Alien

Of the four major causes for the loss of biodiversity (Alien species invasion habitat loss and fragmentation, over-exploitation and co-extinctions ) Which according to you is the major cause for the loss of biodiversity ? Give reasons in suppport.

In each of the following questions, the first word have a definite relationship. Choose one word of the given four alternatives which will fill in the blank space and show the same relationship with the third word as between the first two. Alienation is to Enstrangement as Paranoia is to .......?

Assertion: Introduction of alien species is responsible for extinction of indigenous species. Reason: Alien species have no natural predator. So they causes uncontrolled predation and donot show prudent nature.

Assertion : If any piece of DNA is somehow transferred into an alien organism,, most likely, this piece of DNA would not be able to multiple itself in the progeny cells of the organism Reason :For the multiplication of any alien piece of DNA in an organism it needs to be a part of a chromosome (s) which has a specific sequence known as origin of replication.

Assertion : A piece of DNA inserted into an alien organism generally does not replicate if not inserted into a chromosome. Reason : Chromosomes have specific sequences called ori region where DNA replication is initiated.

In the cinema set of a movie, 125 mechanical aliens were created. Some of these aliens had peculiar features. 40 had two noses, 30 had three legs, 20 had four ears, 10 had two noses and three legs, 12 had three legs and four ears, 5 had two noses and four ears and 3 had all the three unusual features. How many were there without any of these unusual features? (a) 5 (b) 35 (c) 80 (d) None of these

(a) Indiscriminate human activities such as alien species invasion, fragmentation and habits loss have accelerated the loss of biodiversity. Justify by taking one example of each. (b) State the importance of (i) IUCN Red data list and (ii) Hot spots in conservation of biodiversity.