Aerobic respiration occurs in
A) anaerobic sludge digestion.
B) primary sewage treatment.
C) secondary sewage treatment.
D) tertiary sewage treatment.
E) water treatment.
C
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Carriers
A. may have a persistent infection. B. may be a source of infection. C. usually show symptoms of the disease. D. have been cured of the infection. E. may have a persistent infection AND may be a source of infection.
The immature male gametophyte of seed plants is called a(n) ____
a. sporopollenin b. ovule c. seed d. strobilus e. pollen grain
The continuous release of mucus by the epithelial cells lining the respiratory tract is an example of
A) regulated secretion. B) constitutive secretion. C) the mucus response. D) clathrin-coated pit formation. E) phagocytosis.
Why is it essential that meiosis produce haploid cells?
A. so that the number of chromosomes will double each generation B. to produce haploid offspring C. to prevent the number of chromosomes from doubling each generation D. to produce diploid gametes E. to allow asexual reproduction