D: a nucleus
the prokaryote cell has no nucleus and for that matter no other membrane bound organelle
The appropriate answer is c. a tertiary consumers. Tertiary consumers are usually carnivores that eat other carnivores. The grass in the food chain is the primary producer. Primary producers are plants who get their energy from the sun. The grasshoppers are primary consumers or herbivores. The frogs are secondary consumers and they are also carnivores. A food chain shows how energy is passed on in an ecosystem.
Answer:
Vitamin B12 can be made from genetically modified bacteria
C. Thymine you can remeber by apples with trees
