When the sperm nucleus combines with the egg nucleus, what is formed

In every physical or chemical change, energy cannot be created nor destroyed. This is the ________ law of thermodynamics.

Fill in the blank(s) with the appropriate word(s).

Phrenology and craniometry are no longer considered valid methods of studying intelligence. Indicate whether the statement is true or false

Which of these traits are explained by convergent evolution?

A) sickle-cell anemia in areas where malaria is common B) light skin color in many northern populations C) short stature in natives from the island of Puka Puka D) red hair among people of Irish descent

The group of protozoa that have flagella are the

A. Ciliophora. B. Mastigophora. C. Apicomplexa. D. Sarcodina.