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
A comparison of alloploidy (seen in species hybrids) and new allopolyploid species.
A pteridophyte stem with tracheophyte adaptations for transporting and conserving water.
Where mangrove diversity is high, mangrove species show clear patterns of vertical zonation relative
These species are all at risk of extinction.
Average Number of Hours Slept per Day by Various Mammalian Species