Dinosaurs where the dominant animals, so the answer is true.
Explanation;
The Mesozoic Era lasted more than 180 million years. Throughout this time, many contemporary forms of plants, invertebrates, and fishes developed. On land, dinosaurs were the dominant animals, while the oceans were populated by large marine reptiles, and Pterosaurs ruled the air.
If grey feathers is a recessive trait, then 72.8% of the population is heterozygous for this trait.
Explanation:
The concept used here is of Hardy Weinberg principle, 
+2pq =1
The homozygous dominant genotypeis represented as 
= 84
Red = dominant
The homozygous recessive genotype trait is represented as 
= 16
grey = recessive
2pq = heterozygous individual
Thus for dominant homozygous the alleles are given as
p= 
= 9.1
q = 
= 4
for heterozygous individual 2pq
2 x 9.1 x 4
= 72.8
72.8% population is heterozygous for the trait.
The correct answer is option A. Carrying the genetic code and determining an organism's structure and function are the functions of DNA. It is the hereditary material in almost all other organisms. The information in a DNA is stored as codes that is composed of chemical bases.
A - has a low diversity of genes therefore they are having issues w the breed not becoming strong but instead weaker
<span>The answer to that is the scrotum.</span>
