Blood is pumped from the heart into the arterial system, which branches from arteries into fine ________.
A. veins
B. venules
C. arterioles
D. capillaries
Answer: C
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A population ecologist wants to estimate the size of a robin population. In an apple orchard, she captures 10 robins,
marks them, and then releases them. She returns several weeks later and captures another 10 robins, of which 2 are robins she previously marked. The estimated population size of robins is ____.
a. 50 b. 15 c. 10 d. 200 e. 20
Net primary productivity is greater in temperate grasslands than in tropical rain forest
Indicate whether the statement is true or false
The removal of introns and joining of exons in eukaryotic DNA, forming an mRNA molecule with a continuous coding sequence; Occurs before mRNA leaves the nucleus
What will be an ideal response?
All of the following are benefits of food irradiation, except
A. it can kill insects on the food. B. it can inhibit the sprouting of white potatoes. C. it can reduce the number of food-borne deaths each year. D. it can kill bacterial pathogens on the food. E. it makes the food less nutritious.