What are reproductive cells called?

The earth's polarity has switched many times through history as evidence by what wh the earth clorets he has switched many times throughout history as evidence by what

How do you suppose living conditions differ between the country furthest along in the demographic transition compared to the country earliest in the transition? how would living conditions in these two countries affect both birth and death rates?

Abrown coat is recessive in labradors, while a black coat is dominant. if two hybrids are bred, what percentage of the offspring will have black coats? a. 25% b. 50% c. 75% d. 100%