Circle the letter of each structure that animal cells contain. chloroplasts
b. lysosomes
c. mitochondria
d. ER

Which statement about inheritance is true? o girls get most of their traits from their moms, boys get most of their traits from their dads. o male offspring will always have an x-linked genetic disease if the mom is a carrier o fathers always determine the gender of the offspring in humans. o males never have y chromosomes.

Why is excretion necessary to maintain homeostasis?

Can a trait be both polygenic and have multiple alleles? explain why or why not.