Which is the most accurate description of an ecosystem?
a.) an ecosystem consists of a biological community—the physical and chemical factors—that make up its abiotic environment.
b.) an ecosystem consists of the biological community that occurs in some locale. c.) an ecosystem consists of the biological community that occurs in some locale and the chemical factors that make up its biotic or abiotic environment.

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

Ascientist is investigating the effects of salinity on fish development. he places fertilized fish eggs in an aquarium that contains low salinity and observes their development. what factor would improve experimental design the most? place the fish eggs in the open ocean because that is the natural habitat include another aquarium that has normal salinity to compare to the low salinity aquarium include an aquarium that replaces salt with sugar to confirm that the effects are specific to salt grow algae with the fish eggs in order to provide adequate nutrients to the developing embryos

Afeature in the early hominid was her apelike shoulders and forelimbs, but a pelvis that indicated that most of her body weigh lay above her pelvis, which best explains the fossil?