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Delicious77 [7]
2 years ago
9

1. Which statement best describes chromosomes?

Biology
2 answers:
Arlecino [84]2 years ago
8 0

Answer:

A chromosome is an organized package of DNA found in the nucleus of the cell. Humans have 23 pairs of chromosomes--22 pairs of numbered chromosomes, called autosomes, and one pair of sex chromosomes, X and Y.

Explanation:

hope this is right for you.

Naddika [18.5K]2 years ago
3 0

Answer:

Statement 4

Explanation:

1 and 2 are obviously wrong because DNA holds genetic information and doesn't do cell respiration and chlorophyll is a protein not DNA.

3 is wrong because interphase is the first part of mitosis and the chromosomes haven't formed or separated yet.

4 is correct because chromosomes have DNA (and some proteins)

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Which of the following is a plant structure that aids in water retention?
harina [27]

Answer:

A

Explanation:

it holds water in the plant

4 0
3 years ago
How is HIV contracted, and what are the treatment options?
Katena32 [7]

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>

Human Immunodeficiency Virus is a type of virus which causes an impairment of the immune system of the person making them susceptible to diseases such as tuberculosis, influenza and any other disease that can exploit this opportunity. It is spread by a person coming into direct contact with infected bodily fluids such as saliva during deep kissing, semen during intercourse, blood after an accident or even fluids when sharing needles and syringes for drug addicts. There is no cure but the current form of treatment slows down the virus to prevent some consequences.

<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

4 0
3 years ago
Read 2 more answers
Rose quartz is pink and smoky quartz is gray. Which of the following statements is true?
meriva

The best way to identify a mineral is the color of the mineral. The color of the minerals with different impurities is different. The pink color of the rose quartz and the gray color of the smoky quartz indicates that they contain different impurities. The impurities are the main factor behind the color of any mineral.

Hence, the correct answer is 'Color is the best way to identify a mineral'.

4 0
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Gnesinka [82]
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cricket20 [7]
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