Why are there limited levels of consumers? for example, apex predators are usually tertiary or quaternary consumers. why don’t we have many 5th, 6th, or 7th level consumers?

How had the study of mitosis affected scientists knowledge of cancer

The allele for curly hair is incompletely dominant. if a mother is homozygous for curly hair and the father is homozygous for straight hair, what percentage of the offspring will exhibit characteristics of both parents? 25 percent 50 percent 75 percent 100 percent

Select three sports that require participants to be highly fit before the beginning a: snowboarding b: skydiving c: rock climbing d: bungee jumping e: free diving f: hiking