In some arthropods tagmatization has produced a combination of head and thorax known as a
A. larval instar.
B. thoracotomy.
C. cephalothorax.
D. headless mite.
E. fused corpora.
Answer: C
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_____ is the process through which a tumor supports its growth by creating its own blood supply.
a. Metastasis b. Angiogenesis c. Neoplasm d. Malignant tumor
Which antibody is concentrated in the respiratory tract?
A. IgD B. IgG C. IgA D. IgE E. IgM
How can a mutation in a tumor-suppressor gene behave as a recessive allele at the cellular level, but appear as a dominant allele in pedigree analysis?
A) Some functional protein can still be produced in a cell heterozygous for a loss-of-function allele; however, an additional mutation can inactivate the second allele, eliminating all functional protein allowing cancer to occur in many family members. B) A single functional allele is sufficient to regulate the cell cycle, but not sufficient to promote apoptosis, allowing cancer to develop in every generation. C) A cell with half the amount of the functional tumor-suppressor protein can form benign tumors that will occur in every generation in the pedigree. D) Some functional protein can still be produced in a cell heterozygous for a loss-of-function allele; but loss-of-function tumor-suppressor alleles are so common in the population that many individuals are homozygous.
The __________ is a word added to the genus name to identify which one of several species within the genus we are discussing.
A. specific epithet B. scientific name C. family D. subspecies