Q: Shark teeth likely evolved from the jagged scales that cover their skin, called what? Choices: - heterotroph scales - hook scales - pinworm scales - placoid scales A:
placoid scales

(Question)
Q: A mitotic spindle forms from the centrioles and passes through the nuclear membrane, which remains intact. chromosomes attach to the mitotic spindle, which separates the chromosomes and does what? Choices: - manipulates the cell - migrates the cell - destroys the cell - elongates the cell A:
(Answer)
elongates the cell

Ques: Q: What is the force that slows down or stops motion? Choices: - resistance - tension - thrust - friction A:
Ans: friction

(Q).
Q: What is the key to the demographic transition? Choices: - higher birth rates - higher expatriation - higher death rates - reduced family size A:
(A).
reduced family size

Ques:Q: What is the property by which water molecules stick together? Choices: - plasticity - vitality - tension - cohesion A:

Ans:cohesion

Ques: Q: What organ has four ventricles, all of which developed from the original hollow space within the neural tube? Choices: - heart - liver - bladder - brain A:
Ans:
brain