The mechanism of phloem translocation in angiosperms is best explained by the pressure-flow model, this model is an example of,

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#Question id: 12855

#General Aptitude

The perimeter of two squares are 40 cm and 24 cm. The perimeter of a third square , whose area is equal to the difference of the area of these squares, is

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#Question id: 12358

#Unit 10. Ecological Principles

Linked subpopulations are referred to as a. 

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#Question id: 10895

#Unit 10. Ecological Principles

Members of a guild

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#Question id: 15637

#Unit 13. Methods in Biology

You have isolated two mutations in the Lac operon that cause constitutive expression of Lac genes. You designate these mutants Lac1– and Lac2–. Making use of an F' that carries the Lac operon with the LacY gene mutated, you construct strains that you test for both ß-galactosidase activity and Lac permease activity with results shown below.

     

Classify each mutation as dominant or recessive and as cis- or trans-acting, giving the experimental result that allows you to arrive at each conclusion. Finally, deduce what type of Lac mutation best fits the properties of Lac 1– and of Lac 2–.

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#Question id: 5415

#General Aptitude

The average marks of three batches of student having 70, 80 and 50 students respectively are 60 ,50 and 46 the average marks of all the 200 students tekan together is