Answer:
HIV attacks helper T cells.
Explanation:
The correct answer is that HIV attacks helper T cells, while a cold virus infection does not. That is in Option D, as an HIV (human immunodeficiency virus) infection and a cold virus infection are caused by two different types of viruses.
What is HIV?HIV is a retrovirus, which means that it contains RNA as its genetic material instead of DNA. When the virus infects a host cell, it uses an enzyme called reverse transcriptase to convert its RNA into DNA, which is then integrated into the host cell's genome. This allows the virus to hijack the host cell's machinery and produce more copies of itself, which can then infect other cells in the body. One of the main targets of HIV infection is the CD4+ T cell, also known as the helper T cell. Helper T cells play a key role in the immune system by helping to activate and coordinate other immune cells, such as B cells and cytotoxic T cells.
Hence, the correct answer is that HIV attacks helper T cells, while a cold virus infection does not. That is in Option D.
Learn more about HIV here.
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Which strand is the shortest??
What volume percent of the liquid you skimmed into your test tube is oil? (show a ratio value if
you have it) ____________________________
How did you arrive at this answer? _________________________________________________
______________________________________________________________________________
Maybe once you start answering other people's questions correctly, you might get the answer that you want!
Best regards,
your friend
;)
Answer:
mhm
Explanation:
Question 6
Review
A mutation changes a gene in a cell in the stomach of an organism. This mutation coul
1.
both the organism and its offspring
2.
the organism, but not its offspring
3.
its offspring, but not the organism itself
4.
neither the organism nor its offspring
Submit Answer
Which of the following best explains how the fossil record provides evidence that evolution has occurred?
a. It shows that forms of life existed on Earth at least 3.5 billion years ago.
b. It shows the detail of structural and behavioral adaptations of organisms.
c. It shows how the embryos of many different vertebrate species are very similar.
d. It shows that the structure of groups of organisms have progressively changed over time.
Answer:
A It shows that forms of life existed on Earth at least 3.5 billion years ago.
Explanation:
AIt indicates that forms of life existed on Earth at least 3.5 billion years ago. It indicates the exact cause of structural and behavioral adaptations of organisms.
A new study in the Proceedings of the National Academy of Sciences that uses the latest techniques to date the most aged remains available, confirming the existence of bacteria and microbes nearly 3.5 billion years ago, possibly living on a planet without oxygen.
Hope this helps!
If you have any questions please ask.
A feeding strategy used by animals that strain their food and nutrients from the surrounding water.
A hunting
b siphoning
c filter feeding
d grazing
Answer:
I think it is D, grazing
Hope this helps
Two chemical equations are shown below.
maltose + water 4 glucose + glucose
fat + water B glycerol + fatty acids
What do letters A and B represent?
A) A - lipase; B - protease
B) A - protease; B - maltase
C) A - maltase; B – lipase
D) A - maltase; B - protease
Answer: C is the answer to this question.
Which of the following animals has a broad niche?
Sea slug
Protists in termites
Snowy owl
Raccoon
Answer:
raccoon
Explain
because raccoons can basically live anywhere and eat anything snowy owls cant live somewhere hot like in California. and I don't know what kind of termites your talking about
QUESTION 2
What organism is defined as a multicelled organism that develops through a series of stages and move
life?
O a archaea
Ob bacteria
c. fungi
d. animals
o e plants
Answer:
Animal
Explanation:
class 6 students come here I will give you notes class is started come here fast I am waiting come with your name and class girls i am also girl
Answer:
yes mam I am present in your class.
Can someone help me with this
Answer:
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choose a plant or animal that you think is interesting. describe some of the threats or challenges
Answer:
If I were to choose a plant or animal which is interesting, I'd choose the "cactus."
Explanation:
A "cactus" is truly a splendid plant owing to its ability to survive in the desert or periods of drought. Growing them is also not that challenging or difficult. However, this plant is prone to certain threats that may lead to its extinction.
One of these threats is the "over-collection of cacti." Due to its versatile use, the cactus is often sold as an ornamental plant. Another threat is the number of pests, such as snails and slugs, that attacks it yearly. It is a delicious food for mealy bugs, red spider mites, gnats, flies, etc.People often misunderstand the cactus' water level needs. Some people over-water the plant and this often results to the bacteria, virus and fungi being attracted to it.Water Hyacinth
Water Hyacinth grows profusely, forming dense mats that can spread across water surfaces eventually blocking the entire water body.
It can eliminate native wetlands and waterways and kill aboriginal fish and other wildlife.
Also, it causes a high evaporation rate and loss of water and degrades water quality.
What are the natural predators of the water hyacinth?
Water hyacinth is native to South America, the only continent where natural predators such as weevils and moths keep it at bay.
Thus, these are some of the threats or challenges of water hyacinth.
To learn more about water hyacinth click here:
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which of the following is NOT a macromolecule used by cells;
A( proteins
B( carbohydrates
C( lipids
D( nucleic acids
E( monosaccharides
Answer:
Monosaccharides
Explanation:
A monosaccharide is a monomer of a carbohydrate. Macromolecules are made up of monomers!
EMAI HTPC MER
correct arrange
Answer:
the correct is c
Explanation:
the question is in the photo.
Answer:
A.) Complementary to the corresponding mRNA codon
Explanation:
A.) is correct because the anticodon is what connects the tRNA to the mRNA. To form a bond between these sequences, they must be complementary.
B.) is incorrect because it describes the other end of the tRNA molecule.
C.) is incorrect because it is complementary to the mRNA strand, not rRNA.
D.) is incorrect because the anticodon does not change its sequence.
How does genetic variation allow a population to survive during environmental changes?
It allows natural selection and therefore increase or decrease in allele frequency that are already in the generation
Which dark solar feature is shown in the picture above?
Solar flare
Prominence
Sunspot
Corona
Answer:
corona is dark solar feature I think
Goodmorning, can someone please help me figure this out? Thanks
Answer:
Vacuole.
Hope this helps!
Explanation:
Compare how cells in unicellular and multicellular organisms perform the tasks needed for life.
Answer:
These organelles are responsible for a variety of cellular functions, such as obtaining nutrients, producing energy, and making proteins. Unicellular organisms are made up of only one cell that carries out all of the functions needed by the organism, while multicellular organisms use many different cells to function
Explanation:
How is a balloon like
a cell membrane?
Answer:
As the plasma membrane, the balloon is a SEMIPERMEABLE MEMBRANE. Semipermeable means that the membrane allows the movement of certain molecules across. Both in and out of the balloon.
State one reason
scientists would value an experiment that does not support the initial hypothesis.
Answer:
An experiment that does not support the initial hypothesis would prove that the scientists initial thoughs were incorrect thus needing further investigation and experimentations.
Explanation:
The loss of an organism at the bottom of a food chain negatively impacts all organisms in the chain.
Please select the best answer from the choices provided
Truth or false
Answer:
true
Explanation:
Why are the components of the electron transport chain embedded in the inner mitochondrial membrane rather than floating freely in the cytoplasm of mitochondrial matrix?.
Answer:
To generate and maintain the proton gradient essential for ATP production.
Explanation:
ATP is also formed from the process of cellular respiration in the mitochondria of a cell. This can be through aerobic respiration, which requires oxygen, or anaerobic respiration, which does not. Aerobic respiration produces ATP (along with carbon dioxide and water) from glucose and oxygen.
What are details/evidence of a Prokaryotes? please help and thank you.
Answer:
Prokaryotic cells are much smaller than eukaryotic cells, have no nucleus, and lack organelles. All prokaryotic cells are encased by a cell wall. Many also have a capsule or slime layer made of polysaccharide. Prokaryotes often have appendages (protrusions) on their surface.
using the passage which statement correctly describes the energy level of a group of organism
Answer:
Largemouth bass fish are tertiary consumers that receive the smallest amount of energy in the pyramid.
Explanation:
Where would you expect to find the most genetic diversity among humans?(This is a multiple choice question)
A. in city
B. in a town
C. in a family
Answer:
In a city
Explanation:
Your family all shares DNA, and towns are small and have fewer people and the lack of people leads to a lack of diversity.
Which of the following are ways humans have contributed to the rise in carbon dioxide in the lower atmosphere?
A. Through the burning of vehicle fuels
B. Through the use of fossil fuels in manufacturing
C. By clearing of the rainforest
D. All of the above
Answer:
it is D. all of the above
Explanation: all of these things contribute to rising carbon dioxide levels in the atmosphere
Answer: D. All of the above
What percentage of species who ever lived are still alive today?
20
15
10
5
1
Answer:
20 is the correct answer
Explanation:
Read this some where
Give an example of a protein for each of the functions of proteins.
(Support –Metabolism – Transport –Defense – Regulation – Motion)
Explanation:
Support- Actin filaments which allows movement of the cell surface.
Metabolism- insulin, which is small globular protein having two chains.
Transport- sodium-potassium pump, which is transport protein. It creates the gradient of ion that allows firing of the neurone.
Defense- Antibodies
Regulation- activator proteins that bind to regulatory site of the DNA
Motion- Actin filaments
How is the idea of PTT related to the
locations and distribution of volcanoes,
earthquake epicenters and mountain ranges?
Answer and Explanation:
The mantle is one of the four layers that form the earth. It is a very hot and dense rock, that is capable of flow. The crust is the outermost layer of the earth and is located just over the mantle. The crust is divided into many plates, that are able to move over the mantle.
The tectonic plates theory, PTT, is based on the continual movements of the crust and might explain the movement of the different plates, and their directions and interactions.
Plates are limited by three different ridges or borders that differ in the type of movement they produce.
Divergent limits: where two plates get separated, leaving a space among them that make a place for a stream of hot material that comes from the mantle to create a new seabed. This separation occurs because of the sea bottom expansion. As old plates get separated, the new and young crust instantaneously gets formed. There is never an open space left, because the emerging mantle occupies that place. This process occurs along with an underwater mountain range which is 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. These divergent limits are in general associated with the rocky material involved in the expansion of the seafloor.
Convergent limits: These movements occur when two plates collide. It might occur among two oceanic plates or one oceanic and one continental plate. In this last case, the oceanic plate is always the one that subducts. The thicker and older plate subduces under the other plate, and at this point, it starts the volcanic activity. As the thicker plate descends, it is heated and melted and its materials are incorporated into the mantle. As the older plate subducts, all the sedimental material that was on the surface of this plate, accumulate and incorporate into a wedge-shaped mass known as an accretion prism. The fast subduction and accretion prism formation make a place for magma that ascends to the surface by crevices. This produces the formation of the volcanic arches, located behind the accretion prism. If these arches are formed on the continental plate, these formations are known as continental arches. But if they occur in another oceanic plate, the arches are known as volcanic island arches. The volcanic islands are arranged in a circumference arch shape, which is bordered by a fossa. Subduction zones coincide with deep-sea trenches or depressions in the ocean bed. The Mariana Islands in the Pacific Ocean are examples of these volcanic islands. The Nazca plate is another example oceanic plate subducting under the south American plate and originating the Andes mountains.
Transforming limits refer to geological structures related to the seafloor expansion and associated in general with the oceanic ridge, although they might also occur in the continental plate. These limits are known as geological faults, where no rocky material is either destroyed or formed. When the plates move and one of the transforming limits displace 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.
I will give you brainliest
Answer:
2nd to view the cells of the skin