Two species of phorid flies are being used to control
fire ants. The fly
a. is a parasitoid of the fire ant.
b. lays an egg in the ant’s soft internal tissues.
c. produces a larva that eats the ant’s interior.
d. larva uses the ant’s empty head as a
metamorphosis chamber.
e. fits all of these descriptions.
Answer: e
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Mendel kept detailed records of the genetic traits of parent plants and their offspring plants. Among observations, he found that some traits would be expressed, whenever one particular allele was present, and called this allele Select one:
a. homozygous. b. dominant. c. recessive. d. homologous. e. heterozygous.
Nondisjunction of the XY pair during the first meiotic division can produce sperm with 2 X chromosomes and 2 Y
chromosomes. _________________ Indicate whether the statement is true or false.
Abscesses, ulcers and cellulitis are generally caused by bacteria.
a. true b. false