Predators can switch to alternative prey when a
prey species is low in abundance as is shown
in
a. type I response.
b. type II response.
c. type III response.
d. types I and II.
e. none of these.
C
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Examine the pedigree in the figure above. Individuals affected by the genetic condition in question are indicated by
filled squares or circles. Which inheritance pattern is most likely correct for this condition in this family?
a. autosomal dominant b. X-linked recessive c. X-linked dominant d. cytoplasmic inheritance
e. autosomal recessiveWhy can plastids, like mitochondria, not live outside of the host cell?
a. They are anaerobic and cannot exist in the oxygen-rich environment outside the cell. b. Outside of the cell, they cannot defend themselves and are quickly destroyed by predators. c. Both of these organelles have given up many of their necessary genes to the nucleus of the host cell and cannot function without them. d. They cannot harvest energy or store energy and need the cell for these functions.
One goal of pedigree analysis is to discover whether the gene in question is located on an X or a Y chromosome or on
a(n) ____________________. Fill in the blank(s) with the appropriate word(s).
What does a completely columnar population pyramid represent?
A) proportionally more young than middle-aged or elderly people B) equal proportions of young, middle-aged, and elderly people C) proportionally more middle-aged and elderly than young people D) proportionally more middle-aged than elderly and/or young people