Following statements are regarding to Kinetochore-microtubule interaction in S. cerevisiae.

A. In the simple kinetochore of S. cerevisiae, a protein complex called CBF3 associates with specialized, centromere-specific form of histone H3, called CENP-A.

B. The Ndc80 complexes initially make lateral interactions with a spindle microtubule and subsequently interact with a Dam1 complex, which forms a ring around the end of the microtubule. This interaction results in an end-on attachment of the centromere to the

spindle microtubule.

C. Microtubules that “capture” kinetochores are selectively stabilized by a reduction in the rate of catastrophes, which increases the chance that the attachment will persist.

D. With the two kinetochores attached to opposite poles, the duplicated chromosome is now under tension, being pulled in both directions by the one sets of kinetochore microtubules.

Which of the following combinations is correct?

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#Question id: 18591

#Unit 11. Evolution and Behavior

First green plants and fungi appeared on the land during which period?

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#Question id: 18590

#Unit 11. Evolution and Behavior

Origin of life starts from which geological time period?

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#Question id: 17265

#Unit 11. Evolution and Behavior

Match the geological time period with the diversification events associated with them:

	COLUMN I		COLUMN II
P.	Cretaceous	i)	First vertebrate appeared, abundant of marine algae
Q.	Devonian	ii)	Seeds ferns disappear, appearance of first dinosaurs
R.	Ordovician	iii)	Rapid development of angiosperms and Extinction of dinosaurs.
S.	Triassic	iv)	First definite evidence of land plant, first wingless insect.
T.	Silurian	v)	First amphibians and first seed plant appear.

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#Question id: 17264

#Unit 11. Evolution and Behavior

The strata of sedimentary rocks in the different regions of the world, have classified geologic history into eras;

Column I	Column II
P. Archeozoic	i) era of medieval life
Q. Proterozoic	ii) era of ancient life
R. Paleozoic	iii) era of primitive life
S. Mesozoic	iv) era of modern life
T. Cenozoic	v) era of early life

Match the following;

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#Question id: 5032

#Unit 11. Evolution and Behavior

There is still some controversy among biologists about whether Neanderthals should be placed within the same species as modern humans, or into a separate species of their own. Most DNA sequence data analyzed so far indicate that there was probably little or no gene flow between Neanderthals and Homo sapiens. Which species concept is most applicable in this example?

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#Question id: 5016

#Unit 11. Evolution and Behavior

Approximately how far back in time does the fossil record extend?