Tissues present during development of an organ but not found in the fully formed organ are removed
by
a. apoptosis only.
b. programed cell death only.
c. molecular signals received by receptors on marked cells only.
d. apoptosis and programed cell death.
e. apoptosis, programed cell death, molecular signals received by receptors on marked cells.
D
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The marine multicellular protists including the larger brown algae belong to the
A. dinoflagellates. B. Choanoflagellida. C. Stramenopiles. D. euglenoids. E. foraminifera.
Which of the following has only one living species characterized by fan-shaped, deciduous leaves?
a. Conifers b. Ginkophytes c. Cycads d. Gnetophytes
A lysosomal storage disease is caused by
A) failure of the cell to produce lysosomes. B) the inability to synthesize glycolipids. C) mutations in genes for lysosomic membrane proteins. D) an excess in the production of lysosomic digestive enzymes. E) mutations in genes that code for lysosomic digestive enzymes.
CH3-CH2-CH2-CH2-CH2-CH2-CH2-CH2-CH2-CH2-CH2-CH2-CH2-COOH is a(n)
A. fatty acid. B. amino acid. C. glycerol. D. steroid.