Which of the following is true of eukaryotes but not of prokaryotes?

a they must be multicellular
b they must contain a nucleus
c they are always single celled
d they do not have membrane bound organelles

Groups of organisms with low biotic potential, such as gray whales, that produce at most one offspring every other year a) are r-selected b) are k-selected c) are not subject to density-dependent limiting factors d) show the initial stages of the extinction process e) have escaped from the processes of natural selection and adaptation

What makes the results of a scientific experiment accurate? a) having multiple trials b) lacking any supporting data c) working in a lab d) using a hypothesis that is always true

Which of these statements are true about scientific theories and hypothesis