These creatures are nonmotile, spore-forming, unicellular parasites of animals.
A. ciliates
B. amoeba
C. water molds
D. apicomplexans
Answer: D
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The main regulator of calcium blood levels is the ____
a. parathyroid glands b. thyroid glands c. hypothalamus d. anterior pituitary gland e. posterior pituitary gland
In an experiment, Stephanie placed a potted plant under a bell jar, completely sealing the jar to the table top. After placing a box over the bell jar for 24 hours, she measured the concentrations of oxygen and carbon dioxide in the gas in the jar. Which statement best describes the measurements she would find in the jar, compared with the concentrations of oxygen and carbon dioxide in the classroom air?
A) Concentrations of both carbon dioxide and oxygen decreased. B) Concentrations of both carbon dioxide and oxygen increased. C) Carbon dioxide concentration increased; oxygen concentration decreased. D) Oxygen concentration increased; carbon dioxide concentration decreased.
There are three alleles controlling the ABO blood types. IA and IB are codominant genes so that the combination IAIB produces the AB blood type. The third allele, i, is recessive to the other two alleles. Which of the following combinations of parents (with blood types on the left) and child (with blood type listed on the right) is NOT possible?
A. A ´ AB = B B. A ´ O = A C. A ´ B = O D. A ´ AB = O E. A ´ AB = B
A DNA fragment with a sticky end that reads -ATTCG will bind with another DNA fragment with a sticky end that reads ________
A) TAAGC- B) CGGAT- C) GCCTA- D) ATTGC-