What is the first reactant in the citric acid cycle?
A) pyruvic acid (C3H3O3)
B) glucose (C6H12O6)
C) carbon dioxide (CO2)
D) oxalaoacetate (OAA)
D
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Common nekton include
a. tuna. b. billfish. c. jelly fish. d. both a and b e. both b and c
Answer the following statements true (T) or false (F)
1.Negative feedback is the most common way that living organisms maintain homeostasis. 2.If body temperature is too high, the hypothalamus stimulates blood vessels in the skin to constrict. 3.The nervous system of a cat is more similar to the nervous system of a human than to the nervous system of a crayfish. 4.Damage to the pons would lead to problems with posture. 5.The autonomic nervous system controls voluntary muscles involved in processes such as moving legs while consciously walking.
DNA barcoding is a method that can be used to identify any organism.
Answer the following statement true (T) or false (F)
Which of the following is a domain of life?
A. Eukaryotes B. Plants C. Animals D. Protists E. Fungi