Which of the following statements are correct about energy flow?
(A) Net primary productivity is available to consumers.
(B) Secondary productivity increases with each trophic level.
(C) The growth of the food chain is limited by the inefficiency of energy transfer.
(D) About 90% energy at one trophic level does not appear at the next level.
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The correct sequence of steps to obtain gene of interest from pool of DNA is:
(A) Cutting of DNA using restriction endonuclease.
(B) Viewing the ethidium bromide stained gel under UV light.
(C) Loading of DNA in wells.
(D) Cutting and extraction of DNA piece from gel.
(E) Separation of DNA fragments according to their molecular size.
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Identify the statements which are not correct with respect to embryonic development:
(A) By the end of 12 weeks the body of foetus is covered with fine hair
(B) The first sign of growing foetus is the appearance of heart beat
(C) Foetus develop limbs and digits by the end of second month of pregnancy
(D) The ectoderm, mesoderm and endoderm are formed after first trimester of pregnancy
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Read the following passage carefully and answer the given questions.
Productivity in the Ecosystem
The flow of energy through a terrestrial ecosystem starts with the harnessing of sunlight by autotrophs. The radiant energy is converted by photosynthesis to organic compounds is known as productivity. The productivity is expressed in units of energy per unit of area per unit time. The amount of organic matter present at any given time is biomass. The productivity of any ecosystem is affected by many parameters like weather conditions, nutrient availability etc. The productivity of any ecosystem does vary seasonally and yearly.
The amount of organic matter accumulated in an ecosystem at a given time is known as-

Match List I with List II

List - I	List - II
(A) Prokaryotic DNA	(I) Nucleosome core
(B) Histones	(II) Higher level chromatin packaging
(C) Octamer	(III) Lysine, Arginine
(D) Non-histone chromosomal proteins	(IV) No charge
	(V) Nucleoid

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Select the brain capacity of Homo erectus from the following:

GM plant/crop are:
(A) Rich in vitamins
(B) Pest resistant
(C) Prone to post harvest loss
(D) More tolerant to drought
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The maximum value of \((\sin x)(\cos x)\) is :

Identify the correct statement for the species diversity.

The degree of the differential equation \(\left(2+\left(\frac{d y}{d x}\right)^2\right)^{\frac{3}{2}}=a^2 \frac{d^2 y}{d x^2}\) is :

Which of the following statement(s) is (are) not associated with \(\text{S}_\text{N}1\) reaction:
(A) Rearrangement is possible.
(B) The rate is affected by solvent polarity.
(C) The strength of nucleophile is involved in rate determining step.
(D) The reaction order of alkyl halides is tertiary > secondary > primary.
(E) Proceeds with complete inversion of configuration.
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Arrange the following events in correct sequence :
(A) Virus infects macrophages
(B) Viral DNA is produced by reverse transcriptase
(C) Viral DNA incorporates into host genome
(D) Viral RNA is introduced into macrophages
(E) New viruses are produced
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Which hormone is responsible for ovulation in human females?