How many chromatids are present in prophase I of meiosis I in a diploid cell, 2n = 12?
A) 6
B) 12
C) 24
D) 48
C) 24
You might also like to view...
The member of the domain Bacteria whose genome shows it to be most closely related to the Archaea is ________.
A. Synechococcus B. Thermotoga C. Aquifex D. Deinococcus
Answer the following statements true (T) or false (F)
1. Because they differ from other living organisms by lacking a discrete nucleus and many other cell inclusions, bacteria and archaea are more closely related to one another than they are to eukaryotes. 2. Archaea that tolerate and/or require high salinities are called halophiles. 3. Various anaerobic archaea that convert carbon dioxide and other carbon-bearing compounds into methane are called methanotrophs. 4. Type IV secretion systems are potentially applicable to treatment of human disease by using them to deliver DNA to target cells in human gene therapy.
In human gene therapy, genes are transferred by
a. viral vectors or lipid clusters b. bacterial cells. c. bacterial plasmids. d. hypodermic injection. e. tissue transplantation.
In an estuary, the zone of maximum vertical difference in density of water layers is called the
A) thermocline. B) pycnocline. C) mixing zone. D) hypolimnion.