#plato/edmentum gang
Hope this helps!!!
Please mark brainliest.
Respiration is the process of inhaling oxygen and exhaling carbon dioxide. Covering a glass prevents the oxygen to enter and can use to test anaerobic respiration. Thus, options 1. a and 2. b are correct.
What is anaerobic respiration?Anaerobic respiration is a process that uses electron acceptors to produce energy by breaking glucose or other sugar molecules. Unlike aerobic respiration, it lacks the use of oxygen for metabolic reactions.
This occurs in the absence of oxygen and occurs in the cytoplasm with the help of oxidizing substances like nitrate, fumarate, sulfate, etc. to produce less ATP compared to aerobic reactions of respiration.
Therefore, covering a glass prevents the entry of oxygen and can be used to observe the anaerobic respiration by some microbes.
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where are sand dunes most likely to occur
Answer:
mostly in deserts, and probably some beaches
How does the human heart interact with gravity
Answer:
Many parts of the cardiovascular system (including the heart) are influenced by gravity. On Earth, for example, the veins in our legs work against gravity to get blood back to the heart. Without gravity, however, the heart and blood vessels change – and the longer the flight, the more severe the changes.
PLEASE HELP (50 POINTS)
Choose 1-3 activities that you perform regularly and explain the role(s) that each organ system plays in each activity, as well as explain how organ systems work together to perform the chosen activities.
Examples of activities students might choose:
• Arts (drawing/painting, dance or music performance, acting)
• Athletics (exercises/workout routines, sports)
• Food/Culinary-related (cooking, eating different cuisines)
• Other hobbies (video games/TV)
• Other student choices?
Connections with your chosen activities may be:
• Direct – How are your chosen activities directly controlled/performed by different organ systems and processes in the body?
• Analogies – How are your chosen activities similar/analogous to different organ systems and processes in the body?
Athletics would be the easiest choice here
Sports are an active that takes up a lot of different organ systems. When running I use my muscular system and cardiovascular system the most. The cardiovascular system directly controls running because it helps prevent me from getting tired and worn out faster.
Hope this helps :)
What's the answer please?
the T allele contains a mutation that occured during DNA replication. It's probably a point mutation
Please help thank you
What are the causes of variations ? please explain thi also
Answer:
variation can be caused by mutation and other things
Explanation:
A mutation is a change that occurs in our DNA sequence, either due to mistakes when the DNA is copied or as the result of environmental factors such as UV light or cigerette smoke
➜ Following are the causes of variations:
Dual percentage: Offsprings inherit some features from mother and some from father. Hence no offspring will exactly resemble to either of the parent or each other.Mutation in gene or chromosomal pattern also causes variations. Why are there many, many more craters on the "outer back" side of the moon than there are on the "inner facing" side of the moon?
Answer: Due to the strong force of attraction of external objects like meteorites or rocks the outer surface of the moon is affected by the craters.
Explanation:
The asteroids, meteorites, comets, and other space bodies fly around the moon and when they hit the surface of the moon a crater is created as the moon has no atmosphere. Also, the size of the crater is larger than that of the size of the body. The inner surface of the moon also has a crater which is because of volcanic eruptions occurring inside the moon. The volcanic craters are the same as that of the impact so produced. The volcanic eruptions are not much frequent than the exterior objects hitting the moon so more craters are created on the outer backside of the moon.
Plant 2 is produced from plant 1. If the leaf cells of plant 1 have 56 chromosomes. How many chromosomes will be found in the leaf cells of plant 2
Answer:
Explanation:
Now, being completely identical to plant 1, plant 2 will have 56 chromosomes in it's leaf cells.
helpp me plz it would mean alot
Answer:
Codon
Explanation:
mRNA bases are grouped into sets of three, called codons.