The correct answer is option A- HIV virus.
HIV virus is an example of enveloped virus, that has the ability to infect a host cell by attaching itself to it and fusing with the host cell. Once infected, the virus leaves the host cell and moves to another cells to infect them. The HIV virus contains glycoprotein spikes to attach to the host cell.
Answer:
Fusion powers stars and produces virtually all elements in a process called nucleosynthesis. The Sun is a main-sequence star, and, as such, generates its energy by nuclear fusion of hydrogen nuclei into helium.
Explanation:
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As their contents are used for energy during weight loss, fat cells get smaller in size, but their overall number doesn't change.
<h3>Where Does Fat Go When Weight Is Lost?</h3>
- Fats are liberated from fat cells and transferred to the mitochondria, the energy-producing organelles in your body's cells, by sustaining a steady calorie deficit. Here, a number of procedures break down the fat to create energy.
- These same cells may become smaller when you lose fat, yet they continue to exist in roughly the same numbers. Therefore, fewer fat cells, not more, are the main cause of changes in body form.
- Also implied by this is that even when you lose weight, fat cells are still present and can readily regain their original size if efforts are not made to keep the weight off.
To learn more about Weight loss refer to:
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Answer:
transcribe a message from a DNA molecule
Explanation:
"Memory Cells", are cells responsible for remembering what and how to fight off a specific pathogen. When a memory cell is produced for a specific pathogen, you are granted long lasting immunity.
