To move, an animal must expend ____ to overcome the effects of ____ and friction
a. oxygen; respiration
b. muscle contractions; fatigue
c. nutrients; motion
d. glucose; movement
e. energy; gravity
e
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Guard cells
a. surround the stoma. b. control the opening to the interior of the leaf. c. become swollen when it becomes light, if environmental conditions are not too hot or dry. d. absorb water from surrounding epidermal cells. e. do all of these
Answer questions 67–71 in reference to the four groups of fungi
listed below. a. Zygomycetes b. Ascomycetes c. Basidiomycetes d. Glomeromycetes M 67. The common mushroom bought in the average supermarket is most likely a member of this group. D 68. Penicillium, the source of antibiotics, is a member of this group. M 69. The yeast used in the fermentation of grape juice to produce the wines of the world is a member of this group. D 70. The common black bread mold is a member of this group. M 71. The delicious, highly-prized truffle is a member of this group.
In science, the word "theory" ____
a. is an explanation that has not been published b. has essentially the same meaning as a prediction c. is based mostly on opinions d. signifies that a hypothesis has been tested and proven over a period of time e. means that a scientist has a hunch something is true
All the members of a single species that occupy a particular area at the same time are known as a
A. sub-population. B. gene pool. C. group. D. subspecies. E. population.