Put the following stages of primary succession in the proper order
A. bushes appear
B. ferns and grasses become established
C. glaciers retreat
D. lichens erode rocks
E. mosses appear
F. soil is present
G. trees are established
1. first event
2. second event
3. third event
4. fourth event
5. fifth event
6. sixth event
7. seventh event
ANS:1.
C
2. D
3. F
4. E
5. B
6. A
7. G
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In a relaxed skeletal muscle _____
A) thick and thin filaments overlap to the greatest extent possible B) sarcomeres are at their shortest length C) calcium is released from the sarcoplasmic reticulum D) the Z lines are farthest apart
An autosomal recessive disorder
a. requires that only one parent be a carrier. b. displays its symptoms in heterozygotes. c. is more frequent in males than females. d. requires that both parents are carriers. e. only affects females.
The first successful land plants, even though they lacked vascular tissue, were the
A. mosses. B. coniferous trees. C. ferns. D. liverworts and hornworts.
If you tracked an individual X chromosome from a male to his first generation offspring, then to his second generation offspring, what pattern would you see?
A. His X chromosome would be found only in his daughters and granddaughters. B. His X chromosome would be found only in his sons and grandsons. C. His X chromosome would be found only in his daughters and grandsons. D. His X chromosome would be found only in his daughters, then in both his granddaughters and grandsons. E. His X chromosome would be found only in his sons, then in both his granddaughters and grandsons.