What effect did charles darwin’s theory have on biology?

Crossing over and independent assortment are important activities that occur during meiosis. what is the significance of these activities

The spermists believed that: the male made the only hereditary contribution to the offspring the male and female traits were blended in the offspring the female made the only hereditary contribution to the offspring the male and the female made equal contributions to the next generation

What is the most abundant vertebrate on earth?