Structures in an organism that have no current function are referred to as ____
a. homologous
b. vestigial
c. mutualistic
d. fossils
e. convergent
ANSWER: b
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The floral meristem in flowering plants develops from the shoot apical meristem, which usually produces leaves. Which floral part is NOT a modified leaf?
A) sepal B) carpel C) stamen D) pollen tube
When the F factor is integrated, all Hfr strains have the origin of replication functioning in the same direction
Indicate whether the statement is true or false.
In animal bodies, __________ detect stimuli and
send signals to an __________ such as a brain. Fill in the blank(s) with the appropriate word(s).
Which one of the following hormone pairs is antagonistic, in that they have opposing effects?
A) estrogen, progesterone B) epinephrine, norepinephrine C) glucagon, insulin D) oxytocin, prolactin E) thyroxine (T4 ) and triiodothyronine (T3 )