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1451.

Which of these stem modifications are seen in aquatic plants?

Answer»

Which of these stem modifications are seen in aquatic plants?


1452.

menustructural cycle

Answer» menustructural cycle
1453.

What part of the cell can be called the 'brain' of the cell? Why?

Answer» What part of the cell can be called the 'brain' of the cell? Why?
1454.

Among a circular dna and linear dna of same size , which one will reach more nearer towards anode in gel electrophoresi and why

Answer» Among a circular dna and linear dna of same size , which one will reach more nearer towards anode in gel electrophoresi and why
1455.

if a population grow exponentially doubles in size in 3 years ,what is is the intrinsic rate of increase (r) of the population a)33%b)80%c)100%d)10%

Answer» if a population grow exponentially doubles in size in 3 years ,what is is the intrinsic rate of increase (r) of the population
a)33%
b)80%
c)100%
d)10%
1456.

What does Z sacromeres do in locomotion,what is its specific function.

Answer» What does Z sacromeres do in locomotion,what is its specific function.
1457.

Question 15Animal husbandry is the scientific management of(i) Animal breeding(ii) Culture of animals(iii) Animal livestock(iv) Rearing of animals(a) (i), (ii) and (iii)(b) (ii), (iii) and (iv)(c) (i), (ii) and (iv)(d) (i), (iii) and (iv)

Answer»

Question 15

Animal husbandry is the scientific management of




(i) Animal breeding

(ii) Culture of animals

(iii) Animal livestock

(iv) Rearing of animals



(a) (i), (ii) and (iii)

(b) (ii), (iii) and (iv)

(c) (i), (ii) and (iv)

(d) (i), (iii) and (iv)



1458.

How can we see micro organisms through microscope?

Answer» How can we see micro organisms through microscope?
1459.

Question 2What is the significance of tissues in multi-cellular organisms?

Answer»

Question 2

What is the significance of tissues in multi-cellular organisms?




1460.

In 1928, a scientist discovered the first effective antibiotic. The scientist and antibiotic are ___.

Answer» In 1928, a scientist discovered the first effective antibiotic. The scientist and antibiotic are ___.
1461.

Which among the following helps in preventing constipation?

Answer»

Which among the following helps in preventing constipation?

1462.

Question 14Which is not an aquatic animal?(a) Hydra(b) Jelly fish(c) Corals(d) Filaria

Answer»

Question 14

Which is not an aquatic animal?




(a) Hydra

(b) Jelly fish

(c) Corals

(d) Filaria



1463.

Why does the taste of food change after chewing for a long time?

Answer» Why does the taste of food change after chewing for a long time?
1464.

The dominant generation in pteridophytes is

Answer»

The dominant generation in pteridophytes is



1465.

The following plants show _____ venation.

Answer»

The following plants show _____ venation.

1466.

Question 9 The mountaineers carry oxygen with them because: (a) At an altitude of more than 5 km there is no air. (b) The amount of air available to a person is less than that available on the ground. (c) The temperature of air is higher than that on the ground. (d) The pressure of air is higher than that on the ground.

Answer»

Question 9
The mountaineers carry oxygen with them because:
(a) At an altitude of more than 5 km there is no air.
(b) The amount of air available to a person is less than that available on the ground.
(c) The temperature of air is higher than that on the ground.
(d) The pressure of air is higher than that on the ground.

1467.

Name the four chambers of the heart.

Answer» Name the four chambers of the heart.
1468.

Boys have broader shoulders and wider chests compared to girls. This is because:

Answer»

Boys have broader shoulders and wider chests compared to girls. This is because:



1469.

What is the steric number?

Answer» What is the steric number?
1470.

Which of the following does not posses permanent dipole moment? CS2 so33- H2s So

Answer» Which of the following does not posses permanent dipole moment? CS2 so33- H2s So
1471.

What is the term used for waste that originates mainly from hospitals and clinics and includes blood, diseased organs, poisonous medicines, etc.

Answer»

What is the term used for waste that originates mainly from hospitals and clinics and includes blood, diseased organs, poisonous medicines, etc.


1472.

When will you use a simple microscope and when, a compound microscope? Explain in detail how you will use them.

Answer» When will you use a simple microscope and when, a compound microscope? Explain in detail how you will use them.
1473.

How many teeth are present in the lower jaw of human beings?

Answer»

How many teeth are present in the lower jaw of human beings?


1474.

Why do farmers use plant growth regulators?

Answer»

Why do farmers use plant growth regulators?


1475.

Why are the wounds on the body washed with salt solution?

Answer»

Why are the wounds on the body washed with salt solution?


1476.

Is an organ made up of only a single type of cell, or is it made up of different types of cells?

Answer» Is an organ made up of only a single type of cell, or is it made up of different types of cells?
1477.

Which of the following is not reabsorbed during urine formation?

Answer»

Which of the following is not reabsorbed during urine formation?


1478.

Where do frogs disappear in summer and winter?

Answer»

Where do frogs disappear in summer and winter?

1479.

Question 15Amphibians do not have the following(a) Three chambered heart(b) Gills or lungs(c) Scales(d) Mucus glands

Answer»

Question 15

Amphibians do not have the following




(a) Three chambered heart

(b) Gills or lungs

(c) Scales

(d) Mucus glands



1480.

__ is the common name for calcium sulphate with water of crystallization.

Answer»

__ is the common name for calcium sulphate with water of crystallization.

1481.

What is the meaning of Biology?

Answer» What is the meaning of Biology?
1482.

Name the disease caused by Vitamin C deficiency. What are the sources of this Vitamin ? [ 2 MARKS ]

Answer»

Name the disease caused by Vitamin C deficiency. What are the sources of this Vitamin ? [ 2 MARKS ]

1483.

Tick the correct answer: (a) In cockroaches, air enters the body through (i) lungs gills (iii) spiracles (iv) skin (b) During heavy exercise, we get cramps in the legs due to the accumulation of (i) carbon dioxide lactic acid alcohol (iv) water (c) Normal range of breathing rate per minute in an average adult person at rest is (i) 9-12 (ii) 15-18 (iii) 21-24 (iv) 30-33 (d) During exhalation, the ribs (i) move outwards (ii) move downwards (iii) move upwards (iv) do not move at all

Answer»

Tick the correct answer:


(a) In cockroaches, air enters the body through


(i) lungs



  1. gills



(iii) spiracles


(iv) skin


(b) During heavy exercise, we get cramps in the legs
due to the accumulation of


(i) carbon dioxide



  1. lactic acid




  1. alcohol



(iv) water


(c) Normal range of breathing rate per minute in an
average adult person at rest is


(i) 9-12


(ii) 15-18


(iii) 21-24


(iv) 30-33


(d) During exhalation, the ribs


(i) move outwards


(ii) move downwards


(iii) move upwards


(iv) do not move at all

1484.

Why do we all humans need to breathe ??

Answer»

Why do we all humans need to breathe ??

1485.

Which part of the given flower is anther?

Answer»

Which part of the given flower is anther?

1486.

Mention different types of glands, their functions and hormones secreted by them.

Answer»

Mention different types of glands, their functions and hormones secreted by them.

1487.

Which among the following microscopes use magnetic field to view specimens?

Answer»

Which among the following microscopes use magnetic field to view specimens?



1488.

What is a pivotal joint?

Answer» What is a pivotal joint?
1489.

What are the similarities between nutrition in amoeba and nutrition in paramecium?

Answer»

What are the similarities between nutrition in amoeba and nutrition in paramecium?


1490.

Identify the type of microbe that helps us prepare the following food items.

Answer»

Identify the type of microbe that helps us prepare the following food items.

1491.

If the O2 travels from alveoli to RBC n form HbO2 then how many cellular layers n how many cellular membranes it has to cross?

Answer» If the O2 travels from alveoli to RBC n form HbO2 then how many cellular layers n how many cellular membranes it has to cross?
1492.

How do the snake move?

Answer» How do the snake move?
1493.

Question 4In a neuron, conversion of electrical signal to a chemical signal occurs at/in(a) cell body(b) axonal end(c) dendritic end(d) axon

Answer»

Question 4

In a neuron, conversion of electrical signal to a chemical signal occurs at/in



(a) cell body

(b) axonal end

(c) dendritic end

(d) axon



1494.

Question 4 (c)What will happen if: The top layer of soil is exposed.

Answer» Question 4 (c)

What will happen if:

The top layer of soil is exposed.
1495.

What is euidiometry?

Answer» What is euidiometry?
1496.

Does both kidneys work simultaneously

Answer» Does both kidneys work simultaneously
1497.

for what concentration of Ag+ will the EMF of the cell be zero when concentration ofCu+2 is 0.01M E(Ag/Ag+)=0.8v and E(Cu+2/Cu)=0.34

Answer» for what concentration of Ag+ will the EMF of the cell be zero when concentration ofCu+2 is 0.01M E(Ag/Ag+)=0.8v and E(Cu+2/Cu)=0.34
1498.

Which of the following is not an example of a parasite?

Answer»

Which of the following is not an example of a parasite?

1499.

Describe the process of urine formation in kidneys.

Answer» Describe the process of urine formation in kidneys.
1500.

“Operation flood” is related to:

Answer» “Operation flood” is related to: