Which of the following is the highest (or most complex) level of structure for genetic material?
A. nucleotide.
B. double helix.
C. DNA.
D. gene.
E. chromosome.
E. chromosome.
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According to the biological species concept, members of the same species look alike primarily because they ____
a. live in the same environment b. share the same gene pool c. have a common ancestor d. have stopped evolving e. are adapted to the same life style
Which of the following are inborn errors of metabolism?
a. PKU and alkaptonuria b. sickle cell anemia and hemophilia c. cystic fibrosis and Tay-Sachs disease d. Huntington's disease and fragile X syndrome e. cri-du-chat syndrome and Down syndrome
Answer the following questions with reference to the bones listed below. Answers may be used more than once or not at all.
A. This bone transfers force from the arms to the axial skeleton. B. This bone is not part of the appendicular skeleton. C. A cartilage disk separates units of this bone. D. This bone connects to the femur. E. This is a toe bone. F.
What is the function of a carboxysome?
A) store carbon B) acts as a magnetic compass to guide bacteria C) fix carbon D) protect against oxygen radicals E) store energy