Horizontal gene transfer is the transfer of genes between
A. cells within a multicellular organism.
B. two chromosomes in a nucleus.
C. organelles within a cell.
D. different species, either prokaryotic or eukaryotic.
E. one prokaryotic species to a different prokaryotic species.
Answer: D
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Teosinte, a wild relative of corn, was crossed with domestic corn in an attempt to produce a ____ variety
a. herbicide resistant b. pest resistant c. high lysine d. perennial e. higher yielding
The animal in the above diagram has __________
a. an open circulatory system b. no capillaries c. a closed circulatory system d. spaces in the tissues for blood to pool in e. none of these
In a bacterial cross in which the donor (Hfr) is a+b+ and the recipient strain (F-) is a-b-, it is expected that recombinant bacteria will all be a+b+
Indicate whether the statement is true or false
Which of the following statements describes chromatin?
A) Heterochromatin is composed of DNA, whereas euchromatin is made of DNA and RNA. B) Both heterochromatin and euchromatin are found in the cytoplasm. C) Heterochromatin is highly condensed, whereas euchromatin is less compact. D) Euchromatin is not transcribed, whereas heterochromatin is transcribed.