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451.

three rods of identical area of cross section and made from the same metal forms the sides of an isosceles triangle ABC,right angle at at B ,the point a and b are maintained at temp T and \sqrt2 T respectively.in the steady state the temp of the point C is Tc .assuming that only heat conductin takes place ,find TC/T

Answer» three rods of identical area of cross section and made from the same metal forms the sides of an isosceles triangle ABC,right angle at at B ,the point a and b are maintained at temp T and \sqrt2 T respectively.in the steady state the temp of the point C is Tc .assuming that only heat conductin takes place ,find TC/T
452.

How does camel store its excess fat

Answer»

How does camel store its excess fat

453.

Fill in the blanks. (a) Cells are considered to be the fundamental units of the ………… and ………… of living things. (b) The ………… of living things is suited to their ………… This is called ………… . (c) We see ………… types of organisation in an amoeba. (d) The ………… type of ecosystem can be seen in the water in a puddle. (e) In a forest ecosystem the living constituents are ………… and ………… .

Answer»

Fill in the blanks.



(a) Cells are considered to be the fundamental units of the ………… and ………… of living things.



(b) The ………… of living things is suited to their ………… This is called ………… .



(c) We see ………… types of organisation in an amoeba.



(d) The ………… type of ecosystem can be seen in the water in a puddle.



(e) In a forest ecosystem the living constituents are ………… and ………… .

454.

Is outcross also help to find the genotypic composition or organism?

Answer» Is outcross also help to find the genotypic composition or organism?
455.

Animals that spends their lives fixed to a substratum

Answer»

Animals that spends their lives fixed to a substratum

456.

What role does the filament play in a flower?

Answer»

What role does the filament play in a flower?


457.

What is the function of the nephron?

Answer» What is the function of the nephron?
458.

what is shielding efect?

Answer» what is shielding efect?
459.

___ is a slipper-shaped protozoan

Answer»

___ is a slipper-shaped protozoan


460.

How is food taken inside our body when we stand upside down

Answer»

How is food taken inside our body when we stand upside down

461.

An infectious disease is one that:

Answer»

An infectious disease is one that:



462.

How many organs are in the respiratory system?

Answer» How many organs are in the respiratory system?
463.

In the sketch of stomatal apparatus given alongside, the parts I, II, III and IV were labelled differently by four students. The correct labelling is shown in : (1) (I) guard cells, (II) stoma, (III) starch granule, (IV) nucleus(2) (I) cytoplasm, (II) nucleus, (III) stoma, (IV) chloroplast(3) (I) guard cells, (II) starch, (III) nucleus, (IV) stoma(4) (I) cytoplasm, (II) chloroplast, (III) stoma, (IV) nucleus

Answer» In the sketch of stomatal apparatus given alongside, the parts I, II, III and IV were labelled differently by four students. The correct labelling is shown in :







(1) (I) guard cells, (II) stoma, (III) starch granule, (IV) nucleus

(2) (I) cytoplasm, (II) nucleus, (III) stoma, (IV) chloroplast

(3) (I) guard cells, (II) starch, (III) nucleus, (IV) stoma

(4) (I) cytoplasm, (II) chloroplast, (III) stoma, (IV) nucleus
464.

Define: Heartbeat and heart rate

Answer» Define: Heartbeat and heart rate
465.

Question 2 Distinguish between a parasite and a saprotroph.

Answer»

Question 2
Distinguish between a parasite and a saprotroph.

466.

In cutting method of vegetative propagation, cuttings are mainly taken from:

Answer»

In cutting method of vegetative propagation, cuttings are mainly taken from:


467.

___ is an important hormone produced by the pancreas that helps in regulation of blood sugar level.

Answer» ___ is an important hormone produced by the pancreas that helps in regulation of blood sugar level.
468.

Prove with the help of an experiment that carbon dioxide is necessary for photosynthesis.

Answer»

Prove with the help of an experiment that carbon dioxide is necessary for photosynthesis.

469.

Seeds obtained by hybridization combine advantages, disadvantages and some other mixed qualities of both the parent plants. How are the seeds with desirable qualities obtained?

Answer»

Seeds obtained by hybridization combine advantages, disadvantages and some other mixed qualities of both the parent plants. How are the seeds with desirable qualities obtained?


470.

How water and minerals are transported in plants?

Answer»

How water and minerals are transported in plants?

471.

What are the causes of protozoan diseases ?

Answer» What are the causes of protozoan diseases ?
472.

The summit of Mount Everest (Sagarmatha) is at 8848 m above sea level whereas climbing camp 2 is at 6610 m above sea level. Which is colder, Summit or Camp 2? ___.

Answer»

The summit of Mount Everest (Sagarmatha) is at 8848 m above sea level whereas climbing camp 2 is at 6610 m above sea level. Which is colder, Summit or Camp 2?
___
.

473.

Boojho had the following parts of a rose plant -a leaf, roots, a branch, a flower, a bud and pollen grains, which of them can be used to grow a new rose plant?

Answer»

Boojho had the following parts of a rose plant -a leaf, roots, a branch, a flower, a bud and pollen grains, which of them can be used to grow a new rose plant?

474.

Amphibians have __ chambered heart.

Answer»

Amphibians have __ chambered heart.

475.

Write a brief account on digestion? [3 MARKS]

Answer»

Write a brief account on digestion? [3 MARKS]

476.

People from the municipality come and collect garbage from your building. Where do you think all the garbage goes at the end?

Answer»

People from the municipality come and collect garbage from your building. Where do you think all the garbage goes at the end?


477.

We know that the lever is the largest gland of our body. ​But which is the smallest internal organ of our body then?

Answer» We know that the lever is the largest gland of our body.
​But which is the smallest internal organ of our body then?
478.

I transport food in plants. I am __.

Answer»

I transport food in plants. I am __.

479.

Why is it more effective to breathe through the nose compared to the mouth?

Answer» Why is it more effective to breathe through the nose compared to the mouth?




480.

Question 10 A carnivore with stripes on its body moves very fast while catching its prey. It is likely to be found in (i) polar regions (ii) deserts (iii) oceans (iv) tropical rainforests

Answer» Question 10
A carnivore with stripes on its body moves very fast while catching its prey. It is likely to be found in
(i) polar regions
(ii) deserts
(iii) oceans
(iv) tropical rainforests
481.

Which of the following statement(s) is/are correct about the process of pollination?

Answer»

Which of the following statement(s) is/are correct about the process of pollination?


482.

Match the following. S. No. Group ‘A’ S. No. Group ‘B’ (a) A, B, AB and O 1. blood transfusion (b) a kind of tube 2. blood circulation (c) an independent and closed system 3. blood groups 4. blood vessels

Answer»

Match the following.







































S. No.



Group ‘A’



S. No.



Group ‘B’



(a)



A, B, AB and O



1.



blood transfusion



(b)



a kind of tube



2.



blood circulation



(c)



an independent and closed system



3.



blood groups







4.



blood vessels




483.

Where do cell organelles lie in the cell?

Answer»

Where do cell organelles lie in the cell?



484.

If kidneys of a person fail to perform their function, what type of alternative solution could be provided by the doctor?

Answer» If kidneys of a person fail to perform their function, what type of alternative solution could be provided by the doctor?
485.

The most important worldwide disease transmitted by mosquito to human is ______________

Answer»

The most important worldwide disease transmitted by mosquito to human is ______________


486.

Name few healthy food items that you are eating daily as part of your balanced diet.

Answer» Name few healthy food items that you are eating daily as part of your balanced diet.
487.

Yeast reproduces rapidly and produces ___ and alcohol during fermentation.

Answer»

Yeast reproduces rapidly and produces ___ and alcohol during fermentation.



488.

Deficiency of vitamin D results in:

Answer»

Deficiency of vitamin D results in:


489.

Which type of allergy has a symptom of swelling in the area of the sting and the area around this?

Answer»

Which type of allergy has a symptom of swelling in the area of the sting and the area around this?


490.

An example of a biocatalyst is

Answer»

An example of a biocatalyst is



491.

In what way is the basic structure of the stomach of a cow different from the stomach of a human?

Answer» In what way is the basic structure of the stomach of a cow different from the stomach of a human?
492.

Which of these could be helpful in predicting rainfall?

Answer»

Which of these could be helpful in predicting rainfall?


493.

How does amoeba captures food

Answer»

How does amoeba captures food

494.

Calculate the average minimum temperature and minimum humidity of a place from the given table (weather data of a week). Choose the correct option. The first number represents average minimum temperature and the second number represents average minimum humidity. DateMax.~Temp.oC Min.~Temp. oC Min.~Humidity(%)Max.~ Humidity(%)23−08−0636.228548224−08−0635.127538425−08−0637.427548726−08−063824588327−08−0637.223527928−08−0634.922517229−08−0635.5275285Average36.32??81.71

Answer»

Calculate the average minimum temperature and minimum humidity of a place from the given table (weather data of a week). Choose the correct option. The first number represents average minimum temperature and the second number represents average minimum humidity.

DateMax.~Temp.oC Min.~Temp. oC Min.~Humidity(%)Max.~ Humidity(%)23080636.228548224080635.127538425080637.42754872608063824588327080637.223527928080634.922517229080635.5275285Average36.32??81.71


495.

Smog is a mixture of

Answer»

Smog is a mixture of


496.

To prevent a disease caused by a certain microbe, doctors inject the same microbes in a person's blood. How is it ensured that this prevents the disease instead of causing it? What is this process of injecting microbes called?

Answer» To prevent a disease caused by a certain microbe, doctors inject the same microbes in a person's blood. How is it ensured that this prevents the disease instead of causing it? What is this process of injecting microbes called?
497.

The organs responsible for reproduction in most of the plants are called _______.

Answer»

The organs responsible for reproduction in most of the plants are called _______.


498.

Name four symptoms of Beri Beri or Vitamin B1/Thiamine deficiency. [2 MARKS]

Answer» Name four symptoms of Beri Beri or Vitamin B1/Thiamine deficiency. [2 MARKS]

499.

The protein that gives the red colour to blood is called _____ .

Answer»

The protein that gives the red colour to blood is called _____ .


500.

Shown below are few things we use in our day to day life. Identify them and classify them into natural and synthetic fibres. Define synthetic fibres. [5 MARKS]

Answer»

Shown below are few things we use in our day to day life. Identify them and classify them into natural and synthetic fibres. Define synthetic fibres. [5 MARKS]