What organism has photoreceptors?
a. Sea anemones
b. Hydroids
c. Corals
d. Jellyfish
d
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The T cell, with its T cell receptor, can recognize antigens only when the antigens are complexed with self proteins known as major histocompatibility complex found on host cell surfaces
Indicate whether the statement is true or false.
The common ancestor shared by mouse and gorilla is at point ______ on the phylogeny shown.
A. A B. B C. C D. D E. E Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about cladistics? Consider Possibilities · Consider the different answer options. Which can you rule out? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Which of the following suggested a method of DNA replication to Watson and Crick?
A. The backbone of the DNA helix is antiparallel. B. Due to complementary basepairing, each strand could act as a template for the other. C. The DNA helix has a major and a minor groove. D. The two strands are held together by strong, covalent bonds. E. The DNA helix is stabilized by hydrophobic stacking.
Hydrochloric acid in the stomach aids in
a. digestion of fats. b. digestion of proteins. c. digestion of carbohydrates. d. production of leptin. e. destruction of microbes in food and digestion of proteins.