Which group evolved first?
skates
chimaeras
rays
sharks

Identify which gland in the endocrine system is involved in each dysfunction and explain the effect of hormonal imbalance that was observed. 1.dwarfism 2.gigantism 3.goiter

Whay is the following best defines climate

Ascientist separates a population of mice into two groups. what would most likely increase the rate of speciation in this population. a. teach the two groups different tricks b. allow the two groups to breed with each other c. put the two groups in different environment d. have the two groups live in identical ecosystems