An abundance of _____ in the atmosphere would have prevented the spontaneous assembly of organic compounds on early Earth
a. hydrogen
b. methane
c. oxygen
d. nitrogen
C
Biology & Microbiology
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Which of the following is the site where
mature sperm are stored? a. ureter b. urethra c. vas deferens d. bulbourethral gland e. epididymis
Biology & Microbiology
Four of the five answers listed below are stages of actual nuclear division. Select the exception
a. anaphase b. prophase c. interphase d. telophase e. metaphase
Biology & Microbiology
Simple eukaryotes that carry out oxygenic photosynthesis and reproduce by means of alternation of generations are known as
A. algae. B. fungi. C. slime molds. D. euglenids. E. arachnids.
Biology & Microbiology
A guild is composed of
A. populations with similar metabolic activities. B. microhabitats in a single location. C. a single species. D. microbiomes in a single zone. E. ecosystems.
Biology & Microbiology