What is the meaning of mutualism?

I have this science test to do and need to study.

Which of the following is most likely to occur after construction of a dam? a. expansion of habitat b. decrease in turbidity c. loss of biodiversity d. increase in land temperature e. decrease in water temperature

Which is the function of the small vacuoles within an animal cell?

Which type of magma may be unable to form a volcano? A: andesitic magma B: tephra magma C:basaltic magma D:rhyolitic magma

Without the skeletal system, the body could not carry oxygen in the blood. a. True b. False

Nicotine from cigarette smoke acts as a ligand and associates with the acetylcholine receptor on specific cells in the nervous system. Nicotine eventually produces feelings of pleasure and well-being.

A. True b. False: the knee joint can rotate only when in a flexed position

Where would you mostly find terrestrial communities with temperature deciduous forests? A) India B) Alaska C) Europe D) South America

Besides A-B-O blood typing, what other characteristics of blood are used for identification?

What is significant about the male reproductive organ as it applies to internal fertilization?

How do fossils lend evidence in support of the Theory of Evolution?