45. Cry genes or Bt genes are obtained from a) Cotton pest b) Tobacco plant c) B

Question

45. Cry genes or Bt genes are obtained from a) Cotton pest b) Tobacco plant c) Bacillus thuringiensis d) Coli 46. While genetic engineering has positive benefits, there are also concerns associated with widespread use of genetic engineering in agriculture. If many farmers begin to plant more genetically modified crops that have an increased tolerance to insects, which of the following may result? a) an increase in the contamination of the water supply b) an increase in the use of pesticides c) a decrease in genetic diversity of the crops d) a decrease in crop productivity 47. The way that crimes are solved today was affected by which of the following technologies? a) gene therapy b) genetic testing c) DNA fingerprinting d) Genetic modification

Explanation / Answer

45. ANSWER IS:

c) Bacillus thuringiensis

EXPLANATION :

Cry genes or Bt genes are obtained from Bacillus thuringiensis
Bt genes as the name suggests obtained from Bacillus thuringiensis, a bacteria that produces proteins which are toxic to insects.


46. While genetic engineering has positive benefits, there are also concerns associated with
widespread use of genetic engineering in agriculture. If many farmers begin to plant more
genetically modified crops that have a
increased tolerance to insects, which of the following may result?

ANSWER IS:

c) a decrease in genetic diversity of the crops

EXPLANATION:

Genetic engineering is the direct manipulation of an organism genes using biotechnology techniques. As by genetic modifications gene is maintained in the population, so reduces the genetic diversity.

47. The way that crimes are solved today was affected by which of the following technologies?

ANSWER IS:

c) DNA fingerprinting

EXPLANATION:

DNA fingerprinting, a technique that establish a link between biological evidence and a suspect in crimes. A DNA sample taken from a crime scene then compared with a DNA sample from a suspect. If the two DNA profiles match, then the evidence came from that suspect...

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