In what types of multicellular organisms do plasmodesmata serve as a mechanism of cell-cell signaling?

A) fungi
B) plants
C) those types of organisms that spend only a portion of their life cycle in a multicellular state
D) animals


Ans: B) plants

Biology & Microbiology

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Identify the correct steps for cloning a gene of interest, then arrange them in the correct order

1. Transform the bacteria. 2. Incubate the DNA fragments and cut cloning vector with DNA ligase. 3. Use restriction enzymes to cut the gene of interest and the cloning vector. 4. Spread bacteria on medium containing lactose and ampicillin. 5. Spread bacteria on medium containing X-gal and ampicillin.

a. 4, 3, 1, 5 b. 3, 2, 5, 1 c. 3, 2, 1, 5 d. 2, 3, 1, 5 e. 3, 2, 1, 4

Biology & Microbiology

Which led to man's ability to make and use tools?

a. the power grip b. the precision grip c. opposable movements d. prehensile movements e. all of these

Biology & Microbiology

The effector molecule that binds to the activator of the lac operon is:

A. lactose. B. glucose. C. cAMP. D. allolactose.

Biology & Microbiology

Explain why the ATP yield from processes such as cellular respiration is generally given as a theoretical number

What will be an ideal response?

Biology & Microbiology