Some internally fertilized eggs develop and hatch outside the mother's body. What is this developmental strategy called?
A. oviparity
B. marsupial development
C. placental development
D. vivipary
Answer: A
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Fish can exhibit behaviors that are directed to
(a) members of the same species. (b) members of different species. (c) nonliving constituents of the environment. (d) all of these choices.
The ________ is a complex network of interconnected filaments and tubules that extends throughout the cytosol, from the nucleus to the inner surface of the plasma membrane.
A) cytoskeleton B) microtubule apparatus C) cell scaffold D) desmin sheath E) microfilament array
The portion of the molecule in box 5 of Figure 12-1 is:
a. a hydrogen bond.
b. a phosphate.
c. a nucleotide.
d. a pyrimidine.
e. a protein.
Excessive utilization of fat for energy increases blood ______, which are organic acids.
Fill in the blank(s) with the appropriate word(s).