A student encounters a pondweed which appears to be a charophyte (stonewort). Which of the following features would help the student determine whether the sample comes from a charophyte or from some other type of green alga?
1. molecular structure of enzymes inside the chloroplasts
2. structure of sperm cells
3. presence of phragmoplasts
4. rings of cellulose-synthesizing complexes
A) 1 and 3
B) 1 and 4
C) 2 and 3
D) 2, 3, and 4
D
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Compare the worldwide distribution of seabirds to that of marine reptiles. Which is more widely distributed at all latitudes? Why do you think this is so?
What will be an ideal response?
A whale belongs to the artiodactyls group of animals
Which of the following also belong to this group? a. pigs b. cows c. hippopotamuses d. deer e. all of these belong
About 180 liters of blood plasma is filtered into human nephrons per day and, of that amount, about 2-3 liters leaves the body as urine. Therefore, the percentage of plasma filtrate that leaves as urine each day is about ________.
A. 10-20 percent B. 0.5-1.0 percent C. 1-2 percent D. 20-50 percent E. 0.1-0.2 percent F. 5-10 percent
The role of organisms in impacting the external environment:
a. is the process of niche construction. b. can feed back into evolutionary processes. c. is evident when investigating fire ecology. d. All of the above. e. A and C.