Which two species might be expected to cooperate metabolically, perhaps forming a biofilm wherein one species surrounds cells of the other species?
A) species A and B
B) species A and C
C) species B and E
D) species C and D
A
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A group of cells having similar structure and function is called a(n)
A. tissue. B. organ. C. organ system. D. organism. E. population.
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
Which of the following best describes the number of distinct evolutionary branches in the domain
Bacteria, as revealed by genome sequencing studies?
a. 3?4 b. 6?7 c. 9?10 d. at least 12 e. at least 20
The foraging gene of fruit flies encodes an enzyme involved in:
a. the digestion of yeast b. the ability to smell food c. producing saliva d. learning about olfactory cues e. digesting fruit