In gymnosperms the female cones produce
a. ovules.
b. pollen.
c. ovules and seeds.
d. pollen and seeds.

In gymnosperms, the females produce ovules and seeds. The males produce pollen.

Ithink option a is correct because you cannot donate a different blood group than yours because it won't match.option a says betsy can donate to mark. they have the same blood group so donation can happen.

It allows water to resist freezing and thawing cycle.