Protein bands that connect sarcomeres are called
A) myofibrils. B) troponins. C) T tubules. D) Z discs.
D
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Research does not indicate a link between the numbers and types of bacteria causing periodontitis and thicker carotid arteries in an individual.
Answer the following statement true (T) or false (F)
The first cloned cat, called Carbon Copy, was a calico, but she looked significantly different from her female parent because _____
A) the cloning was done poorly and it was likely that some contaminating cat DNA became part of Carbon Copy's genome B) fur color genes in cats is determined by differential acetylation patterns C) cloned animals have been found to have a higher frequency of transposon activation D) X inactivation in the embryo is random and produces different patterns
Which of the following are sex hormones?
A) androgens, only B) estrogens, only C) progestins, only D) All of these are sex hormones.
What is the appropriate order of the stages of investigating whether maple trees drop their leaves in the autumn because of colder days?(1) Maple trees are grown in two greenhouses where the only variable is temperature (15°C vs. 10°C).(2) The hypothesis is rejected.(3) There is no statistical difference in the number of leaves dropped at 10°C as compared to 15°C.(4) The observation is that maple trees drop their leaves in autumn.(5) The hypothesis is that maple trees drop their leaves because of colder temperatures.
A. 3, 4, 5, 1, 2. B. 3, 4, 2, 1, 5. C. 1, 2, 3, 4, 5. D. 5, 4, 3, 1, 2. E. 4, 5, 1, 3, 2.