MCQ
Select the incorrect pair
- AHenking - $X$ body
- BMorgan - Linkage and recombination
- CSutton - Chromosomal theory of Inheritance
- ✓Alferd sturtevant - Law of segregation
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| List $- I$ | List $- II$ |
| $(a)$ Adaptive radiation | $(i)$ Selection of resistant varieties due to excessive use of herbicides and pesticides |
| $(b)$ Convergent evolution | $(ii)$ Bones of forelimbs in Man and Whale |
| $(c)$ Divergent evolution | $(iii)$ Wings of Butterfly and Bird |
| $(d)$ Evolution by anthropogenic action | $(iv)$ Darwin Finches |
Choose the correct answer from the options given below.
$(a)- (b)- (c)- (d)$
$(i)$ All the cells of the epithelium are held together with little intercellular materials.
$(ii)$ In almost all animal tissues specialized junction provide both structural and functional link between its individual cells.
$(iii)$ Tight junctions help to stop substances from leaking across a tissue.
$(iv)$ Adhering junctions provide cementing to keep neighbouring cells together.
$(v)$ Gap junctions provide cytoplasmic channels between cells for passage of ions, small molecules and sometimes big molecules.