Explain why, for each pregnancy, human
parents have a 50 percent probability of having
a boy and a 50 percent probability of having a
girl.

Which image shows labeled organelles that are present only in plant cells?

What are the formed elements (cell or parts of cell) in blood and what are their functions ?

Pentane with molecular formula c5h12, exists in three isomeric forms. one shows linear carbon chains, another has one -ch3 groups present on the third carbon atom, and the third has two -ch3 groups present on the second carbon atom. what types of isomers are these? a. geometric isomers b. structural isomers c. halotropic isomers