Genetically modified crops have advantages over normal crops as they are:
(A) More tolerant to cold, drought, salt and heat
(B) Less efficient in mineral usage
(C) Less reliant on chemical pesticides
(D) Nutritionally enriched
Choose the correct answer from the options given below :

Aphids and mosquitoes can be controlled by, respectively:

Observe the figure and answer the following questions

Match List I with List II

LIST I (Name of the structure)	LIST II (LABEL)
A. Graafian Follicle	I. B
B. Primary Follicle	II. D
C. Corpus Luteum	III. A
D. Ovum	IV. E

Choose the correct answer from the options given below:

Amniocentesis is legally used to determine---
(A) Sex of the foetus
(B) Presence of genetic disorders
(C) Massive child immunization.
(D) Survivability of the fetus
Choose the correct answer from the options given below:

Read the passage carefully. Attempt the questions.
An overwhelming majority (99 per cent) of animals and nearly all plants cannot maintain a constant internal environment. Their body temperature changes with the ambient temperature. In aquatic animals, the osmotic concentration of the body fluids change with that of the ambient air and water osmotic concentration. These animals and plants are simply conformers. Considering the benefits of a constant internal environment to the organism, we must ask why these conformers had not evolved to become regulators. Recall the human analogy we used above; much as they like, how many people can really afford an air conditioner? Many simply 'sweat it out' and resign themselves to suboptimal performance in hot summer months. Very small animals are rarely found in polar regions. During the course of evolution, the costs and benefits of maintainin a constant internal environment are taken into consideration. Some species have evolved the ability to regulate, but only over a limited range of environmental conditions, beyond which they simply conform.
If the stressful external conditions are localised or remain only for a short duration, the organism has five other alternatives for survival.
Identify the set of aquatic animals whose osmotic concentration is not constant.

The secondary ecological succession begins in an area, where :

Match List I with List II

List - I	List - II
(A) Phenotype reflects the contribution of each allele	(I) Pleiotropy
(B) Multiple phenotypic expressions by a single gene	(II) Linkage
(C) Generation of non-parental gene combinations	(III) Polygenic inheritance
(D) Parental gene combinations higher than non- parental type in \(F_2\) progeny	(IV) Recombination

Choose the correct answer from the options given below:

Primary Alkyl halide \(\text{C}_4\text{H}_9\text{Br}\) (X) reacts with alcoholic \(\text{KOH}\) to give the compound (Y). Compound (Y) is reacted with \(\text{HBr}\)
to give (Z) which is an isomer of (X). When (X) is reacted with \(\text{Na/dry ether}\), it gives a compound (T), \(\text{C}_8\text{H}_{18}\), which is
different from the compound formed when n-butyl bromide is reacted with \(\text{Na/dry ether}\). The correct IUPAC name of (T) is:

Identify the product C in the following sequence of reactions.
\(\text{CH}_3 - \text{CH} = \text{CH} - \text{CH}_3 \xrightarrow{\text{O}_3} \text{A} \xrightarrow{\text{Zn/H}_2\text{O}} \text{B} \xrightarrow{\text{LiAlH}_4} \text{C}\)

A can solve \(90 \%\) problems and B can solve \(70 \%\) problems of the book. A problem is selected at random from the book. The probability that the problem is solved, is equal to

A power transmission line feeds input power at 2400 V to a step-down transformer with its primary windings having 5000 turns. The output power is delivered at 240 V by the transformer. If the current in the primary coil of the transformer is 5 A and its efficiency is 95% then the current in the secondary will be:

The correct expression of the rate of the reaction according to the collision theory is:

The area of region bounded by the curves
\(y=x^2+2, y=-x, x=0\) and \(x=1\) is