The medullary cavity is located in the epiphysis of a bone.
Indicate whether the statement is true or false
Answer: False.
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Which of the following is formed last in the
transfer of solar energy? a. H+ b. excited electrons c. ATP d. O2 e. NADPH
You have been asked to design a synthetic DNA motif, able to bind transcriptional regulatory proteins. The location on this motif that you will design for protein binding is the
A. sugar backbone of the DNA double helix. B. phosphate backbone of the DNA double helix. C. available hydrogen-bonds of bases in single-stranded DNA. D. major groove of the DNA double helix. E. minor groove of the DNA double helix.
You buy a Schlumbergera plant, also known as a Christmas Cactus, to decorate the desk where you study late into the night. It is now December, and there are no signs of flower buds forming. What is the most plausible explanation for the lack of flowers?
A. Cacti are gymnosperms, not angiosperms, and thus do not form flowers. B. As a long-day plant, the cactus requires a high light to dark ratio to flower, so it must be exposed to more sunlight. C. Flowering in this plant is controlled by both day length and temperature. The warm room and extended exposure to light are preventing flower formation. D. The room is too cold for a cactus plant, which requires hot, desert conditions to flower.
Which of the following best describes a theory?
A. an experiment that is repeated over and over again B. a tentative explanation of natural phenomena C. a comprehensive explanation of natural phenomena supported by abundant evidence D. a well-known fact