Evolution by natural selection ________
A) requires that multiple unverified assumptions are made before it can be considered a viable explanation
B) is only a theory and therefore not testable
C) can be tested experimentally
D) can be tested observationally
E) Both C and D.
E
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An animal cell contains ___________ genome(s), while a plant cell contains ___________ genome(s).
A. 1,1 B. 2,2 C. 2,3 D. 3,2 E. 1,2
Variation arises in asexually reproducing populations by ________
a. mutation b. all of the choices c. natural selection d. recombination
What type of respiratory system is found in insects?
1.Countercurrent exchange 2.Internal gills 3.Lungs 4.Trachea
Use the Fitch algorithm to determine the minimum number of evolutionary changes required to explain the character states (red, yellow, or blue) of the seven species depicted on the tree in the figure above
Recall the rules for assigning character states as you work your way down the tree. 1. If each of the two daughters of a node shares one or more possible states for a trait, assign those shared traits to the node in question. 2. If the two daughters share no possible states in common, assign all possible states for both daughters to the node. (Note to instructor: The difficulty of this question can be adjusted by including the two rules above, or not.) What will be an ideal response?