Prokaryotes account for roughly half of terrestrial photosynthesis
A. false
B. true
A
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The plasma membrane regulates the passage of all raw materials, waste, and energy sources into and out of the cell
a. true b. false
Contemporary hypotheses concerned with the origin
of life focus on what two characteristics of living systems? a. energy conversion and biosynthesis b. self-replication and energy conversion c. plasma membranes and self-replication d. growth and development e. adaptation and responsiveness
When a concept has been tested repeatedly and appears to be a uniform or constant fact of nature, it is called
A. empirical evidence. B. a hypothesis. C. a deduction. D. a law.
Which structure of the male reproductive system is also part of the urinary system?
A. testes B. urethra C. bulbourethral gland D. vas deferens E. prostate gland