Sixteen percent of the human population is known to be able to wiggle their ears. this trait isdetermined by a recessive gene. what percent of the population is homozygous dominant forthis trait?

a) 16%
b) 40%
c) 60%
d) 36%
e) 48%

Robert wants to know which fertilizer will work the best for his grass. what can he do to explore this inquiry?

Ialready know the answers to these questions and they are on the attachment. but i just need to know why that answer is the correct one. plz asap! this is for a report that i need to email by 10!

Which is a genetic engineering advancement directly related to a career in biotechnology? 1) improving solar energy collection 2) transporting textiles at higher rates 3)creating crop foods that resist insect pests 4)repairing historical sites with quality materials