What adaptations should one expect of the seed coats of angiosperm species whose seeds are dispersed by frugivorous (fruit-eating) animals, as opposed to angiosperm species whose seeds are dispersed by other means?
1. The exterior of the seed coat should have barbs or hooks.
2. The seed coat should contain secondary compounds that irritate the lining of the animal's mouth.
3. The seed coat should be able to withstand low pH's.
4. The seed coat, upon its complete digestion, should provide vitamins or nutrients to animals.
5. The seed coat should be resistant to the animals' digestive enzymes.
A) 4 only
B) 1 and 2
C) 2 and 3
D) 3 and 5
E) 3, 4, and 5
Insect species diversity on British host trees supports the area hypothesis.
Species richness increases with island size.
Relationship between body size and seed size in Galapagos finch species
Foliage height diversity and bird species diversity (data from MacArthur and MacArthur 1961).
The Taung Child, the first of the australopithecines to be discovered, is the type specimen for Aust