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Biology - Science Questions asked by Filo students

Question 21

Extensively used in medicine 3. Fill in the Blanks :

............. causes discomfort and may lead to temporary or permanent damage to hearning.
Most of the diseases occuring in human beings are due to
..... is festival of planting trees.
..... of wildlife disturbs the balance of nature.
Natural bioleaching can lead to formation of

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Biology

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Question 22

.4. Say True or False :

Transportation sector pases the biggest and toughest challenge for India.
Worldwide fund for nature was set up in India in $1979.$
Energy resources can broadly be divided into two forms-conventional and non-conventional source of energy.
A hazard is a natural event while the disaster is its consequence.
The ozone layer is not associated with global warning.

Topic:

Biology

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Question 23

Q.5. Give the answers One word only :

Which hazards are also caused due to one's occupation or employment?
A variety in the genetic makeup among individuals within a species is known as.
Which is play an important role in controlling carbon dioxide in the environment?
Which pollution is indication of disturbances to the composition of compounds in the atmpsphere?
Which ray radiation is natural radiation?

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Biology

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Question 24

The large number of pores present in the body of Sycon is

Ostia
Osculum
Tentacles
None of these

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Biology

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Question 25

46 = 2 : 56

ㄴㅜㄴㅇㅠㄹ

(g)) Zoom

v

Leave e Acrobat Reader DC (64-bit)

elp

test p...

x

I.FILL IN THE BLANKS:-

[1 \times 6 = 6]

Inhalation of pollen grains cause an allergic reaction called
Sting of can cause allergic reactions.

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Biology

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Question 26

3.Peanut, milk and egg can act as allergens.

Harmful microorganisms that cause diseases are called
often medicines containing can lead to allergic reactions.
Allergies occur anytime throughout the year are called

Topic:

Biology

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Question 27

Name the following:- [1X6=6]

Substances that cause allergy.
Harmful microorganisms that cause diseases.
The protection that someone's body gives them against a particular disease.
Red itchy patches on the skin.
A life-threatening condition in which the tissues swell up and make it difficult for the person to breathe.
Symptoms of allergy caused by the food allergens in the mouth and throat region.

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Biology

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Question 28

- Contact dermatitis IV. Answer the following: - [1X3=3]

Which are non-food allergens?
Define immunity

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Biology

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Question 29

10. Describe the threat to the beauty of the Taj Mahal. 11. Why does the increased level of nutrients in the water affect the survival of aquatic organisms?

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Biology

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Question 30

I Four alternatives are given for each of the following questions / incomplete statements. Choose the correct alternative and write the complete answer along with its letter of alphabet.

2 \times 1 = 2

1. The diameter of the reflecting surface of spherical mirror is

Optical Centre
Centre of Curvature
Aperture
Principal axis

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Biology

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Question 31

An electric motor takes

5 A

from a

220 V

electric source. The power of the motor is

$1100 W$
$44 W$
$225 W$
$440 W$

Topic:

Biology

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Question 32

8.3.3 (a) Male Reproductive System The male reproductive system (Fig. 8.10) consists of portions which produce the germ-cells and other portions that deliver the germ-cells to the site of fertilisation.

{"The formation of germ-cells or sperms takes place in the testes. These are located outside the abdominal cavity in scrotum because sperm formation requires a lower temperature than the normal body temperature. We have discussed the role of the testes in the secretion of the hormone, testosterone, in the previous chapter. In addition to regulating the formation of sperms, testosterone brings about changes in appearance seen in boys at the time of puberty.","The sperms formed are delivered through the vas deferens which unites with a tube coming from the urinary bladder. The urethra thus forms a common passage for both the sperms and urine. Along the path of the vas deferens, glands like the prostate and the seminal vesicles add their secretions so that the sperms are now in a fluid which makes their transport easier and this fluid also provides nutrition. The sperms are tiny bodies that consist of mainly genetic material and a long tail that helps them to move towards the female germ-cell."," $8.3.3$ (b) Female Reproductive System","The female germ-cells or eggs are made in the ovaries. They are also responsible for the production of some hormones. Look at Pig $8.11$ and identify the various organs in the female reproductive system."}

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Biology

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Question 33

Value of '

g

' is when object is at infinite distance from earth.

Double
Half
Zero
More

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Biology

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Question 34

The number of electrons in the outermost shell of alkali metals is

Topic:

Biology

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Question 35

The vapour content in the air is measured using a physical quantity called

Absolute humidity
Relative humidity
Humidity
Latent heat

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Biology

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Question 36

The process of separation of light into its component colours is called

\dots

of light.

Scattering
Dispersion
Refraction
Reflection

Topic:

Biology

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Question 37

The element is obtained by reduction of its oxide.

Zinc
Aluminium
Sodium
Potassium

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Biology

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Question 38

Given below are five sets of terms. In each case arrange and rewrite each set as to be in a logical sequence.

Oesophagus, Large intestine, Mouth, Small intestine, Stomach.
Kidney, Posterior vena cava, Renal artery, Aorta, Renal vein.
Fallopian tube, Uterus, Cervix, Ovary, Ovum.
Stomach, Liver, pancreas, Salivary glands, Gall bladder.
Ear ossicles, Auditory nerve, Eardrum, Ampulla, Cochlea.

Topic:

Biology

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Question 39

Select one suitable word from three alternatives given to fill in the blanks in the following sentences. [5]

is a general state of awareness of a stimulus. (Touch / feeling / sensation)
Most transpiration occurs in herbaceous plants through
In rainy season wooden doors usually swell up due to (diffusion / imbibition / osmosis)
Hay fever is a type of (stomata called
When there is morgy / (allergy / cancer / defiency diseases)

Topic:

Biology

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Question 40

(allergy / cancer / deficiency diseases) he cell from the outside medium, the medium is considered as to the cell sap. (d) Match the items of Column A with those in Column B and rewrite the correct matching pairs : Column A Column B