African wild dogs (Lycaon pictus) are highly social carnivores that live in packs in sub-
Saharan Africa. There is a strong and positive relationship between the wild dog pack
size and its population growth. This is an example of:
A. density dependence.
B. an Allee Effect.
C. lambda > 1.
D. All of the above
E. None of the above
Give this one a try later!
D. All of the above
Operational sex ratios are similar
A. Polygyny
B. Monogamy
C. Promiscuity
, D. Both B & C
E. All of the above
Give this one a try later!
D. Both B & C
Juvenile shore crabs (Carcinus maenas) are capable of color change for camouflage
that helps them hide from predators. See the picture below of their color change
variation.
Researchers experimentally tested this by placing juvenile crabs on different
backgrounds. They found that individual crabs are capable of significant changes in
brightness, becoming lighter on white backgrounds and darker on black
backgrounds. If effective, this camouflage could:
A. reduce prey profitability.
B. increase predator search time.
C. increase predator handling time.
D. A and B
E. A and C
F. All of the above
Give this one a try later!
D. A and B
Which of the following is NOT one of the "Evil quartet" discussed in class?
A. Extinction synergies
B. Overkill
C. Habitat loss
D. Invasive species
E. Secondary extinctions
Saharan Africa. There is a strong and positive relationship between the wild dog pack
size and its population growth. This is an example of:
A. density dependence.
B. an Allee Effect.
C. lambda > 1.
D. All of the above
E. None of the above
Give this one a try later!
D. All of the above
Operational sex ratios are similar
A. Polygyny
B. Monogamy
C. Promiscuity
, D. Both B & C
E. All of the above
Give this one a try later!
D. Both B & C
Juvenile shore crabs (Carcinus maenas) are capable of color change for camouflage
that helps them hide from predators. See the picture below of their color change
variation.
Researchers experimentally tested this by placing juvenile crabs on different
backgrounds. They found that individual crabs are capable of significant changes in
brightness, becoming lighter on white backgrounds and darker on black
backgrounds. If effective, this camouflage could:
A. reduce prey profitability.
B. increase predator search time.
C. increase predator handling time.
D. A and B
E. A and C
F. All of the above
Give this one a try later!
D. A and B
Which of the following is NOT one of the "Evil quartet" discussed in class?
A. Extinction synergies
B. Overkill
C. Habitat loss
D. Invasive species
E. Secondary extinctions
