Radially symmetrical animals have loose meshes of neurons that are called ____
a. nerve nets
b. brain nets
c. ganglia nets
d. nerve cords
e. cephalization nets
ANSWER: a
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If individuals move from one population to another, it may cause a shift in allele frequencies due to
a. genetic drift. b. directional selection. c. natural selection. d. mutation. e. gene flow.
How do lymph nodes aid in a cancer diagnosis?
What will be an ideal response?
Prolactin ____
a. stimulates and sustains milk production after childbirth b. stimulates labor and childbirth c. causes the development of breasts and other secondary sexual characteristics in the male d. acts in concert with FSH to produce milk e. has secondary effects on reducing the size of the uterus after birth
You have determined the base sequence for a gene from Felis catus (domestic cat) that you believe may be involved in feline leukemia
The nucleotide and probable amino acid sequences are similar to retroviral proteins that become embedded in the host cell membrane. You separate the membrane fraction of feline leukemia cell lysate from the cytoplasmic fraction. What technique could you use to determine if your protein of interest is present in the membrane fraction? A) affinity chromatography B) liquid chromatography followed by mass spectrometry C) Southern blot analysis D) two-dimensional gel electrophoresis E) liquid chromatography followed by mass spectrometry or two-dimensional gel electrophoresis