Because for the strands to form a double helix the base pairs have to match perfectly (adenine with thymine and cytosine with guanine) in DNA , and if a strand of RNA is paired with a split strand of DNA it goes adenine with uracil and cytosine with guanine (uracil replaces thymine)
<h2>Answer:</h2>
Chromosomes are structures present in the nucleus of the every organism's cell and it is the DNA packed with histones proteins.
Explanation:
DNA deoxyribo nucleic acid is the nucleotide sequence which is the blue print of the structural and functional characteristics of the whole organism.
Nucleus of the call is very small to be contain the DNA of cell. So DNA is present in the condense form by wrapping around the histones proteins which is known as cell division.
At the time of cell division, it is present in chromosomal form to equally divide the genetic material.
Repeated exposure to radiation can increase the risk of cancer.
<h3>What is cancer?</h3>
- A set of illnesses known as cancer involve abnormal cell proliferation and have the ability to invade or spread to different bodily regions.
- In contrast to this, benign tumors do not spread.
- A lump, unusual bleeding, a persistent cough, unexplained weight loss, and a change in bowel habits are all potential warning signs and symptoms.
- These signs of cancer may be present, but there may be other causes as well.
- Humans are susceptible to over 100 different malignancies.
<h3>What are the four primary cancer types?</h3>
- Carcinomas. The skin or the tissue that covers the surface of internal organs and glands is where a carcinoma first appears.
- Sarcomas. The tissues that support and bind the body give rise to sarcomas.
- A cancer of the blood is leukemia.
- Lymphomas.
Learn more about cancer here:
brainly.com/question/8590464
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Condensation occurs in the atmosphere, which is D. Think about water vapor. Since water vapor is part of the air, so that means that condensation occurs in the atmosphere.
Vocab:
Condensation - Is the change of the water vapor into the water, or overall the change of water from its gaseous form to liquid form.
Hope this helped!
Does not affect organisms within an ecosystem
