FSH, LH, and TSH all have a similar structure and are found in vertebrates and invertebrates alike. Therefore, they can be defined as
a. synonymous
b. adverse
c. identical
d. analogous
e. homologous

What are the two causes of density in deep current waters? a. salinity (how much salt) of the water and high temperaturesb. salinity (how much salt) of the water and low temperatures c. oxygen content of the water and high temperatures. d. oxygen content of the water and low temperatures