A community differs from an ecosystem in that the former does NOT include
a. unicellular organisms.
b. decomposers.
c. abiotic (nonliving) factors.
d. unicellular organisms and decomposers.
e. unicellular organisms, decomposers, and abiotic (nonliving) factors.
C
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How many major branches are there on the evolutionary tree of life?
A. one B. two C. three D. six E. 12
An essential nutrient __________
a. is produced in high quantities in the body b. is produced in small quantities in the body c. must be obtained through the diet d. is a rich source of minerals
A(n) ____ is a single main root that is adapted for storage and typically grows downward and fairly deep
A(n) ____ is a single main root that is adapted for storage and typically grows downward and fairly deep A(n) ____ is a single main root that is adapted for storage and typically grows downward and fairly deep.
a. adventitious root b. fibrous root c. rhizome d. taproot e. tuber
The graphs above show data relating to seasonal differences in the amount of pigment molecules present in leaves and how this is related to leaves changing colors. What can you conclude from these graphs?
a) The amount of yellow-reflecting pigments has no bearing on leaf color. b) Green reflectance by leaves in the fall increases dramatically. c) The colors of leaves in the fall are a consequence of reduced amounts of chlorophylls a and b in the leaves. d) The colors of leaves in the fall are a consequence of increased amounts of chlorophyll a in the leaves. e) The colors of leaves in the fall are a consequence of increased amounts of carotenoids in the leaves.