Which of the following is NOT an example of the
results of mitosis?
a. a pair of identical twins
b. a group of rooted plant cuttings from a single
plant
c. the cells produced by the asexual reproduction
of a single-celled organism
d. the offspring produced by two parents
e. healing of a wound
Answer: d
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Which one of the following is never found in prokaryotic cells?
A) flagella B) capsule C) cilia D) ribosomes
In addition to fertilizing the egg, sperm also ____
a. assist the fertilizing sperm in penetrating the egg b. trigger chemical changes in the egg c. dissolve the outer barriers surrounding the oocyte d. release chemicals to speed cell division in the zygote e. trigger chemical changes in the egg that prevent the entry of more than one sperm
What is the genotype of the wild-type mother of these progeny?
In Drosophila, the autosomal recessive pr and cn mutations cause brown and bright-red eyes, respectively (wild-type flies have brick-red eyes). Flies who are homozygous recessive at both pr and cn have orange eyes. A female who has wild-type eyes is crossed to an orange-eyed male. Their progeny have the following distribution of eye colors:
A) pr cn / pr+cn+
B) pr+cn / pr+cn
C) pr+cn / pr cn+
D) pr cn+ / pr cn+
E) pr cn / pr cn
The tailbone of humans is an example of a(n) ____
a. developing feature b. accidental feature c. vestigial feature d. great chain of being e. fossil structure