Which of the following may occupy more than 90% of a mature plant cell's volume?
a. chromoplasts
b. the rough endoplasmic reticulum
c. the central vacuole
d. the nucleus
Ans: c. the central vacuole
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The extinction of the dinosaurs occurred rapidly as a result of a single cataclysmic event
a. True b. False
Approximately how long does the process of sperm formation take?
A) 24 hours B) 20 days C) 60 days D) 6 months
Which of the following is a chemical reaction that is also known as digestion?
A. phosphorylation B. dehydration synthesis C. acid-base D. hydrolysis
What is an example of observational learning?
A. A baby garter snake captures and eats a slug. B. A chick’s gaping mouth induces a feeding response in a parent bird. C. A European cuckoo hatchling pushes the host bird’s egg out of the nest. D. A male fruit fly waves his wings at a female fruit fly during courtship. E. A marmoset monkey mimicking another marmoset in successfully opening a container