Which best describes the sex chromosomes in humans? A. Females have one X and one Y chromosome. B. Males have two Y chromosomes. C. Males have two different chromosomes. D. Males have two X chromosomes.

Which of the following accurately describes carbon atoms? A. Carbon atoms only have three electrons available for bonding. B. When carbon atoms bond to other carbon atoms, they can only form triple bonds. C.

Which of the following is not involved in the formation of blood clots? A. the release of clotting factors from platelets B.

Which of the following eukaryotic gene regulatory mechanisms acts after transcription has occured? Select one: a. changes in transcription regulatory structures b. differential splicing of RNA transcript c. assembly of basal transcription d.

Tobacco mosaic virus (TMV) has been found in virtually all commercial tobacco products. Why, then, is TMV infection not an additional hazard for smokers?

Can elements can be reduced to simpler substances with the use of special chemicals?

If rats are allowed to wander through a complicated maze, they will subsequently run the maze with few errors when a food reward is placed at the end. their drastic change in performance once given a reward describes

Favorable changes in species get passed down through the generations because of

The most common form of aggression seen in animal hospitals is

What is the term referring to the type of reaction occuring when complex molecules are formed from simpler molecules and water is removed

Which of the following factors does NOT limit population growth? a. species c. space b. carrying capacity d. food