D: needs to be present on both chromosomes to be expressed
Why: Because if there was a dominant trait present, then the dominant trait would overpower the recessive trait regardless of the matter.
D. Made of ash and pieces of rock rich in silica.
Should be your answer!
The purpose of the organs<span> of the </span>male reproductive system<span>is to perform the following </span>functions<span> To produce, maintain, and transport sperm </span><span> and protective fluid (semen) To discharge sperm within the female </span>reproductive tract<span> during sex</span>
There are 7 unifying themes in biology
1.Cell structure and function
2.Reproduction
3.Metabolism
4.Homeostasis
5.Heredity
6.Evolution
7.Interdependence
