The original source of energy for the pyramid is the
a) sun.
b) all photosynthetic organisms.
c) decomposers, not seen in the pyramid.
d) phytoplankton, which are photosynthetic.

Which strategy is an example of how companies may upgrade themselves to meet changing customer preferences? a.doing door-to-door sellingb.using billboards to advertise the productsc. making online shopping services availabled.giving discounts on products

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

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