Over the past 50 years, the atmospheric level of carbon dioxide has
a. decreased.
b. increased slightly.
c. more than doubled.
d. stayed the same
C
Biology & Microbiology
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Further evolution of the protostomes changed the coelom by
a. losing it. b. reducing it. c. it becoming a pseudocoel. d. all of the above.
Biology & Microbiology
Which gas is increasing in the atmosphere and
intensifying the greenhouse effect? a. carbon dioxide b. carbon monoxide c. ozone d. nitrogen e. oxygen
Biology & Microbiology
During male ejaculation ____
a. smooth muscle of the vas deferens contracts b. prostate contractions are inhibited c. sperm are forced into the epididymis d. the seminal vesicles secrete fluids into the testes e. the bladder sphincter is relaxed
Biology & Microbiology
________ are lymphocytes that originate in the bone marrow but then mature in the thymus
Fill in the blank(s) with correct word
Biology & Microbiology