What is a growth factor?
A. a small protein that influences cell growth
and division
B. a signaling molecule involved in paracrine
signaling
C. a soluble molecule that can alter gene
expression in a cell
D. All of these answer options are correct.
D
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Which climograph shows the climate for location 5?
A) A B) C C) D D) E E) H
A population that is in genetic equilibrium is said to ____
a. have an equal number of homozygotes as heterozygotes for a given trait b. deviate from the Hardy-Weinberg law c. require genetic testing for estimation of allele frequencies d. lose genetic variation with each generation e. have an allele or alleles that remain constant generation to generation
In order to produce human insulin in bacteria what must be done first?
A. Human insulin protein is purified from the bacteria. B. The human insulin gene must be cloned. C. The human insulin gene must be transformed into bacteria. D. Bacteria containing the human insulin gene are grown. E. The bacterial insulin gene must be cloned.
Clusters of phloem and xylem tissues are called
A. root tissue B. ground tissue C. pith D. vascular bundles