Birds in which the lower bill protrudes much farther than the upper bill are
a. jaegers.
b. skimmers.
c. puffins.
d. penguins.
e. herons.
B
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If a human cell has two Barr bodies then the genotype of the individual could be
A. XXXY B. XXXXY. C. XXY. D. XYY.
In proteins, nitrogen bases link covalently to ribose in DNA
Indicate whether the statement is true or false.
Which of the following relationships is correct?
a. insects: Malpighian tubules: urea as major nitrogenous waste b. annelids: protonephridia: ammonia as major nitrogenous waste c. freshwater fish: kidney: large volume of hypertonic urine d. sharks: kidney: large volume of hypotonic urine e. earthworm: kidney: ammonia as major nitrogenous waste
The accumulation of fluid at the site of a wound is the result of the secretion of:
A. neutrophils B. leukocytes C. histamines D. kinins