The ABO blood type system in humans demonstrates es
sex-Linkage.
B)
multiple allelism.
9
incomplete dominance.
D)
complete integration.

the answer is: they occur when the sun, moon, and earth are aligned. in spite of their name, these tides occur twice a year in the spring and fall.

only about ten percent of the energy at one trophic level is passed on to organisms at the next trophic level. the remainder of the energy is used in life processes or lost as heat.