#Question id: 3506
#Unit 9. Evolution & Diversity of Life Forms
An altruist provides help worth 9 units of fitness to a recipient, at a personal cost of 2 unit of fitness. As per kin-selection theory, the minimum value of genetic relatedness between the actors and the recipients that is necessary to maintain altruism in the population is
#Question id: 3507
#Unit 9. Evolution & Diversity of Life Forms
Rank the following from most general to most specific:
A. gametic isolation
B. reproductive isolating mechanism
C. pollen-stigma incompatibility
D. prezygotic isolating mechanism
#Question id: 3508
#Unit 9. Evolution & Diversity of Life Forms
In these cases, females would indirect benefit by choosing the male that having which of following attribute
a. can provide the best care
b. provide no care, but maintain territories
c. Large males, have probably been successful at living long, acquiring a lot of food and resisting parasites and disease
d. The long tail of the peacock
#Question id: 4562
#Unit 9. Evolution & Diversity of Life Forms
Which stratum should contain the greatest proportion of extinct organisms?
#Question id: 4563
#Unit 9. Evolution & Diversity of Life Forms
If ʺxʺ indicates the location of fossils of two closely related species, then fossils of their most-recent common ancestor are most likely to occur in which stratum?
#Question id: 4564
#Unit 9. Evolution & Diversity of Life Forms
Who would have proposed that the boundaries between each stratum mark the occurrence of different localized floods?