The organisms in a pond and the physical factors

influencing them best describe

(1) a population (3) a biosphere

(2) an ecosystem (4) a food chain

Bacteria contain all of the following except? A. nucleus B. ribosomes C. cell wall D. DNA

Why are stem cells important? A) They are incapable of becoming cancer cells. B) They have specialized DNA. C) They have the potential to develop into other cell types. D) They have the potential to undergo cell division.

Which of the following is not one of the agents of metamorphism? A) calcium rich liquids B) pressure C) heat D) chemically active liquids

Which of these is an example of land degradation? A. Containers designed to store pollutants leak. B. Fertilizers provide too many nutrients to crops. C. Garbage is buried so the land can be reclaimed later. D.

Why is a protozoan considered animal-like?

In order for an electrical message to be sent from the axon of one neuron to the dendrite of another neuron, it must transverse a space called the

Which object mos likely exerts the strongest gravitational pull on other objects

Which of the following is an inorganic compound? ammonia (NH3) glucose (C6H12O6) butane (C4H10) vinegar (C2H4O2)

Which type of fungal lung infection frequently results in productive cough with purulent sputum?

What effect does the buoyant force have on a submerged object?