The Calvin cycle

A. is a cyclic pathway that produces three-carbon carbohydrates from CO2.
B. is a linear pathway that produces three-carbon carbohydrates from CO2.
C. is a cyclic pathway that produces ATP and NADPH.
D. is a linear pathway that produces ATP and NADPH.


A. is a cyclic pathway that produces three-carbon carbohydrates from CO2.

Biology & Microbiology

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Human language differs from language in nonhuman animals in that (select all that apply):

A. humans understand metaphor and nonhuman animals don't. B. human infants strive to learn grammatical language and nonhuman animals don't. C. human language is more complex than is nonhuman language. D. only human language includes distinct wordsspecific sets of sounds that can identify specific objects in the environment. E. None of these accurately describe differences between human and non-human language.

Biology & Microbiology

What is a main function of the structure in the accompanying figure labeled "A"?

a. It controls cell shape. b. It separates DNA during cell division.

c. It helps nerve cells lengthen. d. It is found in hair. e. It helps regulate DNA replication.

Biology & Microbiology

Which of the following is a single-layered, fluidfilled

ball of cells? a. cleavage b. morula c. gastrula d. zygote e. blastula

Biology & Microbiology

When there is a well-established segment of heterochromatin on an interphase chromosome, there is usually a special barrier sequence that prevents the heterochromatin from expanding along the entire chromosome

Gene A, which is normally expressed, has been moved by DNA recombination near an area of heterochromatin. None of the daughter cells produced after this recombination event express gene A, even though its DNA sequence is unchanged. What is the best way to describe what has happened to the function of gene A in these cells? (a) barrier destruction (b) heterochromatization (c) epigenetic inheritance (d) euchromatin depletion

Biology & Microbiology