Contrast oxygen levels in standing and running water ecosystems.

What organelle do both prokaryotic and eukaryotic cells have in common? What does it do?

State one advantage of using a stain to study frog skin cells with a microscope

Which event makes meiosis a reductional division and why?

What are the conditions necessary for a population to be at a Hardy-Weinberg equilibrium (or evolutionary equilibrium) ?

How are the cell walls of a plant and fungus different

Which route represents the path taken by the European explorer Christopher Columbus? A) 1 B) 2 C) 3 D) 4

Which gas is the most abundant of the trace gases? A. nitrogen B. oxygen C. argon D. carbon dioxide

Describe the central dogma of molecular biology, briefly describe the processes of transcription and translation.

magine that the animal body produced sperm and eggs with mitosis instead of meiosis. What chromosome number would the autosomes of the third generation have if the first generation had four chromosomes

A well supported testable explanation of phenomena that have occurred in the natural world is called