What is the main difference between a cell nucleus and a nucleoid?
a. size of the organelle.
b. arrangement of the cytoskeleton
c. movement of the flagella
d. presence or absence of a surrounding membrane

Which of the following is not a classification of marine organisms? a. benthos c. neritic b. nekton d. plankton select the best answer from the choices provided a b c d

1. variations in a population of moths allow for some of its members to be able to adapt to environmental changes. the better adapted of the moths will be able to survive the change and thus prevail as the “fittest” of the species. (a) describe three mechanisms in which variation can occur within a species population. (b) explain which mechanism or mechanisms would be responsible for the survival of a population of peppered moths better than white moths in an environment affected by industrial soot. justify your answer.

Long-period comets come from the oort cloud particles in earth’s atmosphere material from the asteroid belt the kuiper belt