The ploidy of adult human cells is __________, but eggs and sperm are ____________
Fill in the blank(s) with the appropriate word(s)
Answer: diploid, haploid
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HeLa cells allowed a formal identification of
the causative agent of
a. cholera. b. polio. c. chickenpox. d. Lassa fever. e. smallpox
Peahens prefer to mate with peacocks that have
the brightest and largest tail displays. The peacock’s tail is, in and of itself, a disadvantage to the males. It is large and cumbersome and the males are more easily caught by predators because of it. Given these facts, why isn’t the peacock’s tail selected against by natural selection?
a. peacocks lack the mutations to allow selection to work b. it is working- peacocks are slowly going extinct c. in spite of the disadvantage, peacocks with larger tails leave more offspring d. it is selected against but because a peahen gives birth to so many males, the population is not greatly affected e. this is one of those mysteries of biology
Which of the following structural components
is NOT a part of a bacteriophage?
a. protein coat b. DNA c. viral envelope d. all of these ARE parts of a bacteriophage e. more than one of these is NOT a part of a bacteriophage
The endosperm of an angiosperm seed is typically:a
haploid (1n). b. diploid (2n). c. triploid (3n). d. quadraploid (4n). e. pentaploid (5n