For a human baby to be born a boy he must receive
a. an x chromosome from the father.
b. a y chromosome from the mother.
c. a y chromosome from the father.
d. both an x and a y chromosome from the father.

The model illustrates a process by which a substance is taken up by a cell

Looking at this image, what relationship can be drawn from it? the lower the degree of latitude, the lower the degree of temperature there is no relationship between latitude and temperature the higher the degree of latitude, the higher the degree of temperature the lower the degree of latitude, the higher the degree of temperature

Explain in your own words what caused pangea to separate and why we don't worry about earthquakes in florida.