Which one of the following shows isogamy with non flagellated gametes?

Which one of the following fungi contains hallucinogens?

Five kingdom system of classification suggested by R.H. Whittaker is not based on:

Archaebacteria differ from eubacteria in :

Which one of the following is wrong about Chara?

Which of the following is responsible for peat formation?

When the margins of sepals or petals overlap one another without any particular direction, the condition is termed as:

You are given a fairly old piece of dicot stem and a dicot root. Which of the following anatomical structures will you use to distinguish between the two?

The osmotic expansion of a cell kept in water is chiefly regulated by :

Placenta and pericarp are both edible portions in:

Which one of the following statements is correct?

Tracheids differ from other tracheary elements in:

An example of edible underground stems is:

Which structures perform the function of mitochondria in bacteria?

The solid linear cytoskeletal elements has diameter of 6 nm and made up of a single type of monomer are known as:

During which phase(s) of cell cycle, amount of DNA in a cell remains at 4C level if the initial amount is denoted as 2C?

Anoxygenic photosynthesis is characteristic of:

Dr. F. Went noted that if coleoptile tips were moved and placed on agar for one hour, the agar would produce a bending when placed on one side of freshly-cut coleoptile stumps. Of what significance is this experiment?

In which one of the following processes CO₂ is not released?

Deficiency symptoms of nitrogen and potassium are visible first in :

A few normal seedlings of tomato were kept in a dark room. After a few days they were found to have become white-coloured like albinos. Which of the following terms will you use to describe them?

Geitonogamy involves:

Male gametophyte with least number of cell is present in :

An aggregate fruit is one which develops from:

Which one of the following growth regulators is known as stress hormone?

From a disc of radius R and mass M, a circular hole of diameter R, whose rim passes through the centre is cut. What is the moment of inertia of the remaining part of the disc about a perpendicular axis, passing through the centre?

A siren emitting a sound of frequency 800 Hz moves away from an observer towards a cliff at a speed of 15m/s. Then, the frequency of sound that the observer hears in the echo reflected from the cliff is:
(Take velocity of sound in air=330m/s)

The magnetic susceptibility is negative for :

In a diffraction pattern due to a single slit of width 'a', the first minimum is observed at an angle 30° when light of wavelength 5000Å is incident on the slit. The first secondary maximum is observed at an angle of-

At what height from the surface of earth the gravitation potential and the value of g are (-5.4 x 10) J kg-² and 6.0 ms-² respectively?
(Take the radius of earth as 6400km)

Out of the following options which one can be used to produce a propagating electromagnetic wave?

A refrigerator works between 4°C and 30°C. It is required to remove 600 calories of heat every second in order to keep the temperature of the refrigerated space constant. The power required is:
(Take 1 cal=4.2 Joules)

An air column, closed at one end and open at the other, resonates with a tuning fork when the smallest length of the column is 50 cm. The next larger length of the column resonating with the same tuning fork is:

A black body is at a temperature of 5760 K. The energy of radiation emitted by the body at wavelength 250 nm is U1, at wavelength 500 nm is U2 and that at 1000 nm is U3. Wien's constant, b=2.88 x 10⁶ nmK. Which of the following is correct?

Coefficient of linear expansion of brass and steel rods are a1 and a2. Lengths of brass and steel rods are l1 and l2 respectively. If (l2-l1) is maintained same at all temperatures, which one of the following relations holds good?

A disk and a sphere of same radius but different masses roll off on two inclined planes of the same altitude and length. Which one of the two objects gets to the bottom of the plane first?

The molecules of a given mass of a gas have r.m.s. velocity of 200 ms-¹ at 27°C and (1.0x105)Nm-² pressure. When the temperature and pressure of the gas are respectively, 127°C and (0.05x10⁵) Nm-², the r.m.s. velocity of its molecules in ms-¹ is:

Which structure(s) of proteins remains(s) intact during denaturation process?

The polymer that is used as a substitute for wool in making commercial fibres is

The artificial sweetner stable at cooking temperature and does not provide calories is

The amine that reacts will Hinsberg's reagent to give an alkali insoluble product is :