Which of the following pathogens is spread by infected lice?
A) Borrelia burgdorferi
B) Plasmodium falciparum
C) Rickettsia prowazekii
D) Yersinia pestis
Answer: C
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Threatened species
A. are rare species that are exploited by humans. B. are species likely to become endangered in the future. C. are currently in danger of extinction throughout all or most of their range. D. will be extinct within 100 years. E. are found only in captivity.
Which of the following hormones is not produced by the anterior pituitary?
A. antidiuretic hormone (ADH) B. luteinizing hormone (LH) C. follicle-stimulating hormone (FSH) D. thyroid-stimulating hormone (TSH) E. adredocorticotropic hormone (ACTH)
The most common source of genetic variation in sexually reproducing organisms is
A. recombination of alleles through meiosis and fertilization. B. duplication of genes. C. duplication of chromosomes. D. mutation.
Which experimental modification would most effectively help to determine the sequence of reactions and reaction intermediates in the Calvin cycle?
A. Varying the amount of water the cells are exposed to B. Exposing the cells to 14CO2 for various time intervals C. Exposing the cells to radiolabeled O2 instead of 14CO2 D. Exposing the cells to alternating periods of light and darkness