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Mango and coconut are a type of fruit called

Two strings $1$ and $2$ make a junction of partly reflected and partly transmitted waves. The linear mass density of string $2$ is four times that of string $1$, and the boundary between the two strings is at $x=0$. The expression for the incident wave is $y_i=A_i\cos (k_{1}x-{\omega }_{1}t)$. Which of the following relations is correct, if average power carried by the incident wave, transmitted wave and reflected wave are $P_i,P_t\&P_r$ respectively? [Assume tension in string $1$ and $2$ to be the same]

Consider the following statements. Which of them are true?

1. There are three main parts in a neuron - a cell body, an axon and dendrites.

2. The cytoplasm is thick here and contains granular substances called Nissl's bodies.

3. Branched processes termed dendrites arise from the cell body of a neuron.

4. All neurons have only one axon.

Where does the first step in urine formation start?

Ecological efficiency is

Which of the following pairs belong to the category of cold blooded animals?

Carbohydrates with a combination of mucus and related polysaccharides are called _____.

Select the option with the incorrect statement.

I. The building blocks of Lipids are amino acids.

II. Majority of the enzymes contain a non protein part called the prosthetic group.

III. Fructose is the sweetest of all sugars.

IV. Nucleic acids are the hereditary material in living organisms.

Anemophilous flowers do not have:

Which of the following is mainly produced by the activity of anaerobic bacteria on cowdung?

A circular conducting loop is connected with a battery as shown in the figure. The length of $ABC$ and $ADC$ is $l_1$ and $l_2$ respectively, then which one is correct :-

The opening of floral buds into flowers is a type of:

In Griffith’s transformation experiment, the conversion of R strain to S strain was due to:

The correct pathway of movement of gases in the body is

Impulses from photoreceptors are carried to the brain by ________.

Which of the following is not a device used to control particulate matter?

Nobel prize for medicine was given for confirming the role of Helicobacter pylori in causing

Which region of eye consists of dense connective tissue?

Fill in the blanks

1. ___(i) ___ is the rate at which new individuals are added to a population by reproduction.

2. ___ (ii) ___ is the rate at which individuals are lost by death.

3. ___ (iii) ___ refers to individuals moving away from each other.

4. ___ (iv) ___ refers to individuals moving out of a population.

5. ___ (v) ___ refers to individuals moving into a population.

What did Engelmann conclude about the congregation of bacteria in the red and blue areas?

In the core area (or zone) of a National Park/Tiger Reserve

Identify the odd one from the following

Choose the wrong option:

Why is glucose a 'reducing sugar'?

In $C_4$-plants, photosystem II is absent in chloroplasts of

The first undoubted evidence about DNA being the genetic material came from :

Acid rain is due to increase in atmospheric concentration of

The stage at which morphology of chromosomes is easily studied is the stage during which

How many plants in the list given below have marginal placentation?

mustard, gram, tulip, Asparagus, arhar, sunn hemp, chilli, colchicine, onion, moong, pea, tobacco, lupin

A wire carrying current $I$ has the shape as shown in figure. Linear parts of the wire are very long and parallel to $\text{X}$ - axis while the semicircular portion of radius $R$ is lying in $\text{Y - Z}$ plane. Magnetic field at point $\text{O}$ is:

Which of the following statements are true about R strategy?

The intrinsic rate of natural increase is a measure of the:

Amyloplasts stores ______________.

Regarding assertion and reason , choose the correct option.

Assertion [A]: Lichens represent an intimate mutualistic relationship between fungi and photosynthesising algae.

Reason [R]: Mutualistic organisms mostly occupy the same niche and are studied together as they are functionally interlinked.

In which of the following organisms do males develop from unfertilized eggs and females develop from fertilized eggs?

Chlorophyll b differs from chlorophyll a in that it does not

Inferior ovary is found in a/an

The number of nuclei involved in double fertilisation are

Secondary sewage treatment in a sewage treatment plant is mainly a ______________ process.

What is the total volume (approximately) of air that can be forcefully exhaled after a normal inspiration?

Choose the correct statements about Natural Killer cells.

The following figure shows two air-filled bulbs connected by a U-tube partly filled with alcohol. What happens to the levels of alcohol in the limbs X and Y when an electric bulb placed midway between the bulbs is lighted.