Give some examples showing how cells respond to signals. How are signals terminated? What will be an ideal response?
Concepts to Consider: Regulation of ion channels in neurons; assembly of microtubules and
microfilaments in neutrophils; alteration of gene activity in Arabidopsis; termination via
GTPase, phosphodiesterase, and phosphatase.
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To discover a catabolic gene cluster, cloning large sequences of approximately 40 kbp requires the utility of
A) bacterial artificial chromosomes (BACs). B) cosmids or fosmids. C) a eukaryotic host to house the large foreign DNA. D) multiple gene fusions.
If you were to penetrate through the epidermal
layer of a root, you would next encounter the
a. xylem. b. endodermis. c. cortex. d. phloem. e. pith.
________ tissue coordinates body activities that result from initiation and transmission of nerve impulses from one part of the body to another
Fill in the blank(s) with correct word
Arrange the following structures, which can be found on male pine trees, from the largest structure to the smallest structure (or from most inclusive to least inclusive)
1. sporophyte 2. microspores 3. microsporangia 4. pollen cone 5. pollen nuclei A) 1, 4, 3, 2, 5 B) 1, 2, 3, 5, 4 C) 4, 1, 2, 3, 5 D) 4, 3, 2, 5, 1