Decomposers are necessary in a food chain

because they

(1) manufacture food by photosynthesis

(2) return nutrients to the ecosystem

(3) absorb energy from the Sun

(4) produce organic nutrients

How large may an air mass be?

All but one of the girl's traits are determined by her chromosomes. that is

A healthy cell spends most of its lifetime in

When heating food in the microwave, it must reach a temperature of

A crime has been committed in a town of 100,000 inhabitants. The police are looking for a single perpetrator, believed to live in town. DNA evidence is found on the crime scene. Kevin's DNA matches the DNA recovered from the crime scene.

Many virues infect only a certain type of cell because they bind to certain

What can be bio-genetically grow tissues and organs

Whole muscles can respond in a graded fashion to stimuli by varying Select one: a. the force of contraction of individual muscle fibers. b. the number of motor units recruited. c. the amplitude of the action potential. d. the frequency of stimulus.

Why does the oxygen atom in water a molecule have a negative charge

What is continental crust and ocean crust composed of