Match the oxide given in Column-I with its property given in Column-II:

	Column-I		Column-II
(i)	${\mathrm{Na}}_2\mathrm{O}$	(a)	Neutral
(ii)	$\mathrm{A}{\mathrm{l}}_2{\mathrm{O}}_3$	(b)	Basic
(iii)	${\mathrm{N}}_2\mathrm{O}$	(c)	Acidic
(iv)	$\mathrm{C}{\mathrm{l}}_2{\mathrm{O}}_7$	(d)	Amphoteric

 

Which of the following options is correct?

	(i)	(ii)	(iii)	(iv)
1.	(b)	(a)	(d)	(c)
2.	(c)	(b)	(a)	(d)
3.	(a)	(d)	(b)	(c)
4.	(b)	(d)	(a)	(c)

The two antibiotic resistance genes on vector pBR 322 are for:

1. Ampicillin and Tetracycline

2. Ampicillin and Chloramphenicol

3. Chloramphenicol and Tetracycline

4. Tetracycline and Kanamycin

The exploitation of bioresources of a nation by multinational companies without authorization from the concerned country is referred to as:

Carnivorous animals - lions and leopards, occupy the same niche but lions predate mostly larger animals and leopards take smaller ones. This mechanism of competition is referred to as:

The decline in the population of Indian native fishes due to the introduction of Clarias gariepinus in river Yamuna can be categorised as:

1. Co-extinction

2. Habitat fragmentation

3. Over exploitation

4. Alien species invasion

Match the following RNA polymerases with their transcribed products:

Select the correct option from the following:

In a marriage between a male with blood group A and a female with blood group B, the progeny had either blood group AB or B. What could be the possible genotype of the parents?

1. I^A i (Male) ; I^B I^B (Female)

2. I^A I^A (Male) ; I^B I^B (Female)

3. I^A I^A (Male) ; I^B i (Female)

4. I^A i (Male) ; I^B i(Female)

A population of a species invades a new area. Which of the following condition will lead to adaptive radiation?

Identify A, B and C in the diagrammatic representation of the mechanism of hormone action.

Select the correct option from the following:

Humans have acquired an immune system that produces antibodies to neutralize pathogens. Still innate immune system is present at the time of birth because it: