What are genes?

a. hormones that affect personality

b. units that determine traits

c. different forms of alleles

d. different forms of chromosomes?

The seed coat's most important function is to provide a) a nonstressful environment for the megasporangium. b) the means for dispersal. c) dormancy. d) a nutrient supply for the embryo. e) desiccation resistance.

At which location in earth’s interior does the top density continue to increase as thickness decreases?

What is the ecological role of food chains and food webs