Which of the following statements is true regarding the carbon cycle?
A. It cycles both carbon and H2O.
B. It evolved before plants appeared on
Earth.
C. It was based on microbes during the early
stages of Earth's history.
D. It involves both long- and short-term
processes.
E. All of these statements regarding the
carbon cycle are true.
E
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Which pair of vitamins is produced within the human body?
a. A and C b. A and D c. C and D d. C and K e. D and K
What is the first reactant in the citric acid cycle?
A) pyruvic acid (C3H3O3) B) glucose (C6H12O6) C) carbon dioxide (CO2) D) oxalaoacetate (OAA)
Connective tissue is different from other major tissue types in that it
A) is made of cells. B) has cells that are sparsely scattered through a nonliving matrix. C) covers the surface of the body. D) conducts electrical impulses throughout the body.
Infection with ________ produces symptoms similar to RMSF, except for the rash, making it difficult to diagnose
A) Anaplasma phagocytophilium B) Chlamydophila psittaci C) Chlamydia trachomatis D) Treponema carateum E) Vibrio vulnificus