What are the two most important organ systems for the maintenance of homeostasis?
a. the lymphatic and circulatory systems
b. the nervous and endocrine systems
c. the endocrine and circulatory systems
d. the lymphatic and circulatory systems
Ans: b. the nervous and endocrine systems
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If 20% of nucleotides in the DNA of a particular organism contain thymine, estimate the percentage of cytosine that is present in the DNA.
A. 40% B. 80% C. 20% D. 15% E. 30%
Which of the following is NOT part of the inflammatory response?
A) Localized tissue swelling B) The release of histamine C) Migration of phagocytes to the site of injury D) The release of antibodies E) Elevated body temperature
A beautiful wood desk you may do your homework on was once a living tree, but after being cut down its tissues died. Now, it only exhibits what property of life?
A. Organization B. Metabolism C. Homeostasis D. Sensitivity
You are given an embryo with eight cells and you carefully separate them and allow them to develop in separate containers. Each of the cells forms a complete embryo that develops normally into an adult animal. How would you categorize your animal?
A. It has indeterminate cleavage. B. It has determinate cleavage. C. It is a protostome. D. It is an annelid, mollusk, or arthropod. E. It has spiral cleavage.