High-efficiency natural transformation
A) is common in Bacteria and Archaea.
B) requires specialized DNA uptake, DNA binding, and integration proteins.
C) is only common in Archaea.
D) usually involves plasmids.
Answer: B
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Answer the question using the accompanying figure. In the internal leaf structure, the structure labeled "4" is ____
a. a vascular bundle b. spongy mesophyll c. epidermis d. a stoma e. palisade mesophyll
Compare mitosis and meiosis. Which statement is accurate?
a. Meiosis I is more like mitosis than is meiosis II. b. Both processes result in four cells. c. Synapsis (pairing of chromosomes) occurs in both. d. Chromatids are present only in mitosis. e. Meiosis II resembles mitosis.
Impulses conducted along the transverse tubules of the muscle fiber stimulate
A. the release of ATP. B. the binding of actin to the Z lines. C. tropomyosin and troponin binding. D. the release of calcium ions. E. the release of acetylcholine.
Jaws and paired fins evolved in early __________. Fill in the blank(s) with the appropriate word(s)