Accommodation involves the ability to
a. change the sensitivity of the rods and cones by means of neurotransmitters.
b. change the curvature of the cornea.
c. change the width of the lens by contracting or relaxing certain muscles.
d. adapt to large changes in light intensity.
e. see variations in color.
C
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Answer the following statements true (T) or false (F)
1. A modern goal of systematics is to create taxa based on similarity of form and function, regardless of evolutionary relationships. 2. An assumption used for molecular clocks is that neutral mutations accumulate at a rapidly increasing rate over time between two species. 3. Alan Cooper, Cécile Mourer Chauviré, Geoffrey Chambers, Arndt von Haeseler, Allan Wilson and Svante Pääbo investigated the evolutionary relationship among some extinct and living species of flightless birds. They used tissue samples from museums and from living birds. This is an example of discovery-based science. 4. Horizontal gene transfer is thought to have been an important factor in the early evolution of the three domains.
The fly agaric, a giant toadstool, consumes dead organic material, so it is said to be a(n) ________
Fill in the blank(s) with correct word
In addition to autosomes, what is contained in a human sperm cell?
A) an X chromosome always B) either an X or a Y chromosome C) a Y chromosome always D) both an X and a Y chromosome
These enzymes have the ability to cut DNA at places where specific sequences of nucleotides occur.
A. restriction B. ligases C. helicases D. polymerases