#Question id: 4574
#Section 2: Evolution
Ichthyosaurs were aquatic dinosaurs. Fossils show us that they had dorsal fins and tails, as do fish, even though their closest relatives were terrestrial reptiles that had neither dorsal fins nor aquatic tails. The dorsal fins and tails of ichthyosaurs and fish are
#Question id: 3484
#Section 2: Evolution
Modern behavioral concepts relate the cost of a behavior to its benefit. Under which relationship might a behavior be performed?
A) cost is greater than the benefit
B) cost is less than the benefit
C) cost is equal to the benefit
#Question id: 8687
#Section 2: Evolution
Your professor wants you to construct a phylogenetic tree of orchids. She gives you tissue from seven orchid species and one lily. What is the most likely reason she gave you the lily?
#Question id: 10817
#Section 1: Ecology
Removal of a __________________ from a community affects community structure significantly.
#Question id: 10591
#Section 1: Ecology
The following figure shows distribution pattern of species.
Based on the above, which of the following distribution correct?