Which of the following is not a symptom of
premenstrual syndrome?
a. tender breasts.
b. headaches.
c. water retention.
d. irritability.
e. all of these
E
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A ____ feedback control system functions when a change in the internal environment triggers the body to oppose the
change and restore the normal environmental conditions.
a. positive b. physiological c. reflex d. negative e. anatomical
Mendel's second law of independent assortment has its basis in which of the following events of meiosis I?
A) synapsis of homologous chromosomes B) crossing over C) alignment of tetrads at the equator D) separation of cells at telophase
________ traits are often polygenic.
Fill in the blank(s) with the appropriate word(s).
The Golgi apparatus is responsible for the ________.
A. formation of mesosomes B. replication of chromosomes C. the assembly of ribosomes D. packaging of materials for excretion