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4601.

__ Releasing Hormone secreted by the hypothalamus initiates changes at puberty in women.

Answer»

__ Releasing Hormone secreted by the hypothalamus initiates changes at puberty in women.

4602.

Identify the part labeled P.

Answer»

Identify the part labeled P.


4603.

What part of the cell serves as the intracellular highway?

Answer» What part of the cell serves as the intracellular highway?
4604.

Write a short note on pineal body?

Answer» Write a short note on pineal body?
4605.

Please send me a picture of good quality notes?

Answer» Please send me a picture of good quality notes?
4606.

Why rotis get inflated on heating ?

Answer»

Why rotis get inflated on heating

?

4607.

Why are good quality seeds preferred? Enumerate the salient features of a good quality seed? [3 MARKS]

Answer» Why are good quality seeds preferred? Enumerate the salient features of a good quality seed? [3 MARKS]
4608.

Generally, blood vessels which carry oxygenated blood are called ___ and blood vessels which carry deoxygenated blood are called ___

Answer»

Generally, blood vessels which carry oxygenated blood are called ___ and blood vessels which carry deoxygenated blood are called ___


4609.

The simplest way to distinguish a prokaryotic cell from a eukaryotic cell is to check for

Answer»

The simplest way to distinguish a prokaryotic cell from a eukaryotic cell is to check for


4610.

Which of these is a definite source of water pollution?

Answer»

Which of these is a definite source of water pollution?


4611.

Write a short note on adam's apple. [3 MARKS]

Answer» Write a short note on adam's apple.
[3 MARKS]
4612.

​​​Milk contains lactic acid but it is a insulator Why?

Answer»

​​​Milk contains lactic acid but it is a insulator Why?

4613.

How can we preserve jams and jelly?

Answer» How can we preserve jams and jelly?
4614.

How do leguminous plants help in maintaining soil fertility?

Answer» How do leguminous plants help in maintaining soil fertility?
4615.

The method of transport of materials in single-celled and simple multicellular plants is

Answer»

The method of transport of materials in single-celled and simple multicellular plants is


4616.

Grain seeds are separated from chaff. This process is called as

Answer»

Grain seeds are separated from chaff. This process is called as


4617.

What is the specific term used for phytoplankton bloom in water?

Answer»

What is the specific term used for phytoplankton bloom in water?


4618.

To which kingdom do humans belong?

Answer»

To which kingdom do humans belong?


4619.

Arrange the following steps in order. i. Sperms survive for a short period in the vagina's acidic secretions. ii. The sperms travel through the uterus followed by the fallopian tube. iii. The sperms which survive reach the cervix. iv. The sperms then reach the egg for fertilization.

Answer» Arrange the following steps in order.

i. Sperms survive for a short period in the vagina's acidic secretions.
ii. The sperms travel through the uterus followed by the fallopian tube.
iii. The sperms which survive reach the cervix.
iv. The sperms then reach the egg for fertilization.
4620.

The source of irrigation among the following is:

Answer»

The source of irrigation among the following is:


4621.

Which of the following reproduce through external fertilisation?

Answer»

Which of the following reproduce through external fertilisation?

4622.

Sometimes during puberty, voice of some boys become hoarse. Why? [2 MARKS]

Answer»

Sometimes during puberty, voice of some boys become hoarse. Why?
[2 MARKS]

4623.

Which of the following agents does not help in storage?

Answer»

Which of the following agents does not help in storage?


4624.

What is the use of electrical impulses in our body?

Answer» What is the use of electrical impulses in our body?
4625.

Arrange the following events of binary fission in the correct sequence. 1. Segregation of genetic material copies to opposite side of the cells. 2. Division of cytoplasm. 3. Copying of genetic material. 4. Cell wall synthesis.

Answer»

Arrange the following events of binary fission in the correct sequence.

1. Segregation of genetic material copies to opposite side of the cells.

2. Division of cytoplasm.

3. Copying of genetic material.

4. Cell wall synthesis.


4626.

Which of the following secretions of the pituitary gland triggers development of secondary sexual characteristics in humans?

Answer»

Which of the following secretions of the pituitary gland triggers development of secondary sexual characteristics in humans?


4627.

Which of the following are bacterial biofertilisers?

Answer»

Which of the following are bacterial biofertilisers?


4628.

Dodo is

Answer»

Dodo is


4629.

What are Exploratory wells? What is peat? why is anthracite not found today?How was it useful?

Answer» What are Exploratory wells?

What is peat?

why is anthracite not found today?How was it useful?
4630.

Programmed cell death is called___ .

Answer» Programmed cell death is called___ .
4631.

Question 2 (f) The process of conversion of sugar into alcohol is called : a) nitrogen fixation b) moulding c) fermentation d) infection

Answer»

Question 2 (f)
The process of conversion of sugar into alcohol is called :

a) nitrogen fixation
b) moulding
c) fermentation
d) infection

4632.

Reservoirs, lakes, ponds, rivers and canals contain percentage of fresh water:

Answer»

Reservoirs, lakes, ponds, rivers and canals contain percentage of fresh water:


4633.

Which of these is the male sex cell in plants?

Answer»

Which of these is the male sex cell in plants?


4634.

Cellular components are coloured for better observation is called:

Answer» Cellular components are coloured for better observation is called:
4635.

Transpiration occurs through

Answer»

Transpiration occurs through


4636.

What is AIDS? Name the causative organism for AIDS. Write any one medium through which the virus is transmitted. [3 MARKS]

Answer» What is AIDS? Name the causative organism for AIDS. Write any one medium through which the virus is transmitted. [3 MARKS]
4637.

Write a short note on preparation of soil.

Answer»

Write a short note on preparation of soil.

4638.

Teichoic acid is found in the cell wall of:-

Answer»

Teichoic acid is found in the cell wall of:-


4639.

What is the name of the system that is being followed for naming different organisms?

Answer»

What is the name of the system that is being followed for naming different organisms?


4640.

What are prokaryotes and eukaryotes?

Answer»

What are prokaryotes and eukaryotes?

4641.

Which of the following are the main constituents of Protoplasm?

Answer»

Which of the following are the main constituents of Protoplasm?

4642.

A balanced diet is essential for adolescents. Which of the following complications may arise due to lack of balanced diet?

Answer»

A balanced diet is essential for adolescents. Which of the following complications may arise due to lack of balanced diet?


4643.

Who discovered the bacteria in seventeen century

Answer»

Who discovered the bacteria in seventeen century

4644.

Define winnowing .

Answer»

Define winnowing .

4645.

The scientist who said that cells arise from pre existing cells is

Answer»

The scientist who said that cells arise from pre existing cells is


4646.

The square root of a perfect square containing ‘n’ digits has ___ digits.

Answer» The square root of a perfect square containing ‘n’ digits has ___ digits.
4647.

Why even protected forests are not completely safe for wild animals ?

Answer»

Why even protected forests are not completely safe for wild animals ?

4648.

Name two food items each which provide mainly: (a) carbohydrates for energy (b) fats for energy (c) proteins for growth (d) vitamins and minerals for good health

Answer»

Name two food items each which provide mainly: (a) carbohydrates for energy (b) fats for energy (c) proteins for growth (d) vitamins and minerals for good health

4649.

Plants that perform photosynthesis are also called ____

Answer»

Plants that perform photosynthesis are also called ____


4650.

Find the correct match of both the columns. Machine/tool used Purpose (i) Sickle (a) Separating grain and chaff (ii) Harvester (b) Harvesting and threshing (iii) Winnowing machine (c) Manual harvesting (iv) Combine (d) Mechanical harvesting

Answer»

Find the correct match of both the columns.

Machine/tool used Purpose

(i) Sickle (a) Separating grain and chaff
(ii) Harvester (b) Harvesting and threshing
(iii) Winnowing machine (c) Manual harvesting
(iv) Combine (d) Mechanical harvesting