What is the basic unit of structure and function of all living organisms?

mitochondrion

DNA

nucleus

cell

Which of the following characteristics does an arthropod have? segmentation endoskeleton jointed appendages notochord coelom tissues, organs, and organ systems

Research has highlighted the importance of what region of the brain in the process of dreaming?

How much of the earth's oxygen is generated by marine organisms?

decomposers 3 a diagram that shows the connections among food chains in an ecosystem 2. food chain 2 line of plants and animals that shows the order in which organisms are eaten 3. food web 5 related to or possessing motion 4.

A man goes swimming in a pond. As he swims, which reaction provides energy to power his muscles? ATP regenerates from ADP using energy in glucose. The ADP molecule adds a phosphate group and produces ATP.

When can a primary succession occur?

Friction between a skateboard wheel and the surface produces?

What are two functions of the cell membrane

Why can eukaryotes carry out more specialized functions than prokaryotes can? A) eukaryotes have more organelles B) Prokaryotes have more organelles C) eukaryotes are bigger D) prokaryotes are bigger

How might mendel's conclusions have differed if he had studied two traits determined by alleles carried on the same chromosome?