#Question id: 6988
#Unit 5. Developmental Biology
Many cells in the body divide only rarely, if at all; neurons, red blood cells, and keratinocytes are extreme examples. In which portion of the cell cycle would such cells be considered to be?
#Question id: 3496
#Unit 11. Evolution and Behavior
Which of following favor adaptations for polygynous mating in species?
a. Male competition
b. Female competition
c. Male choice
d. Female choice
#Question id: 4987
#Unit 11. Evolution and Behavior
A female fly, full of fertilized eggs, is swept by high winds to an island far out to sea. She is the first fly to arrive on this island, and the only fly to arrive in this way. Thousands of years later, her numerous offspring occupy the island, but none of them resembles her. There are, instead, several species each of which eats only a certain type of food. None of the species can fly, for their flight wings are absent, and their balancing organs (i.e., halteres) are now used in courtship displays. The male members of each species bear modified halteres that are unique in appearance to their species. Females bear vestigial halteres. The ranges of all of the daughter species overlap.In each fly species, the entire body segment that gave rise to the original flight wings is missing. The mutation(s) that led to the flightless condition could have
#Question id: 5090
#Unit 5. Developmental Biology
Which of the following is a correct description of the fate of the germ layers?
#Question id: 20272
#Unit 7. System Physiology – Animal