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4001.

How does the evolutionary perspective explain the biological basis of behaviour?

Answer»

How does
the evolutionary perspective explain the biological basis of
behaviour?

4002.

If a ripe apple is kept in a basket with unripe apples it causes the ripening of all the unripe ones . How?

Answer» If a ripe apple is kept in a basket with unripe apples it causes the ripening of all the unripe ones . How?
4003.

What is autotrophic mode of nutrition? Give some example of autotrophs. [2 MARKS]

Answer» What is autotrophic mode of nutrition? Give some example of autotrophs. [2 MARKS]
4004.

___________ are DNA threads which appear inside the nucleus at the time of cell division.

Answer»

___________ are DNA threads which appear inside the nucleus at the time of cell division.


4005.

A plant cell burst when the:

Answer»

A plant cell burst when the:


4006.

Without pollination fertilisation will not occur. Explain

Answer» Without pollination fertilisation will not occur. Explain
4007.

Which of the following is not the characteristic of food chain?

Answer»

Which of the following is not the characteristic of food chain?


4008.

When a person is caught with fire, he or she is wrapped in a thick blanket so as to

Answer»

When a person is caught with fire, he or she is wrapped in a thick blanket so as to


4009.

(a) How is small intestine designed to absorb the digested food efficiently?(b) What would be the consequences of a deficiency of haemoglobin in our bodies?​(c) Why should the forests and wildlife be conserved?

Answer» (a) How is small intestine designed to absorb the digested food efficiently?

(b) What would be the consequences of a deficiency of haemoglobin in our bodies?

​(c) Why should the forests and wildlife be conserved?
4010.

What is the difference between anarobic and aerobic respiration

Answer»

What is the difference between anarobic and aerobic respiration

4011.

enormous turnip old man old woman pulled

Answer» enormous turnip old man old woman pulled
4012.

Fill in the blanks:(c) Fertilisation is in humans (external/internal)

Answer» Fill in the blanks:

(c) Fertilisation is in humans (external/internal)
4013.

Find the words from the final part of the above article that you have just finished reading which mean the same as the words or group of words given below.(a) Vital, very important (para 1): _____________________________(b) the quality of being prone to or open to dangers, like a disease or infection or a weakness (para 1): _____________________________(c) a wide range (para)1): _____________________________(d) very badly, in a damaging way (para 4): _____________________________(e) a problem that has persisted for quite some time (para 5):

Answer»

Find the words from the final part of the above article that you have just finished reading which mean the same as the words or group of words given below.



(a) Vital, very important (para 1): _____________________________



(b) the quality of being prone to or open to dangers, like a disease or infection or a weakness (para 1): _____________________________



(c) a wide range (para)1): _____________________________



(d) very badly, in a damaging way (para 4): _____________________________



(e) a problem that has persisted for quite some time (para 5):

4014.

How does ear convert sound waves into neural impulses, which are sensed and processed by the brain enabling us to recognise a sound ?

Answer» How does ear convert sound waves into neural impulses, which are sensed and processed by the brain enabling us to recognise a sound ?
4015.

Passage cells are thin-walled cells found in?

Answer»

Passage cells are thin-walled cells found in?


4016.

(a) What do you understand by the term 'variation ' ? (b) Name two human traits which show variation. (c) How does the creation of variation in a species ensure its survival ?

Answer»

(a) What do you understand by the term 'variation ' ?

(b) Name two human traits which show variation.

(c) How does the creation of variation in a species ensure its survival ?

4017.

Write the constituents present in blood but not present in- 1)Lymph 2)Interstitial fluid

Answer» Write the constituents present in blood but not present in- 1)Lymph 2)Interstitial fluid
4018.

75.How microtubules are formed in plants?

Answer» 75.How microtubules are formed in plants?
4019.

Mammals are found in which of the following habitats?

Answer»

Mammals are found in which of the following habitats?


4020.

Question 18Which of the following feature will help you in distinguishing a plant cell from an animal cell?(a) cell wall(b) cell membrane(c) mitochondria(d) nucleus

Answer» Question 18

Which of the following feature will help you in distinguishing a plant cell from an animal cell?



(a) cell wall

(b) cell membrane

(c) mitochondria

(d) nucleus
4021.

Malfunction of lymph vessels of gastrointestinal tract can result in ___

Answer»

Malfunction of lymph vessels of gastrointestinal tract can result in ___


4022.

Which among the following is not a green house gas?

Answer»

Which among the following is not a green house gas?

4023.

An aphid pierces its proboscis into the___to get plant juices.

Answer» An aphid pierces its proboscis into the___to get plant juices.
4024.

Are subphylum urochordata and subphylum cephalochordata included in invertebrates?

Answer» Are subphylum urochordata and subphylum cephalochordata included in invertebrates?
4025.

Find out my partner. Group 'A' Group 'B' 1. Heart beats a. 350 ml 2. RBC b. 7.4 3 WBC c. 37∘C 4 Blood donation d. 72 5 Normal body Temperature e. 50-60 lakh/mm3 6 pH of oxygenated blood f. 5000-6000 per mm3

Answer» Find out my partner.































Group 'A' Group 'B'
1. Heart beats a. 350 ml
2. RBC b. 7.4
3 WBC c. 37C
4 Blood donation d. 72
5 Normal body Temperature e. 50-60 lakh/mm3
6 pH of oxygenated blood f. 5000-6000 per mm3
4026.

Common features of respiratory organs

Answer» Common features of respiratory organs
4027.

Under the condition of dim light, the pupils __________.

Answer»

Under the condition of dim light, the pupils __________.


4028.

Explain briefly about DNA?????????

Answer» Explain briefly about DNA?????????
4029.

Which receptors receive signals in the following situations? Smelling delicious food Closing eyes when exposed to bright light Hearing good music Touching a hot object Eating a candy

Answer» Which receptors receive signals in the following situations?

  1. Smelling delicious food

  2. Closing eyes when exposed to bright light

  3. Hearing good music

  4. Touching a hot object

  5. Eating a candy



4030.

Question 2Two pink coloured flowers on crossing resulted in 1 red, 2 pink and 1 white flower progeny. The nature of the cross will be(a) double fertilisation(b) self pollination(c) cross fertilisation(d) no fertilisation

Answer»

Question 2

Two pink coloured flowers on crossing resulted in 1 red, 2 pink and 1 white flower progeny. The nature of the cross will be



(a) double fertilisation

(b) self pollination

(c) cross fertilisation

(d) no fertilisation



4031.

Identify the location of genetic material inside a eukaryotic cell.

Answer»

Identify the location of genetic material inside a eukaryotic cell.

4032.

In a historical experiment to determine Planck’s constant

Answer» In a historical experiment to determine Planck’s constant
4033.

Explain about pitutary hormones.

Answer» Explain about pitutary hormones.
4034.

Which of the following is true about gene therapy?

Answer»

Which of the following is true about gene therapy?



4035.

How does chemical coordination take place in animals? [3 MARKS]

Answer»

How does chemical coordination take place in animals? [3 MARKS]

4036.

Loudness of sound from a point source is 40 dB at 1m. Loudness reduces to 20 dB at a dis†an ce from the point source which is equal to

Answer» Loudness of sound from a point source is 40 dB at 1m. Loudness reduces to 20 dB at a dis†an ce from the point source which is equal to
4037.

Tests show that the urine of a patient contains sugar. What disease is the patient suffering from?

Answer» Tests show that the urine of a patient contains sugar. What disease is the patient suffering from?
4038.

The gametes produced by Mendel’s F1 dihybrid are

Answer»

The gametes produced by Mendel’s F1 dihybrid are


4039.

How are characters transferred from parents to offsprings? [2 MARKS]

Answer»

How are characters transferred from parents to offsprings? [2 MARKS]

4040.

Given below are assertion and reason. Point out if both are true with reason being correct explanation (A), both true but reason isnot correct explanation (B) , assertion true but reason is wrong (C), both are wrong (D) . Assertion: Phase of cell division is also known as formative phase. Reason: In formative phase new cells are produced from pre–existing cells through meiosis. \N

Answer»

Given below are assertion and reason. Point out if both are true with reason being correct explanation (A), both true but reason isnot correct explanation (B) , assertion true but reason is wrong (C), both are wrong (D) .

Assertion: Phase of cell division is also known as formative phase.

Reason: In formative phase new cells are produced from pre–existing cells through meiosis.


  1. \N
4041.

DRAW THE STRUCTURE OF CHROMOSOME ?

Answer» DRAW THE STRUCTURE OF CHROMOSOME ?
4042.

The function of testis in males is __________.

Answer»

The function of testis in males is __________.


4043.

How are veins and arteries connected to each other?

Answer»

How are veins and arteries connected to each other?

4044.

What are fossils? What do they tell us about the process of evolution?

Answer» What are fossils? What do they tell us about the process of evolution?
4045.

What is the other name of rabies?

Answer»

What is the other name of rabies?

4046.

What are the three types of nerves?

Answer» What are the three types of nerves?
4047.

Write the functions of following reproductive organs in humans: a. Ovary b. Seminal vesicle c. Placenta d. Testes e. Uterus

Answer»

Write the functions of following reproductive organs in humans:

a. Ovary

b. Seminal vesicle

c. Placenta

d. Testes

e. Uterus

4048.

Zygote life cycle and gaemate life cycle

Answer» Zygote life cycle and gaemate life cycle
4049.

What happens if all the functions are controlled only by brain 🧠?

Answer»

What happens if all the functions are controlled only by brain 🧠?

4050.

BMI is a method of finding out which of the following?

Answer»

BMI is a method of finding out which of the following?