Free nerve endings detect all of the following EXCEPT
a. touch.
b. pressure.
c. heat.
d. pain.
e. light.
E
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In the internal leaf structure shown above, the item labeled "4" is
a. a vascular bundle. b. spongy mesophyll. c. epidermis. d. a stoma. e. palisade mesophyll.
Important molecular discoveries in the 1980s have led researchers to hypothesize that the original, vital organic molecule shaping living things was not what was first thought
What molecule is currently supported as the candidate for the vital molecule for early life?
What roles do plasmids play in biotechnology?
A) Plasmids are used to break open the cell wall of bacterial cells. B) Plasmids are used to provide nutrients to bacterial cells. C) Plasmids are used to infect and destroy bacterial cells. D) Plasmids are used as a vector to transfer genes between organisms.
Archaeal and bacterial pili are identical in structure and function.
Answer the following statement true (T) or false (F)