Which of these is an abiotic factor of an aquarium ecosystem?

A.

algae growing on the glass

B.

gravel on the bottom of the aquarium

C.

plants growing from the gravel

D.

fish swimming in the water

Which physical characteristics are found on earth but not on the moon?

A recessive trait is expressed only in an individual who is (A) heterozygous. (B) homozygous. (C) haploid. (D) polygenic.

Which Statement About Dna Replication Is True? A. Prokaryotes Can Only Replicate Their Single Circular Chromosome In The Nucleus. B. Prokaryotes Only Have One Origin Of Replication To Initiate Replication. C.

Which groundwater contaminant contained in fertilizers and pesticides comes from farms? A. bacteria B. mercury C. nitrates D. sodium

Which of the following are found in BOTH plant and animal cells? A.) Vacuole B.) Chloroplast C.) Cell Wall D.) Nucleus

A by-product of hydrogenation is select one: a. trans fatty acids. b. triglycerides. c. cholesterol. d. monounsaturated fats.

Why is a question such as "What is the world's tallest mountain?" not a good scientific question? A. The answer can easily be looked up. B. No one is interested in that question. C. We cannot collect observations about it. D.

Where would you expect to find the simplest body plans?

Whole animal cloning produces a new offspring that is identical to

What is the important chemical that provides energy for cells to do work (like active transport) ?