During which developmental stage is the human body plan set and organ formation occurs?
a. zygote
b. blastocyst
c. embryo
d. fetus
e. infant
c
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In general, microbial growth in the open ocean is most limited by the availability of ________.
A. iron B. manganese C. phosphorus D. nitrogen
Which of the following is TRUE about
asteroids?
a. they can be as large as 1,500 meters in diameter b. in our solar system, most are found between the orbits of Mars and Jupiter c. many cross the Earth’s orbit d. one of them impacted Earth as early as 50,000 years ago e. all of these are true
A patient who overdosed on heroin and is unconscious with slow, shallow respirations would MOST likely experience:
A) increased CO2 retention. B) acute metabolic acidosis. C) excess CO2 elimination. D) a pH well above 7.45.
Modern humans evolved about
(a) 200,000 years ago. (b) 2,000,000 years ago. (c) 2,000,000,000 years ago. (d) 4,600,000,000 years ago.