Four of the five choices listed below are related to

vascular tissue. Select the exception.
a. conduction of water and minerals
b. vascular bundle
c. translocation
d. vein
e. pith


Answer: e

Biology & Microbiology

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In microarrays, the oligonucleotides that are attached have the fluorescent tag, whereas the DNA fragments being tested do not

A. true B. false

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The anterior pituitary secretes more ACTH, leading to more glucocorticoids in plasma, which causes

the anterior pituitary to then secrete less ACTH. This is an example of what type of hormone control?

a. amplification b. positive feedback c. negative feedback d. cascading feedback e. both amplification and positive feedback

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Aseptic packaging (where the packaging itself is rendered sterile) helps to preserve foods through

A) creation of an anaerobic environment in the packaging. B) creation of an anaerobic environment in the packaging and exposure of the packaging to high heat. C) exposure of the packaging to high heat. D) mutation of bacterial DNA by exposure to the packaging material. E) increasing pH in the food contained in the packaging.

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Which of the following statements about pre-transcriptional regulation is false?

A) It allows organisms to rapidly respond to frequent and dramatic changes in the environment. B) It is the one way cells can manage to control protein synthesis. C) It helps cells control when transcription occurs. D) It is managed by transcription factors. E) It helps cells control how often transcription occurs.

Biology & Microbiology