Refer to the accompanying figure. The structures labeled as 1 are used for:a

feeding.
b. reproduction


c. attachment.
d. movement.
e. protection.


c

Biology & Microbiology

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The bottom or base of a pyramid of energy consists of:

a. primary producers b. secondary producers c. primary consumers d. secondary consumers e. tertiary consumers

Biology & Microbiology

Once an amino acid has been attached to the appropriate tRNA, the tRNA is called a(n) ________, and the amino acid is said to be ________

Fill in the blank with correct word.

Biology & Microbiology

You briefly expose bacteria undergoing DNA replication to radioactively labeled nucleotides. When you centrifuge the DNA isolated from the bacteria, the DNA separates into two classes

One class of labeled DNA includes very large molecules (thousands or even millions of nucleotides long), and the other includes short stretches of DNA (several hundred to a few thousand nucleotides in length). These two classes of DNA probably represent _____. A) leading strands and Okazaki fragments B) lagging strands and Okazaki fragments C) Okazaki fragments and RNA primers D) leading strands and RNA primers

Biology & Microbiology

At night, when little red light is available to the plants in an area, what occurs?

A) Pfr is converted to Pr. B) Pr and Pfr are both formed from inactive phytochrome. C) Pr and Pfr are both destroyed. D) Pr is converted to Pfr. E) Pr stimulates flowering.

Biology & Microbiology