The matured sex cell which takes part in sexual reproduction is referred to as

A. gamete

B. fetus

C. embryo

D. zygote

The biome that is characterized with large herbivores, few and scattered fire resistant trees is

A. savanna

B. tropical rain forest

C. montane forest

D. desert

Red blood cells are also known as _________?

A. erythrocytes

B. thrombocytes

C. phagocytes

D. leucocytes

The joint between the femur and tibia is known as ________?

A. hinge joint

B. ball-and-socket joint

C. pivot joint

D. gliding joint

What is the primary function of cofactors?

A. To aid in enzyme function

B. To synthesize enzymes

C. To inhibit enzymes

D. To break down old enzymes

Use the diagram below to answer the question that follow:
The diagram represents a

A. hygrometer

B. Wind vane

C. Anemometer

D. rain gauge

Coloration of the eye is ______ variation

A. physiological

B. morphological

C. adaptive

D. recessive

Which of the following choices correctly describes the composition of the cell membrane?

A. contains only lipids

B. contains lipids and protein

C. contains lipids and cytosol

D. contains only proteins

The feeding relationship among a set of members of a community is referred to as _______?

A. a food web

B. pyramid of energy

C. a food chain

D. pyramid of number

Nitrogen is released into the atmosphere when ________

A. plants absorbs mineral salt

B. sugar is completely broken down

C. through plant uptake

D. when lightning strike