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11351.

If blood flows through the heart twice for completing one circulation, it is called

Answer»

If blood flows through the heart twice for completing one circulation, it is called

11352.

Please send a video or easy explanation about the process of hemodialysis

Answer»

Please send a video or easy explanation about the process of hemodialysis

11353.

What are the differences between sympathetic and parasympathetic system?

Answer»

What are the differences between sympathetic and parasympathetic system?

11354.

Name the relay station of impulses to and from the cerebrum.

Answer»

Name the relay station of impulses to and from the cerebrum.


11355.

Explain if there can be more than two alleles.

Answer» Explain if there can be more than two alleles.
11356.

Which compounds are responsible for the depletion of ozone layer?

Answer»

Which compounds are responsible for the depletion of ozone layer?

11357.

Which of the following are often called glands of emergency ? (a) thyroid (b) pituitary (c) adrenal (d) pancreas

Answer»

Which of the following are often called glands of emergency ?

(a) thyroid

(b) pituitary

(c) adrenal

(d) pancreas

11358.

Why is a small number of surviving tigers a cause of worry from the point of view of genetics?

Answer» Why is a small number of surviving tigers a cause of worry from the point of view of genetics?
11359.

Which one of the following pairs of brain part and its function is not correctly matched ? (a) cerebrum - memory (b) cerebellum -balance of body (c) Medulla oblongata - controls activities of internal organs (d) Pons - consciousness

Answer»

Which one of the following pairs of brain part and its function is not correctly matched ?

(a) cerebrum - memory

(b) cerebellum -balance of body

(c) Medulla oblongata - controls activities of internal organs

(d) Pons - consciousness

11360.

What happens during fertilisation in humans after many sperms reach close to the ovum?

Answer»

What happens during fertilisation in humans after many sperms reach close to the ovum?


11361.

The theory of Natural Selection was proposed by (a) Mendel (b) Lamarck (c) Wallace (d) Darwin

Answer»

The theory of Natural Selection was proposed by

(a) Mendel

(b) Lamarck

(c) Wallace

(d) Darwin

11362.

What does the poet mean by the phrase "little room” in the last verse of the poem?

Answer»

What does the poet mean by the phrase "little room” in the last verse of the poem?

11363.

In the figure given alongside, the parts marked A, B and C are sequentially : (a) cotyledon, plumule and radicle (b) plumule, radicle and cotyledon (c) plumule, cotyledon and radicle (d) radicle, cotyledon and plumule

Answer»

In the figure given alongside, the parts marked A, B and C are sequentially :
(a) cotyledon, plumule and radicle
(b) plumule, radicle and cotyledon
(c) plumule, cotyledon and radicle
(d) radicle, cotyledon and plumule

11364.

Fermentation carried out by yeast is called as _________ .

Answer»

Fermentation carried out by yeast is called as _________ .


11365.

Label the parts of the male reproductive system.

Answer»

Label the parts of the male reproductive system.


11366.

Photosynthesis is a chemical process that converts ____ energy to _____ energy.

Answer»

Photosynthesis is a chemical process that converts ____ energy to _____ energy.


11367.

"The electric impulses generated by stimuli reach the synaptic knob where certain chemical substances are secreted." Name the chemical substances referred here.

Answer»

"The electric impulses generated by stimuli reach the synaptic knob where certain chemical substances are secreted."

Name the chemical substances referred here.


11368.

Contraction of the ciliary muscles ____ the focal length of the eye lens.

Answer»

Contraction of the ciliary muscles ____ the focal length of the eye lens.


11369.

Ureotelism is found in

Answer»

Ureotelism is found in


11370.

What Is Trisomy of 21st Chromosome? Explain.

Answer» What Is Trisomy of 21st Chromosome? Explain.
11371.

Which of the following are not tropisms? (i) growing of pollen tube in response to a sugary substance (ii) folding up of leaves of the sensitive plant in response to touch (iii) the winding of tendril around a support in response to touch (iv) opening up of the leaves of a daisy flower in response to light (a) (i) and (ii) (b) (ii) and (iii) (c) (i) and (iv) (d) (ii) and (iv)

Answer»

Which of the following are not tropisms?

(i) growing of pollen tube in response to a sugary substance

(ii) folding up of leaves of the sensitive plant in response to touch

(iii) the winding of tendril around a support in response to touch

(iv) opening up of the leaves of a daisy flower in response to light

(a) (i) and (ii)

(b) (ii) and (iii)

(c) (i) and (iv)

(d) (ii) and (iv)

11372.

The advantages of coitus interruptus are: (i) Does not effect a woman's fertility (ii) Ease of use (iii) No side effects (iv) Free of cost

Answer»

The advantages of coitus interruptus are:

(i) Does not effect a woman's fertility
(ii) Ease of use
(iii) No side effects
(iv) Free of cost


11373.

Why are bacteria and fungus termed as microorganisms? [1 MARK]

Answer»

Why are bacteria and fungus termed as microorganisms? [1 MARK]

11374.

Difference between trypsin and pepsin.

Answer» Difference between trypsin and pepsin.
11375.

What are the maternal and paternal chromosomes?

Answer»

What are the maternal and paternal chromosomes?

11376.

Why do we sweat more in summer?

Answer»

Why do we sweat more in summer?

11377.

What is the main aim of forest conservation? [2 MARKS]

Answer»

What is the main aim of forest conservation? [2 MARKS]

11378.

Which one, of the following blood vessels, has no muscles?

Answer»

Which one, of the following blood vessels, has no muscles?


11379.

The germ cell A produced by a person X is round in shape and it fuses with another germ cell B having a long tail and produced by a person Y. The fusion of A and B produces a new cell C. The cell C divides repeatedly and grows inside the organ D of person X to form E in which the body features of the unborn baby are not much developed. E grows further to form F in which the various body features of the unborn baby (like hands, legs, head, eyes, and ears, etc.) can be identified. F grows further and ultimately forms a baby. What are A, B, C, E and F ? Out of the two persons X and Y, which one is male and which one female?

Answer»

The germ cell A produced by a person X is round in shape and it fuses with another germ cell B having a long tail and produced by a person Y. The fusion of A and B produces a new cell C. The cell C divides repeatedly and grows inside the organ D of person X to form E in which the body features of the unborn baby are not much developed. E grows further to form F in which the various body features of the unborn baby (like hands, legs, head, eyes, and ears, etc.) can be identified. F grows further and ultimately forms a baby. What are A, B, C, E and F ? Out of the two persons X and Y, which one is male and which one female?

11380.

The alkaloids found in the plant Madagascar Periwinkle is useful for curing which type of cancer?

Answer»

The alkaloids found in the plant Madagascar Periwinkle is useful for curing which type of cancer?


11381.

Even when we are not doing any apparent activity we need energy. Justify giving reason.

Answer»

Even when we are not doing any apparent activity we need energy. Justify giving reason.

11382.

What is the molecular phylogeny and ontogeny ?

Answer» What is the molecular phylogeny and ontogeny ?
11383.

What are molecular movement and why are the molecular movement is important for life? Give examples also

Answer» What are molecular movement and why are the molecular movement is important for life? Give examples also
11384.

Watson and Crick are known for their discovery that DNA is

Answer»

Watson and Crick are known for their discovery that DNA is


11385.

Transpiration has great significance for the plant like_______.

Answer»

Transpiration has great significance for the plant like_______.


11386.

(a) Are xylem vessels living or dead? (b) Suggest why removing the bark and the layers down to the xylem can kill the tree. [3 MARKS]

Answer» (a) Are xylem vessels living or dead?
(b) Suggest why removing the bark and the layers down to the xylem can kill the tree. [3 MARKS]
11387.

How are new individuals formed in spirogyra?

Answer»

How are new individuals formed in spirogyra?

11388.

Which of type of cells does not divide in adult humans?

Answer»

Which of type of cells does not divide in adult humans?


11389.

Cochlea contains______.

Answer»

Cochlea contains______.


11390.

Describe the layering method for the artificial propagation of plants. Illustrate your answer with the help of a labelled diagram. Name any five plants which are propagated by the layering method.

Answer» Describe the layering method for the artificial propagation of plants. Illustrate your answer with the help of a labelled diagram. Name any five plants which are propagated by the layering method.
11391.

In an experiment, four freshly plucked leaves (A - D) of a plant, such as those of China-Rose, were treated as follows : (A) coated with vaseline on its upper surface. (B) coated on the lower surface. (C) coated on both surfaces. (D) left uncoated. All the four leaves A, B, C and D were left in a room for about 24 hours. (i) Which leaf would become most limp ? Why ? (ii) Which leaf would show least limping ? Why ?

Answer»

In an experiment, four freshly plucked leaves (A - D) of a plant, such as those of China-Rose, were treated as follows :

(A) coated with vaseline on its upper surface.

(B) coated on the lower surface.

(C) coated on both surfaces.

(D) left uncoated.

All the four leaves A, B, C and D were left in a room for about 24 hours.

(i) Which leaf would become most limp ? Why ?

(ii) Which leaf would show least limping ? Why ?

11392.

It is a misconception that: 1. Sex is determined by the vigor of a male. 2. Males are responsible for sex of a child. 3. Sex is determined by choice. 4. Women are not responsible for the sex of a child.

Answer»
It is a misconception that:
1. Sex is determined by the vigor of a male.
2. Males are responsible for sex of a child.
3. Sex is determined by choice.
4. Women are not responsible for the sex of a child.
11393.

______ produces a yellowish green fluid called bile.

Answer»

______ produces a yellowish green fluid called bile.

11394.

The respiratory and cardiac centres are located in.

Answer»

The respiratory and cardiac centres are located in.


11395.

Out of the following, what could be the reason for dwarfism?

Answer» Out of the following, what could be the reason for dwarfism?
11396.

Define reproduction. How does it help in providing stabilityto the population of species ?

Answer» Define reproduction. How does it help in providing stabilityto the population of species ?
11397.

Due to low atmospheric pressure, the rate of transpiration will

Answer»

Due to low atmospheric pressure, the rate of transpiration will


11398.

___ is a long-term endocrine disorder in which the adrenal glands do not produce enough steroid hormones.

Answer»

___ is a long-term endocrine disorder in which the adrenal glands do not produce enough steroid hormones.


11399.

Which of the following plant growth regulators promotes the production of latex flow in rubber plants?

Answer»

Which of the following plant growth regulators promotes the production of latex flow in rubber plants?


11400.

What is the role of the electron transport system in the light-dependent pathway of photosynthesis

Answer»

What is the role of the electron transport system in the light-dependent pathway of photosynthesis