Which of the following increases genetic diversity in sexually reproducing organisms. heterozygous crosses, crossing over, mitosis, dihybrid cross.

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.

Asap. this question is 100 points if you answer it question: describe the basic relationship between ocean depth and temperature seen in the graph

What type of appendages do sponges cnidarians roundworms annelids mollusks arthropods echinoderms and vertebrate have? jointed, not jointed, absent