In meiosis, homologous chromosomes align next to one another during
A. prophase II.
B. prophase I.
C. metaphase II.
D. interphase I.
E. metaphase I.
B. prophase I.
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Which of the following statements concerning the relationship of energy expenditure to body size in animals is TRUE?
A. Large endotherms have higher mass-specific metabolic rates (O2/g tissue/hour) than small endotherms. B. Large ectotherms have lower mass-specific metabolic rates than small ectotherms. C. There is an inverse (i.e., negative) relationship between the TOTAL energy used by an animal and its body size. D. Only endotherms show an inverse relationship between specific metabolic rate and body size. E. Only ectotherms show an inverse relationship between specific metabolic rate and body size.
Which of the following is NOT characteristic
of cancer tissue?
a. retention of adhesion proteins b. increased vascular flow c. malformed cytoskeleton d. abnormal chromosome number e. all of these are characteristic of cancer tissue
A(n) ________ individual has the same alleles at the same locus on homologous chromosomes
Fill in the blank(s) with correct word
Which of the following toxins produced by Bordetella pertussis results in the accumulation of excess mucus in the trachea?
A) pertussis toxin B) adenylate cyclase toxin C) tracheal cytotoxin D) both adenylate cyclase toxin and tracheal cytotoxin E) both pertussis toxin and adenylate cyclase toxin