A typical leaf contains __________ chloroplasts
a. 1–5
b. 20–100
c. 100,000–300,000
d. millions of
B
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List three contributions of Ferdinand Cohn to the development of microbiology
What will be an ideal response?
During translation, the rRNA in the large ribosomal subunit acts as an enzyme, linking amino acids together to form a polypeptide
a. True b. False Indicate whether the statement is true or false
All of the following are true of every cell of the early
human embryo EXCEPT that a. each has the same genes as all the others. b. each can give rise to an entire human. c. they are undifferentiated. d. all will differentiate alike. e. all have maternal messages.
The site of communication between a neuron and a muscle fiber is called a
A) Z disc. B) myofibril. C) sarcomere. D) neuromuscular junction.