Converting milk to curd improves its nutritional quality by increasing which of the following vitamins in it:

Arrange the following stages of oogenesis in order of their occurrence.
(A) Ovum
(B) Oogonia
(C) Primary oocyte
(D) Secondary oocyte
Choose the correct answer from the options given below :

Match List I with List II

LIST I	LIST II
A. Tubectomy	I. Barrier method
B. Copper ions	II. Surgical method of sterilisation in human male.
C. Cervical Cap	III. Surgical method of sterilisation in human female.
D. Vasectomy	IV. Suppress motility of sperms

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Which of the following is a man-made ecosystem?

Which of the following is a stop codon?

Match List - I with List - II.

List - I	List - II
(A) Cloning vector	(I) Sea weeds
(B) β-galactosidase	(II) Selectable marker
(C) Agarose	(III) Ti-plasmid of Agrobacterium tumifaciens
(D) \(a m p^{ R }\) in pBR322	(IV) Chromogenic screening

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Identify the correct statement with respect to Mycorrhiza.
A. Fungal symbiont absorbs phosphorus from the soil and passes it on to the roots of the plant.
B. Many members of the genus Glomus form mycorrhiza.
C. In paddy fields, mycorrhiza serve as an important biofertilizer.
D. Plants with mycorrhiza show tolerance to salinity and drought.
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Where does the fertilization and development takes place in the life cycle of Plasmodium?

A small telescope has an objective lens of focal length 120 cm and an eyepiece of focal length of 5.0 cm. The magnifying power of telescope for viewing distant objects in normal adjustment is

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.
Conformers are the animals whose body temperature:

Match List I with List - II. -

List – l (Terms)	List – II (Linked to)
(A) Divergent evolution	(l) Branching descent
(B) Convergent evolution	(II) Geographical habitats
(C) Adaptive radiation	(III) Analogous structures
(D) Natural selection	(IV) Homologous structures

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In a Young's double-slit experiment, two slits are 1.5 mm apart while the screen is 1.2 m away. When a light of wavelength 600 nm is incident on slits, the fringe width will be

A battery has an e.m.f 12 V and internal resistance 2 \(\Omega\) This battery is connected to a variable resistor 0 to 5 \(\Omega\). The value of current for which the rate of heat production in the resistor is maximum: