An example of a plesiomorphy in the earliest fossil birds would include ________
A) three clawed fingers on each hand
B) a long, bony tail
C) teeth
D) down-like feathers
E) All of the above.
E
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Phycobilins are
a. photosynthetic pigments. b. found in the red algae. c. blue and red pigments. d. all of the above.
The molecule that an enzyme reacts with is a ________
Fill in the blank(s) with correct word
Biological systems use free energy based on empirical data that all organisms require a constant energy input. The first law of thermodynamics states that energy can be neither created nor destroyed
For living organisms, which of the following statements is an important consequence of this first law? A) The energy content of an organism is constant except for when its cells are dividing. B) The organism must ultimately obtain all the necessary energy for life from its environment. C) The entropy of an organism decreases with time as the organism grows in complexity. D) Organisms are unable to transform energy from the different states in which it can exist.
Which species shows the first solid evidence of bipedalism?
A. Australopithecus afarensis B. Ardipithecus ramidus C. Sahelanthropus tchadensis D. Homo habilis