The following are parts of the lymphatic system. Which is NOT responsible for making white blood cells?
A. bone marrow
B. lymph nodes
C. thymus
D. spleen

Explain the importance of producers, primary consumers, secondary consumers. and decomposers in an ecosystem

What kind of seafood would you expect to have the highest levels of mercury and why? kelp, because they use the sun to photosynthesize on the bottom trophic level. oysters, because they filter feed on plankton on a lower trophic level. small fish, because they eat plankton on a higher trophic level. sharks, because they feed on organisms on a higher trophic level.

After fertilization, which type of cellular division is responsible for the growth and development of a complex, multicellular organism?