How does the life cycle of a grasshopper differ from the life cycle of a butterfly?
a. a butterfly life cycle does not include an adult stage.
b. a grasshopper life cycle does not include a pupa stage.
c. a butterfly life cycle does not include a larva stage.
d. a grasshopper life cycle does not include an egg stage.

The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-saharan africa than among those of african descent living in the united states. even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-saharan africa but absent in the united states. discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions.

Which conditions need to be in balance for cells to function? check all that apply. blood sugar food intake body water body temperature body mass

Plz ! a scientist wants to produce a cow that makes a particular human protein in it’s milk the desired protein causes blood to clot and can be used to treat hemophilia (a blood clotting disorder). which of the following would be best for the scientist to use? a. genetic crosses. b. cloning. c. selective breeding. d. genetic engineering.