Isotopes of the same element differ from each other in the number of ____
a. electrons and protons
b. neutrons only
c. protons and neutrons
d. electrons only
e. protons, neutrons, and electrons
ANSWER: b
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The molecular formula for glucose is C6H12O6. What would be the molecular formula for a molecule made by linking three glucose molecules together by dehydration reactions?
A) C18H36O18 B) C18H32O16 C) C6H10O5 D) C18H30O15 E) C3H6O3
Epidermal cells secrete a coating called the ____ that protects the plant from water loss and attacks by
microbes.
a. cuticle b. protoplast c. stoma d. trichome e. bark
The brain is located in which body cavity?
a. cranial b. thoracic c. spinal d. abdominal e. pelvic
Which of the following hypotheses support the basic principle of the species-area relationship? Check all that apply.
A. Smaller areas have greater concentrations of resources then larger areas. B. Larger areas receive more colonists than smaller areas. C. Organisms are less likely to go extinct in larger areas than smaller areas. D. Large areas have greater habitat diversity than small areas.