Explore topic-wise InterviewSolutions in .

Why is Government of India imposing a ban on the use of polythene bags? Suggest two alternatives to these bags and explain how this ban is likely to improve the environment.

Once the ovulation is over, the released egg is then picked up by ___ of oviduct funnel.

Why are open drains a matter of concern?

Name any three biofuels that can be used for transportation.

Question 8

Explain the importance of fossils in deciding evolutionary relationships.

Anything that deteriorates the natural quality of the environment is called a ___

Identify the parts in the diagram:

Where do the following functions occur?
i. Production of an egg.
ii. Fertilisation
iii. Implantation of zygote

The female equivalent of a penis is__________

What is ampulla isthmic and why dna copying is essential for reproduction?

What are the factors which reduce the activity of the kidneys?

What is Himalayan yew?

Non-biodegradable waste causes___.

Question 44

Study the following cross and showing self-pollination in F1, fill in the blank and answer the question that follows.

$\begin{array}{cccc}Parents& RRYY& x& rryy\\ & Round,yellow& & wrinkled,green\\ F1-& RrYy& x& ?\\ & Round,yellow& & \end{array}$

Which of the following is not true about extracellular fluids?

A plant cell has 12 chromosomes at the end of mitosis. How many chromosomes would it have in the G2 phase of its next cell cycle?

Name one animal having single circulation of blood and another having double circulation.

The chromatin material is formed of

Based on the location of the dorsal nerve cord, chordates are subdivided into ___________________ & ____________________ .

During photosynthesis, oxygen is produced by_____and carbon dioxide is utilised for ___.

The advantage of separate chambers in heart of mammals and birds is ……...

A skydiver is preparing for the jump. He's experiencing an adrenaline rush. What kind of nervous system will be the one at work here?

Question 5

Accumulation of non-biodegradable pesticides in the food chain in increasing amount at each higher trophic level is known as



(a) eutrophication

(b) pollution

(c) biomagnification

(d) accumulation

In humans, non-motile germ cell is ________ and the motile germ cell is _________.

Which mode of nutrition is found in bacteria and fungi?

What is meant by peptones and peptides

The basic structural and functional unit of the kidney?

The pathway by which food enters the body and solid wastes are expelled:

The cavity in the region of diencephalon in the brain is called the

When cells do not need to divide further, which of the following phases do the cells enter into:

Which one of the following disease is an acute disease?

A red-haired woman marries a brown-haired man , and all the children are brown haired. Explain this genetically.

Which of the following contributes most to transport of water from the ground to the leaves of a tall tree?

Day
by day the nightingale

Grew
more sorrowful and pale.

Night
on night her tired song

Zipped
and trilled and bounced along,

Till
the birds and beasts grew tired

At
a voice so uninspired

And
the ticket office gross

Crashed,
and she grew more morose -

For
her ears were now addicted

To
applause quite unrestricted,

And
to sing into the night

All
alone gave no delight.

She
no longer enjoyed singing alone as

1.
she wanted to sing only for titled crowd

2.
she was now used to the appreciation she got

3.
the frog was no longer with her

4.
she had become proud of herself

The ___ pigment present in the leaves of the plants is known as chlorophyll.

Fill in the correct sequence for generation of Action potential in a neuron

Stimulus ⟶ Inflow of $N{a}^{+}$ ions ⟶ (i) ⟶ Repolarisation ⟶ (ii)

The stem of a fruit tree X fixed in soil is cut in a slanting way. The upper part of the stem of another fruit tree Y of different variety of same species is also cut in a slanting way. The cut stem of tree Y, without roots but having some leaves, is placed over the rooted cut stem of tree X in such a way that their cut surfaces fit together properly. While joining the two cut stems, care is taken to make sure that the layer Z of one cut stem is in contact with layer Z of the other cut stem. The joint of the cut stem is bound tightly with a piece of cloth and covered properly with polythene. Soon the cut heals and the two stems grow together and become one fruit tree producing leaves, flowers and fruits.
(a) What is the name of this method of producing plants or trees?
(b) What name is given to the cut stem of tree X having roots?
(c) What name is given to the cut stem of tree Y which has no roots but has some leaves?
(d) Name the layer Z.
(e) Why should the layer Z of one cut stem be in contact with the layer Z of the other cut stem?
(f) Name any four fruit trees which are usually bred by this technique.
(g) State any one advantage of producing fruit trees by this technique.

Question 33

Does the occurrence of the diversity of animals on earth suggest their diverse ancestry also? Discuss this point in the light of evolution.