Answer to Question #192477 in Genetics for joy

Question

1.   Approximately, how many mass extinction events occurred throughout the evolutionary history of animals?

A.   3

B.   4

C.  5

D.  More than 5

2.      Until recent discoveries suggested otherwise, animals existing before the Cambrian period were believed to be____?

A.     Small and ocean dwelling

B.     Small and no motile

C.     Small and soft-bodied

D.     Small and radially symmetrically

3.      Which of the following mechanism of change was brought by the exchange of genes during the process of meiosis that leads to the formation of new gametes that are different form its parent?

A.     Mutation

B.     Genetic drift

C.     Natural selection

D.     Recombination

Answer 1

1.5

2.Small and soft-bodied

3.Mutation