In Which generation are the parents purebred? In which generation are they hybrids?

In the diagram below, the northern hemisphere would be in what season at position a a.fall b. winter c.summer d.spring

What is the main function of the central vacuole in a plant cell? a. absorbs energy from the sun to produce food b. holds water and maintains turgor pressure c. breaks down molecules to release energy d. contains the cell's genetic material

The relationship between intron and exon