The Boundary Waters Canoe Area (BWCA) is an example of which biome?
A. boreal forest
B. tropical rainforest
C. short grass prairie
D. tundra
E. temperate rainforest
Answer: A. boreal forest
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The only lymphatic organ with afferent lymphatic vessels is the _____.
What will be an ideal response?
Who is/are the common ancestor (s) of individual IV-1?
a. I-1 b. I-1 and I-2 c. I-2 d. I-2 and I-3 e. I-1, I-2 and I-3
Which unit of measurement is most commonly used for expressing cell size?
a. centimetre (cm) b. decimetre (dm) c. micrometre (µm) d. millimetre (mm)
Refer to the paragraph on the effects of estrogens in the environment. What is the significance of using the concentrations of 5, 25, and 100 ng/l of 17?-estradiol for the dose in this experiment?
A) These concentrations are similar to those found in many animals. B) These concentrations are found in the environment. C) These concentrations are effective, yet not lethal to the fish. D) These concentrations are standard in toxicology assays.