Answer:
D. Over fifty chemicals in tobacco are known to cause cancer.
Explanation:
Eating disorders like anorexia and bulimia can affect both boys and girls.
Any form of tobacco is dangerous.
Alcohol is definitely responsible for more than 10% of fatal automobile accident.
Answer:
All of the F1 progeny would be wild-type.
If the two mutations are in different genes, then we expect complementation to occur (each mutant strain provides a functional copy of the gene that is defective in the other strain) and wild-type progeny to be produced
If a restriction site is altered, a higher molecular weight band will be observed.
Restriction enzymes are proteins synthesized by bacteria to protect itself against foreign DNA. These enzymes cut DNA at specific places.
This enzyme is used to detect mutations in the genome, particularly those at the sites of action of these restriction enzymes. A healthy subject is compared with the patient who is supposed to have cystic fibrosis. If their DNA migration is different, it means that their DNA is different and that there is a mutation at the restriction sites.
Answer:
The correct answer will be option-C.
Explanation:
The race is a term used to denote the group of people who share common ancestors and descended from it. The groups are based on the physical appearance and social qualities as a result of adaptation and natural selection which led to the variation in the species of humans.
Although humans show variation, they all belong to the same species and same genus- Homo sapiens. The sapiens share 99% DNA as well they can successfully reproduce with each other which shows that they have descended from a common ancestor.
Thus, Option-C is the correct answer.
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