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yarga [219]
3 years ago
8

Which of the following is a part of the cell theory?

Biology
1 answer:
Neporo4naja [7]3 years ago
6 0

Answer:

The correct option is D. New cells are produced from existing cells is a part of the cell theory.

Explanation:

Cell theory can be described as one of the earliest theories of biology which states that cells are the basic unit of life out of which all living things are made. The modern cell theory comprises of three main parts:

  1. All the living forms of life are manufactured from cells.
  2. Cells are the main unit which are involved in properly organizing a living organism.
  3. New cells arise from pre-existing cells.

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In some zoos, rare crosses between a male lion and a female tiger have produced hybrid offspring called ligers. male ligers are
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Answer:

Habitat isolation

Explanation:

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How is HIV contracted, and what are the treatment options?
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I believe the correct answer is: HIV is spread during unprotected sex or through contact with infected blood; it cannot be cured, but early treatment can minimize the long-term consequences.

<h2>Explanation:</h2>

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<h2>Further Explanation:</h2>

The virus is enters the body through open wounds or surfaces such as the vagina or mouth where the skin is very thin and can tear. After penetrating the skin, it attaches to specific immune cells called CD8+ T-cells on points called receptors. It then enters the cell and replicates itself in the nucleus of the cell and as it goes out, it kills these immune cells making the person to have a weak immune system. The current drugs used called AntiRetroVirals (ARVs) such as the drug Zidovudin stops the virus from replicating thus reducing the total amount of virus in the body called the Viral Load. Some drugs target enzymes called proteases and reverse transcriptase that help the virus to replicate. This viral load is what is counted to estimate the total volume of HIV someone has in their body. Infected persons should use protection while having sex and also avoid sharing sharp objects to prevent transmission. They also need to take their medication to make them much more healthier in addition to taking proper balanced diets.

Level: High School

Subject: Biology

Topic: The Immune System

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Answer:

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Explanation:

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