Humans acquire their first microorganisms during ____.
A) fetal development
B) nursing
C) vaginal delivery
D) the first year of life
E) exposure to the air
Correct Answer:
Verified
Q2: _ may have been a source of
Q3: _, which probably evolved from infoldings
Q4: It is hypothesized that _ may have
Q5: The earliest cells most likely _.
A) were
Q6: Scientists hypothesize that _ served as a
Q8: Scientific evidence suggests that Earth had cooled
Q9: Until the early 1800s, scientists believed that
Q10: The appearance of _ on Earth due
Q11: Experiments like those performed by Stanley Miller
Q12: _ are dome-shaped structures composed of layers
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