What is contained in vascular bundles in leaves?
a. only xylem
b. only phloem
c. both xylem and phloem
d. either or none may be present
c. both xylem and phloem
Biology & Microbiology
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There are how many different types of amino acids?
a. 5 b. 10 c. 15 d. 20 e. 50
Biology & Microbiology
When a promoter element is bound by a positive regulatory protein, the result is
A) activation of replication. B) activation of transcription. C) activation of translation. D) repression of replication. E) repression of transcription.
Biology & Microbiology
examples of carbohydrates
What will be an ideal response?
Biology & Microbiology
Cancer cells are able to enter blood vessels through what is known as ______.
a. closed junctions b. tight junction c. open junctions d. intermediate junctions
Biology & Microbiology