There characteristics describe the of a cell
a. chromosomes
b. mitochondria
c. nucleus
d. ribosome

When proteins are being produced by a cell, scientist say that the genes are question 2 options: activated turned off replicated deactivated

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

Which of the following are not included as modern mammals that evolved during the eocene epoch? primates artiodactyls perissodactyls none of the above