Which components of an atom do not have a
charge?
I. electrons
II. protons
III. neutrons
a. I only
b. II only
c. III only
d. I and II
e. II and III
C
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Which of the following is not true for both male and female gametogenesis?
A. Gametes develop in the gonads. B. Germ cells multiply by mitosis. C. Primary cells (spermatocytes and oocytes) are diploid. D. Gametes are formed by meiosis. E. One primary cell produces one mature gamete.
What term describes an exotic species that thrives in a new habitat and quickly threatens the existing environment?
a. a pest species b. a keystone species c. an advanced predator species d. an invasive species
Totipotent human stem cells can apparently be obtained only from:a
bone marrow. b. umbilical cords. c. cancer patients. d. zygotes. e. gametes
Which bone is not a part of the orbit?
What will be an ideal response?