An organism with a chromosome number of n=7 is said to be haploid
a. True
b. False
ANSWER: True
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Absolute dating uses to estimate the age of a fossil.
A. radioactive isotopes B. embryonic structures C. structural features D. a molecular clock E. depth within rock layers
Which two factors affect how many gas molecules move across the respiratory surface in any given
time? a. moisture and transport proteins b. moisture and surface area c. partial pressure gradient and moisture d. partial pressure gradient and surface area e. transport proteins and surface area
The difference between an electrically neutral atom and an ion is that:a
an ion has an unequal number of protons and electrons, while an atom has an equal number. b. an ion has an equal number of protons and electrons, while an atom has an unequal number. c. an atom has an unequal number of neutrons and protons, while an ion has an equal number. d. an atom has its electrons in orbitals, while an ion has its electrons in its nucleus. e. an atom must have an equal number of neutrons and electrons, while an ion does not.
Organisms with pseudopods can surround other organisms and trap them in a ________ for digestion
Fill in the blank(s) with correct word