Isolation Mechanism

Topic                               Isolation Mechanism

1.The term of isolating mechanism was introduced by

   1.1939s       2.1932s     3.1918s      4.(1930s)

2.In isolating  mechanism concept of biological sp  are defined through.

1.(reproductive ) 2.   temporal   isolation   3. ecological  isolation 4.behavioral isolation

3.Sperm  transfer takes place but egg  in  not  fertilized.

1.zygotic  mortality 2.hybrid  mortality  3.(gamete incompatibility) 4.hybrid breakdown

4.In how many group isolation can differentiate

1.(Two) 2. three 3.seven 4.  nine

5.The sperm cell cannot fuse with the egg

1.(Pre-zygotic)2.post-zygotic3.pre-mating4.post-mating

6.Factors which causes sp to make with own kind

1.post-mating 2.(pre-mating)3.behavioral isolation4.mechanical isolation

7.The f1 generation can viable but further cannot viable

1.hybrid steriytrt2.(hybrid breakdown)3.temporal isolayion4.zygotic mortality

8.The emphasizing on post-mating mechanism

1.animal2.insect3.human4.(plant)

9.The imbalance of gene complexes contributed by

1.onesp 2.three sp3.group of sp 4.(two sp)

10.The importance of post-mating mechanism

1.(animal )2.insect 3.human. 4.plant

11.If hybrid are formed they partially produced

1.( hybrid sterility) 2.hybrid breakdown 3.hybrid mortality 4.behavioral isolation

12. If fertilization takes place other post –mating will operate hybrid

1.( Zygotic in viability) 2.zygotic mortality 3.hybrid sterility 4.post-mating

13. Premating mechanism fail than which mechanism come into play

 1.( post-mating) 2.pre-zygotc 3.pre-mating 4.hybrid-mortality

14. Ecological isolation is important component of

1. post-mating 2.(pre-mating )3.hybrid sterility 4.hybrid mortality

15. The desert sp in which flower opening morning while other later in after none

1.( Ecological isolation )2.behavioral isolation 3.temporal 4.mechanical

16. Western pine normally sheds its pollen in.

1.( Feb and April )2.june and march 3.july and  April 4.august   and November

17. The plant in which one sp of animal pollinator over other

1.( Orchids )2.pine 3.acaria 4.omega

18. Which isolation play a key role in both animal and plant

1.( ecological )2.temporal 3.behavioral 4.mechanical

19.Floral isolation is a form of.

 1.( morphological) 2.multiple 3.hybrid 4.zygote

20. There are many terms of reproductive isolation

1. 8       2. 5         3.(7)            4. 10

21. Types of pre-zygotic isolation mechanism

1.(  6    ) 2.  8      3.  9     4   .10

22. The 2 sp are found in different  geographical but different habitat

1.( geographical isolation) 2.mechanical 3.physiological 4.temporal

23. The process on which sp exert selective pressure on each  other

1.( Co evolution) 2.adaptive radiation 3.hybridize 4.sympatric evolution

24. The combination of genetic material of 2 distinct sp

1.  gradualism 2.extinction 3. (hybridize) 4.adaptive radiation

25. No longer in extinction

1. (extinction) 2.coevolution 3.sympatric 4.hybridize

                         

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