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9501.

Question 4 What processes would you consider essential for maintaining life?

Answer»

Question 4
What processes would you consider essential for maintaining life?

9502.

Which of the following is/are the function(s) of the parasympathetic system?

Answer»

Which of the following is/are the function(s) of the parasympathetic system?


9503.

Choose the odd pair out.

Answer»

Choose the odd pair out.


9504.

If a person faces a scary situation, his heart beat increases. After a while, the normalcy is restored. The part of nervous system which helps in restoring normalcy is ____________________.

Answer»

If a person faces a scary situation, his heart beat increases. After a while, the normalcy is restored. The part of nervous system which helps in restoring normalcy is ____________________.


9505.

Plant tissue culture is a redefined method of:

Answer» Plant tissue culture is a redefined method of:
9506.

The cell which gives rise to all other types of cells present in the multicellular organism are called ______.

Answer»

The cell which gives rise to all other types of cells present in the multicellular organism are called ______.


9507.

The gene for red hair is recessive to the gene for black hair. What will be the hair colour of a person if he inherits a gene for red hair from his mother and a gene for black hair from his father?

Answer»

The gene for red hair is recessive to the gene for black hair. What will be the hair colour of a person if he inherits a gene for red hair from his mother and a gene for black hair from his father?

9508.

State whether the following statements are true or false. Rewrite the false statements by changing the first or the last word only. [5 MARKS] (a) Penicillin is an example of a sulphonamide. (b) The Red Cross supplies blood to victims of natural disaster. (c) Bleeding can usually be stopped by the application of cold water. (d) DPT vaccination is against diphtheria, pertussis and typhoid. (e) A disinfectant can be applied on a wound to prevent infection.

Answer» State whether the following statements are true or false. Rewrite the false statements by changing the first or the last word only. [5 MARKS]
(a) Penicillin is an example of a sulphonamide.
(b) The Red Cross supplies blood to victims of natural disaster.
(c) Bleeding can usually be stopped by the application of cold water.
(d) DPT vaccination is against diphtheria, pertussis and typhoid.
(e) A disinfectant can be applied on a wound to prevent infection.
9509.

___ hormone is often named as the emergency hormone.

Answer»

___ hormone is often named as the emergency hormone.


9510.

Which of the following stem cells can be extracted from early embryo which is developed by in vitro fertilization?

Answer»

Which of the following stem cells can be extracted from early embryo which is developed by in vitro fertilization?


9511.

Which nervous system prepares people to deal with frightening or stressful situations?

Answer»

Which nervous system prepares people to deal with frightening or stressful situations?


9512.

The following vegetables are kept in a basket: Potato, Tomato, Radish, Brinjal, Carrot, Bottle-gourd. Which two of these vegetables correctly represent the homologous structures? (a) Carrot and Tomato (b) Potato and Brinjal (c) Radish and Carrot (d) Radish and Bottle-gourd

Answer» The following vegetables are kept in a basket: Potato, Tomato, Radish, Brinjal, Carrot, Bottle-gourd. Which two of these vegetables correctly represent the homologous structures?
(a) Carrot and Tomato
(b) Potato and Brinjal
(c) Radish and Carrot
(d) Radish and Bottle-gourd
9513.

Explain the following: [3 MARKS] (a) Role of insulin in maintaining blood sugar level. (b) Acceleration of body growth during puberty. (c) Regulation of secondary sexual characters by the pituitary gland.

Answer» Explain the following: [3 MARKS]
(a) Role of insulin in maintaining blood sugar level.
(b) Acceleration of body growth during puberty.
(c) Regulation of secondary sexual characters by the pituitary gland.
9514.

Question 5 (b) Tick the correct answer: (b) During heavy exercise, we get cramps in the legs due to the accumulation of (i) carbon dioxide (ii) lactic acid (iii) alcohol (iv) water

Answer»

Question 5 (b)
Tick the correct answer:
(b) During heavy exercise, we get cramps in the legs due to the accumulation of
(i) carbon dioxide
(ii) lactic acid
(iii) alcohol
(iv) water

9515.

Which of the following is an excretory organ?

Answer»

Which of the following is an excretory organ?


9516.

What are the different modes of nutrition?

Answer»

What are the different modes of nutrition?

9517.

The chromosome number of the sexually reproductive parent and their offspring is the same. Justify the statement

Answer» The chromosome number of the sexually reproductive parent and their offspring is the same. Justify the statement
9518.

What is back suction?

Answer»

What is back suction?

9519.

What is the three types of papillae?

Answer»

What is the three types of papillae?

9520.

The following diagram represents the female reproductive system of a human being. [5 MARKS] (a) Name the parts numbered 1 to 6. (b) Normally after how many days does an ovary release an egg? (c) What do the sperms do after being released? (d) What is the function of the organ numbered 5? (e) How many days does it normally take from fertilization of the egg up to the birth of the baby?

Answer» The following diagram represents the female reproductive system of a human being. [5 MARKS]

(a) Name the parts numbered 1 to 6.
(b) Normally after how many days does an ovary release an egg?
(c) What do the sperms do after being released?
(d) What is the function of the organ numbered 5?
(e) How many days does it normally take from fertilization of the egg up to the birth of the baby?
9521.

Mention 5 changes seen in boys during adolescence. [5 MARKS]

Answer» Mention 5 changes seen in boys during adolescence. [5 MARKS]
9522.

The closest ancestor of modern human beings were called

Answer» The closest ancestor of modern human beings were called
9523.

Assertion (A) – RBCs are circular and biconcave in shape lacking all cell organelles. Reason (R) - Circular and biconcave shape increase the surface area for oxygen binding and the lack of organelles results in no utilisation of the oxygen being carried.

Answer»

Assertion (A) – RBCs are circular and biconcave in shape lacking all cell organelles.

Reason (R) - Circular and biconcave shape increase the surface area for oxygen binding and the lack of organelles results in no utilisation of the oxygen being carried.


9524.

What part of the brain : (a) enables us to remember a person's face. (b)helps us to pick up a pin on the floor

Answer»

What part of the brain :

(a) enables us to remember a person's face.

(b)helps us to pick up a pin on the floor

9525.

Find the odd one out and name the category to which the others belong: Chlorophyll, haemoglobin, rhodopsin, glucose

Answer» Find the odd one out and name the category to which the others belong:
Chlorophyll, haemoglobin, rhodopsin, glucose
9526.

When the left atrium contracts so why the blood did not flow back to the pulmopulm vein ?

Answer»

When the left atrium contracts so why the blood did not flow back to the pulmopulm vein ?

9527.

Differentiate between homologous and analogous series?

Answer» Differentiate between homologous and analogous series?
9528.

What is Homeostasis ?

Answer» What is Homeostasis ?
9529.

Why is glomerulus necessary for nepheons?

Answer» Why is glomerulus necessary for nepheons?
9530.

What is chiasmata?

Answer»

What is chiasmata?

9531.

Sterilisation in male involves cutting and tying of_______.

Answer»

Sterilisation in male involves cutting and tying of_______.


9532.

What are the basic differences between the gametes of males and females.?

Answer»

What are the basic differences between the gametes of males and females.?

9533.

Describe any three potential applications of genetically modified plants. [3]

Answer» Describe any three potential applications of genetically modified plants. [3]
9534.

__ throughout the world is raising at an alarming rate.

Answer»

__ throughout the world is raising at an alarming rate.

9535.

(a) How many types of blood vessels are there in the human body ? Name them. (b) Why does the heart need valves ?

Answer»

(a) How many types of blood vessels are there in the human body ? Name them.
(b) Why does the heart need valves ?

9536.

The leaves of a plant first prepare food A by photosynthesis. Food A then gets converted into food B. What are A and B?

Answer»

The leaves of a plant first prepare food A by photosynthesis. Food A then gets converted into food B. What are A and B?

9537.

What is respiration ? Explain.

Answer» What is respiration ? Explain.
9538.

The peppered moth experiment in which black moths become predominant over white moths during industrial revolution demonstrates which of the following?

Answer»

The peppered moth experiment in which black moths become predominant over white moths during industrial revolution demonstrates which of the following?

9539.

What is the function of pollen grains in flowers?

Answer»

What is the function of pollen grains in flowers?

9540.

Eosinophils, neutrophils and basophils are considered as part of

Answer»

Eosinophils, neutrophils and basophils are considered as part of


9541.

The outer most covering of the brain is called

Answer»

The outer most covering of the brain is called


9542.

Question 10 The correct sequence of reproductive stages seen in flowering plants is (a) gametes, zygote, embryo, seedling (b) zygote, gametes, embryo, seedling (c) seedling, embryo, zygote, gametes (d) gametes, embryo, zygote, seedling

Answer»

Question 10
The correct sequence of reproductive stages seen in flowering plants is

(a) gametes, zygote, embryo, seedling
(b) zygote, gametes, embryo, seedling
(c) seedling, embryo, zygote, gametes
(d) gametes, embryo, zygote, seedling

9543.

How does reproduction help in providing stability to the populations of a species?

Answer»

How does reproduction help in providing stability to the populations of a species?

9544.

Explain is natural and artificial propagation. [5 MARKS]

Answer»

Explain is natural and artificial propagation. [5 MARKS]

9545.

Characters that are transmitted from parents to offspring during sexual reproduction show : (a) only similarities with parents (b) only variations with parents (c) both similarities and variations with parents (d) neither similarities nor variations with parents

Answer»

Characters that are transmitted from parents to offspring during sexual reproduction show :
(a) only similarities with parents
(b) only variations with parents
(c) both similarities and variations with parents
(d) neither similarities nor variations with parents

9546.

What is the name of the process in which thickened uterus lining along with blood vessels is removed from the body of a human female through vaginal bleeding?

Answer»

What is the name of the process in which thickened uterus lining along with blood vessels is removed from the body of a human female through vaginal bleeding?

9547.

Chromosomal theory of inheritance explains

Answer»

Chromosomal theory of inheritance explains


9548.

Salk vaccine is given to prevent which disease?

Answer»

Salk vaccine is given to prevent which disease?


9549.

Which of the follwing statements are not true?

Answer»

Which of the follwing statements are not true?


9550.

The product formed during first biological oxidation in glycolysis is ______.

Answer»

The product formed during first biological oxidation in glycolysis is ______.