A good vector must have the following properties.

a) It should be able to replicate autonomously.

b) A vector should be ideally less than 10 kb in size

c) The vector should be easy to isolate and purify.

d)  vector should have suitable marker genes that allow easy detection and/or selection of the transformed host cells.

e) it should a multiple cloning site

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#Question id: 4650

#Zoology

DDT was once considered a ʺsilver bulletʺ that would permanently eradicate insect pests. Today, instead, DDT is largely useless against many insects. Which of these would have been required for this pest eradication effort to be successful in the long run?

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#Question id: 4653

#Zoology

 If two modern organisms are distantly related in an evolutionary sense, then one should expect that

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#Question id: 4654

#Zoology

Structures as different as human arms, bat wings, and dolphin flippers contain many of the same bones, these bones having developed from very similar embryonic tissues. How do biologists interpret these similarities?

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#Question id: 4655

#Zoology

Over evolutionary time, many cave-dwelling organisms have lost their eyes. Tapeworms have lost their digestive systems. Whales have lost their hind limbs. How can natural selection account for these losses?

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#Question id: 4656

#Zoology

Logically, which of these should cast the most doubt on the relationships depicted by an evolutionary tree?

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#Question id: 4657

#Zoology

 Which of the following statements most detracts from the claim that the human appendix is a completely vestigial organ?