The Ti plasmid has been genetically engineered to improve its utility as a cloning vector by all of the following EXCEPT
A. nonessential regions, including tumor-inducing genes, have been deleted.
B. elements found in other vectors, such as selectable markers and multicloning sites have been added.
C. genes responsible for resisting infection with B. thuringiensis have been added.
D. genes required for the actual infection of the plant cell by the plasmid are retained.
Answer: C
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A. melting B. mobilization C. separation D. destabilizing
When a cell releases chemicals that act as signals into the extracellular fluid to affect cells, this is an
example of
a. autocrine regulation. b. endocrine regulation. c. paracrine regulation. d. systemic regulation. e. exocrine regulation.
Blood pressure receptors are located in the ____
a. heart b. carotid arteries c. vena cava d. pulmonary arteries e. entire systemic system
If a plant could not get enough phosphorus, then it could not make ________
A) fat B) vitamin A C) ATP D) carbohydrates