Answer:
<em><u>B) a segment of DNA that is the basic unit of heredity</u></em>
Explanation:
<em>What is a gene: </em>
<u><em>a segment of DNA that is the basic unit of heredity</em></u>
<em></em>
The correct answer is phenotype
The third trimester begins at B) seven months.
The first trimester: 1-3
The second trimester: 4-6
The third trimester: 7-9.
Answer: Natural selection occurs when one allele (or combination of alleles of different genes) makes an organism more or less fit, that is, able to survive and reproduce in a given environment. If an allele reduces fitness, its frequency will tend to drop from one generation to the next.
Explanation:
wash your hands first! don't keep food open! cook properly! and lastly... no stale food!!!!