Which changes will MOST likely have a negative effect on an ecosystem? A. creating a nature sanctuary
B. planting a tree
C. adding a freshwater source.
D. building a road

Does masterbation affect height growth or loss of growth hormone?

Acertain species of fish can have either long or short fins. the allele for long fins is dominant over the allele for short fins. a heterozygous, long-finned fish is crossed with a homozygous, short-finned fish. of the offspring, will have long fins and be , and will have short fins and be .

Q: a: in sexually reproducing animals, once fertilization of the egg takes place, the exists as a single cell until cell division begins