Answer:
Answer is B.
Explanation:
<u>Period is duration of time</u>.
Period can be of a second,minute,hour or of Some years.We will give unit according to the duration of time.In the given options second is most obvious because it is used to measure time.
Genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).
Amino acids. Every protein is a long chain of amino acids.
The first one answer is to be increased and the second one answer is to be decreased
Answer:
B.
Explanation:
Because a Longitudinal wave is a wave vibrating in the direction of propagation.