10th Class Biology Chapter 1 Short Questions with Answers Solved

Question: 1

What is acute bronchitis?

Answer: 1

1-133

It usually lasts about two weeks . It has no permanent damage.

Question: 2

What is diaphragm.

Answer: 2

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It is thick muscular, dome shaped strucute present below the lungs. It helps in breathing.

Question: 3

Define cellular respiration ?

Answer: 3

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Teh process in which the C-H bond of food is broken down into CO2 and H2O by using oxygen by oxidation reduction reaction is called cellular respiration.

Question: 4

Define breathing?

Answer: 4

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They physical movement associated with gaseous exchange is called breathing.

Question: 5

What is chronic bronchitis?

Answer: 5

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It usually lasts about three months to two years and it is develop by bronchi.

Question: 6

What trachea?

Answer: 6

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It is called wind pipe . IT IS 12cm long.There are C-shaped cartilaginous ring present in the wall of trachea.The cartilage keep the trachea in position and prevent it from collapsing even there is no air in it.

Question: 7

What is pneumonia?

Answer: 7

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It is an infection of lungs. If it effects both lungs is called double pneumonia.

Question: 8

What is glottis?

Answer: 8

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Glottis is a narrow opening at the floor of pharynx. Which leads into larynx.The air enters int the larynx through glottis.

Question: 9

Define gaseous exchange?

Answer: 9

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the process of taking oxygen in and given out CO2 is called gaseous exchange. It is 2 types Brething, celluar respiration

Question: 10

What are the causes of cancer?

Answer: 10

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i. Smoking ii. Ionizing radiation iii. Viral infection.

Question: 11

Waht is stomata?

Answer: 11

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Thesee are small opeing which are present in the leaves and young stem epidermis.These helps in exchange of gases

Question: 12

How many types of bronchitis?

Answer: 12

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Bronchitis are of two type. i. Acute bronchitis ii. Chronic bronchitis.

Question: 13

What are causes of bronchitis?

Answer: 13

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It is caused by viruses, bacteria or exposure to chemical irritants.

Question: 14

Define skeleton . Write its function .

Answer: 14

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Skeleton is framework of hard , articulated structures

Question: 15

Difference between inspiration and expiration.

Answer: 15

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Intake of air from atmosphere into lungs is called inspiration and in expiration impure air is expelled out.

Question: 16

What are bad effect of smoking?

Answer: 16

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1. Smoking causes cancer in kidney oral Cavity, larynx, breast, bladder. 2. Smoking effect air passage way. iii. Smoking effect circulatory system iv. Smoking cause arteriosclerosis and narrowing the arteries.

Question: 17

Name some respiratory disorders.

Answer: 17

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Bronchitis, Emphysema, Pneumonia, Asthma, Lungs cancer etc.

Question: 18

What is asthma?

Answer: 18

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It is chronic inflammation of bronchi which results in swelling and narrowing of air passageways.

Question: 19

Differentiate between biceps and triceps

Answer: 19

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Biceps : Biceps is a flexor muscle on the front of the upper arm bone it originate from 2 tendons

Question: 20

What are two phases of breathing.

Answer: 20

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1. Inspiration ii. Expiration

Question: 21

What are causes of asthma?

Answer: 21

21-133

Allergens, Irritants

Question: 22

Name the 2 disorders of skeletal system

Answer: 22

22-133

1: Osteoporosis

2: Arthritis

Question: 23

Different between bronchi and bronchioles.

Answer: 23

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Trachea divided into two branches which are called bronthi. Each bronchus further divided in to fine tubes called bronchioles.

Question: 24

Why do organisms need energy?

Answer: 24

24-133

The organisms need energy in the form of ATP for their activities and processes.

Question: 25

What are symptoms of Asthma?

Answer: 25

25-133

Shortness of breath, Wheezing, Chronic cough, Tightness of chest.

Question: 26

What is osteoporosis ?

Answer: 26

26-133

It is a bone disease in old men and women . There is decreased in density of bones due to loss of calcium and phosphorous

Question: 27

What structure are responsible for gaseous exchange in leaves and young stems?

Answer: 27

27-133

Stomata and lenticels.

Question: 28

What is bronchitis?

Answer: 28

28-133

It is the inflammation of the bronchi & bronchioles. It result i more secretions of mucous into these tubes. It leads to selling of tubes.

Question: 29

Does smoking effect only lungs?

Answer: 29

29-133

No, smoking may also effect other organs of body e.g. kidneys, oral cavity, larynx, breast, bladder, pancrea etc.

Question: 30

How many vertebrae are present in vertebral column ?

Answer: 30

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33 vertebrae

Question: 31

What are preventive measures of lungs cancer?

Answer: 31

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i. Elimination of tobacco smoking ii.Cessation of smoking.

Question: 32

Define reproduction .

Answer: 32

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Reproduction is defined as the production of individuals of the same species i-e the next generation of species . It is of two types

1: Sexual reproduction

2: A sexual reproduction

Question: 33

What is treatment of Asthma?

Answer: 33

33-133

Bronchodilators ii. Antibiotics

Question: 34

What is W.H.O.

Answer: 34

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W.H.O means world Health Organization.

Question: 35

What is osteoarthritis?

Answer: 35

35-133

It is the types of arthritis due to degeneration in the cartilage present at joints or due to decreased lubricants production at joints . In this arthritis , fusion of bones at joint may occur and joints become totally immoveable

Question: 36

What is the effect of carbon monoxide present in tobacco smoke?

Answer: 36

36-133

CO in tobacco smoke decreases th O2 carrying capacity of hemoglobin.

Question: 37

What are bulbs ? Give example .

Answer: 37

37-133

Bubs are short underground stems surrounded by thick , fleshy leaves that contain stored food . Roots merge under the base of bulb while shoots emerge from top of the base . Tulips, onion and lilies reproduce by bulbs

Question: 38

What is passive smoking? What is its effect?

Answer: 38

38-133

Inhalation of smoke from another's smoking is known as passive smoking. It may cause lungs cancer.

Question: 39

What is rheumatoid arthritis ?

Answer: 39

39-133

It involves the inflammation of the membranes at joints . It symptoms are fatigue , low grade fever , pain and stiffness in joints

Question: 40

How many carcinogens are found in cigarette smoke?

Answer: 40

40-133

over 50

Question: 41

What is the effect of smoking on teeth?

Answer: 41

41-133

Smoking causes weakening and staining of teeth.The loss of teeth is 2-3 times higher in smokes than in non-smokers.

Question: 42

What are the causes of osteoporosis ?

Answer: 42

42-133

1: Malnutrition
(lack of proteins and vitamins C )

2: Lack of physical activities

3: Deficiency of estrogen hormone

Question: 43

What is lungs cancer.

Answer: 43

43-133

It is disease of uncontrolled cell divisions in tissue of lungs.

Question: 44

What are causes of lungs cancer?

Answer: 44

44-133

Carcinogens present in tobacco smoke ii. Ionizing radiations iii. Viral infection

Question: 45

Name the chest bone .

Answer: 45

45-133

Sternum

Question: 46

What are allergens?

Answer: 46

46-133

Allergens are the chemical or substances that can irritate the respiratory tract are called allergens. For example pollens, fragrant particles, dust particle etc.

Question: 47

What is cranium ?

Answer: 47

47-133

It is the part of the skull which enclose brain . It consists of 22 bones

Question: 48

What is treatment of lungs cancer?

Answer: 48

48-133

Chemotherapy ii. Radiotherapy

Question: 49

Define alternation of generations.

Answer: 49

49-133

The life cycle of major plants show an alternation between two phases (generations) i-e sporophytes and gametophyte generations. The phenomenon in which two different generations alternate with each other during life cycle is known as alternation of generations.

Question: 50

What are treatments of arthritis?

Answer: 50

50-133

1: Pain killer

2: Anti-inflammatory medicines

Question: 51

Howe many pairs of ribs are present in human being ?

Answer: 51

51-133

12 pairs

Question: 52

What are the types of arthritis ?

Answer: 52

52-133

1: Osteoarthritis

2: Rheumatoid arthritis

3: Gout

Question: 53

How many bones are present in axial skeleton ?

Answer: 53

53-133

80 bones

Question: 54

What is meant by arthritis ?

Answer: 54

54-133

Arthritis means inflammation in joints

Question: 55

Give example of animals in which binary fission occur ?

Answer: 55

55-133

This type of asexual reproduction is common in planaria and many echinoderm

Question: 56

What are the major symptoms of arthritis ?

Answer: 56

56-133

Pin , stiffness , Swelling of joints

Question: 57

What are endospores ?

Answer: 57

57-133

Spores formation also occur in bacteria such as clostridium and bacillus species . These bacterial spores are called endospores . They are thick walled and are formed under unfavorable conditions

Question: 58

How many bones are present in appendicular skeleton ?

Answer: 58

58-133

126 bones

Question: 59

What is the significance of reproduction ?

Answer: 59

59-133

Reproduction is thus essentials for the continuation of species . It ensures that the genetic material of one generation is transmitted to next

Question: 60

Name the longest bone in our body

Answer: 60

60-133

Thigh bone (femur)

Question: 61

Give examples of insect pollinated and wind pollinated flowers?

Answer: 61

61-133

^{(i) Examples of insect pollinated flowers are buttercups, roses, wallflowers, sunflower, orchids etc.}

^{(ii) Examples of wind pollinated flowers are grasses, hazel, willow, corn etc}

Question: 62

Where is present hyoid bone ?

Answer: 62

62-133

It is present in neck

Question: 63

What is parthenogenesis ? Give example .

Answer: 63

63-133

Parthenogenesis is also considered as a asexual reproduction . In it , and unfertilized egg develops into new offspring ,some fishes ,frogs and insects reproduce by means of parthenogenesis

Question: 64

How does budding occur in corals ?

Answer: 64

64-133

In corals , the bud do not detach from their parent body . By remaining attached to the main body these form big colonies

Question: 65

Define asexual reproduction ,name its types .

Answer: 65

65-133

Asexual reproduction does not involve the fusion of gametes

1: Binary fission

2: Fragmentation

3: Budding

4: Parthenogenesis

5: Vegetative propagation

6: Spore formation

Question: 66

What is multiple fission ?

Answer: 66

66-133

Some unicellular (e.g amoeba ) form hard walls called cysts around them under unfavorable condition . When favorable conditions return . the nucleus of parent divides into many daughter nuclei of cytoplasm into several parts . Each new part of cytoplasm encloses one nucleus . So an number of daughter cells are formed from a single parent at the same time this kind of fission is known as multiple fission

Question: 67

What are sucker ? Give example

Answer: 67

67-133

Suckers are lateral stems close to ground level . A sucker grows underground for some distance and then turns up producing the new plant . Mint and chrysanthemum reproduce in this way

Question: 68

What is budding ? How does it occur in yeast

Answer: 68

68-133

In this type of asexual reproduction , a bud develops as a small outgrowth on parent body . In case of yeast ( a unicellular fungus ) a small bud is formed on one side of cell . The nucleus of cells divided and one of the daughter nuclei is passed into the bud of the parent cell mat form more than one bud at a time . Each bud enlarge and develops the characteristics of parent organism . The bud may separated from parent body

Question: 69

Briefly describe the technique of tissue culture?

Answer: 69

69-133

Tissues are taken from any part of plants and are put in a suitable nutrient medium . The tissues cells starts mitosis and produce masses of cells called calluses Calluses are transferred to other medium that contain different hormones for the formation of roots ,stem ,and leaves . These structure grows into small new plants are them planted in pots and then in fields.

Question: 70

How does binary fission occur in bacteria ?

Answer: 70

70-133

In bacteria , the DNA duplicates and forms two copies . Cell wall and membrane invaginates in centre and separates the cell into two . New cell wall is wall is deposited two cross membranes , which results in the formation of two daughter cell

Question: 71

What are corns ? Give example .

Answer: 71

71-133

Corns are short and swollen underground stems contain stored food . Buds are present at the top of the corn . From a bud shoot grows and form a new plant . Dasheen and garlic reproduce by corns

Question: 72

What is lacuna ?

Answer: 72

72-133

It is a fluid filled space in matrix of cartilage in which chondrocyte is present

Question: 73

Differentiate between spermatogenesis and oogenesis ?

Answer: 73

73-133

The production of sperms in tests is calledspermatogenesisand the production of eggs in ovaries calledoogenesis

Question: 74

What is sporangium ?

Answer: 74

74-133

It is generally seen in most fungi (e.g Rhizopus ) one of the cells enlarges and forms sporangium (spores sac ) in which spores are produced by meiosis

Question: 75

Write a sequence of underground stems for vegetative propagation in onion, ginger, potato and garlic?

Answer: 75

75-133

Bulb ,rhizome, stem tuber and corn

Question: 76

What is the advantages of vegetative propagation.

Answer: 76

76-133

The off springs produced through vegetative propagation are genetically identical. There- fore beneficial characteristics can be preserved.

Question: 77

What are rhizomes. Give example .

Answer: 77

77-133

Rhizomes are horizontal underground stems with scale leaves (rhizome ). These are enlarged portions called nodes on rhizomes . Buds are produced at nodes . The buds present on the upper surface of rhizome reproduce by rhizomes

Question: 78

How does bryophyllum reproduce vegetatively ?

Answer: 78

78-133

Vegetative propagation by leaves is not common and seen in plants such as bryophyllum (pather chut) . This plant has fleshy leaves adventitious buds when leaf falls on ground , the buds grows into new plants

Question: 79

What is corolla? What is its role ?

Answer: 79

79-133

Corolla is the inner to calyx. It is often colored brightly. Its individual units are called petal. The. serve to attract bees, birds, etc which are the agents of pollination.

Question: 80

Explain briefly the method of grafting?

Answer: 80

80-133

In grafting, a piece of stem is cut from the plant and is inserted into another plant with established root system. After a while, after the vascular bundles of the stem and the host plants have been connected to each other, the stem and the plant begin to grow together. This method is used to propagate many rose, peach tree, plum trees etc.

Question: 81

Define pollination. Name its types?

Answer: 81

81-133

Pollination is defined as the transfer of pollen grains from anther to stigma. Two types of pollination are recognized.(i) Self pollination(ii) Cross pollination

Question: 82

What are stem tubers ? Give example .

Answer: 82

82-133

Stem tubers are the enlarged portions of an underground stem (rhizome) These are aggregations of tiny buds in the form of eyes along the surface of the tuber . Each bud develops into shoot that grows upward and also produces roots . Potatoes and yarms reproduce by tubers

Question: 83

Define sporophyte generation?

Answer: 83

83-133

In most plant the sporophytes generation is dominant . It is diploid (2N) and produces haploid (1N) spores by meiosis

Question: 84

Define vegetative propagation ? What are its types ?

Answer: 84

84-133

When vegetative parts of plants i-e roots, stem ,or leaves give rise to new plants , the process is called vegetative reproduction or vegetative propagation . It occurs naturally , and can also be brought about artificially

Question: 85

Who discovered chromosomes ?

Answer: 85

85-133

Chromosomes was discovered by Waldeyar in 1876

Question: 86

What is the disadvantage of vegetative propagation?

Answer: 86

86-133

The plants do not have genetic variations. Specific diseases can attack and this can result in the destruction of an entire crop.

Question: 87

Define self pollination?

Answer: 87

87-133

Self pollination is defined as the transfer of pollen grain front the anther to stigma of the some iii flower or other flower of the same plant.

Question: 88

Define double fertilization

Answer: 88

88-133

One sperm fusses with egg. This results in the formation of a diploid zygote. The other sperm fuse with diploid fusion nucleus present inside the female gametophyte. It results ,1 the formation of , triploid nucleus called endosperm nucleus. Since the process of fertilization involve two fusions. it i: called double fertilization.

Question: 89

Q.31. What is flower? What are its whorls?

Answer: 89

89-133

Flower is the reproductive structure in sporophyte generations the outermost two whorls in a flowers are the non-reproductive whirls while the inner two whorls are the reproductive whorls

Question: 90

What is androceium?

Answer: 90

90-133

Third whorl of flower is androceium which is the male reproduction part of flower. Its units are called stamens

Question: 91

Differentiate between epicotyls and hypocotyls?

Answer: 91

91-133

The embryonic stem above the point of attachment of cotyledon (s) is called epicotyls .The embryonic stem below the point of attachmentis called hypocotyls

Question: 92

What is gyenoecium?

Answer: 92

92-133

Fourth whorl of flower is gyenoecium which is the female reproductive part of flower. Its units are called carpals (or pistils)

Question: 93

What arc the conditions for seed germination.

Answer: 93

93-133

Conditions for seed germination. Seed germination depends on both internal and external conditions. The internal conditions include a live embryo and sufficient food storage . The most important external conditions include water , oxygen and favorable temperature

Question: 94

What is calyx? What is the function?

Answer: 94

94-133

Calyx is the outer most whorl and usually green in color. Its individual units are called sepals.. It protects the inner whorl at bud stage .

Question: 95

What are different parts of angiosperm seeds?

Answer: 95

95-133

Angiosperm seeds consist of 3 distinct parts.

1: The embryo formed from zygote.

2: The endosperms tissue formed from endosperm nucleus, and

3: The seed coat which develops from the wall of ovule (integument)

Question: 96

What is sexual reproduction?

Answer: 96

96-133

Sexual reproduction involves the production and fusion of gametes. Special structures produce sperms and egg cells and there are various method in plants for bringing the sperm and egg nuclei together.

Question: 97

What is the composition of ribonucleotide ?

Answer: 97

97-133

1: Phosphate group

2: Ribose sugar

3: Nitrogenous base

Question: 98

From what part seed and fruit develop?

Answer: 98

98-133

Ovule becomes seed and ovary changes into fruit. after the act of double fertilization.

Question: 99

What is optimum temperature for germination of seeds ?

Answer: 99

99-133

The optimum temperature for the germination of the seeds of most plants ranges from 25-30°C

Question: 100

What is epigeal germination?Give examples

Answer: 100

100-133

In epigeal germination, the hypocotyls elongates and forms hook, pulling the cotyledons above ground. Beans, cotton and papaya are examples of plants that germinate this way.

Question: 101

What is seed dormancy?

Answer: 101

101-133

Most seeds go through a period, during which there is no growth. This period is called the dormancy of the seed. Dormant seeds are ripe seed but do not germinate. Under favorable condition, the seed break dormancy and begin to germinate.

Question: 102

What are hilum and micropyele?

Answer: 102

102-133

A scar on seed coat is called hilum. It is where the seed is attached to ovary wall (fruit). At one end of hilum. there is micropyle. This is the same opening through which the pollen tube entered ovule and seed uses it for the absorption of water.

Question: 103

What is the role of seminal vesicles , prostate , and Cowper's glands ?

Answer: 103

103-133

Seminal vesicles produce secretions that provide nutrients for sperms . Prostate gland produces a secretion that neutralizes the acidity . Cowper's gland produce secretions that lubricate that ducts

Question: 104

What is seed germination?

Answer: 104

104-133

Seed germination is a process by which a seed embryo develops into or seedling. During . germination. embryo soaks up with water which causes it to swell, splitting the seed coat. Root is the first structure that emerges from the radical present in seed. It grows rapidly and absorbs water and nutrients from soil. In the next phase, plumule develops into tiny shoot which elongates and comes out of soil.

Question: 105

What are sexually transmitted disease ? Give example

Answer: 105

105-133

Sexually transmitted (STDS) are defined as diseases that are transmitted through sexual act e.g AIDS

Question: 106

What is function of radical and plumule?

Answer: 106

106-133

the radical of embryo develops into new root while the plumule develops into new shoot.

Question: 107

Define pollination . How its brought about

Answer: 107

107-133

Cross pollination is the transfer of pollen grain from the flower on one plant to the flower on the plant of same species. Cross pollination is brought about by various agencies like, wind, water, bees birds. bats and other animals including man.

Question: 108

How many NGOs are working in Pakistan ? What are their objectives

Answer: 108

108-133

According to the latest data by the world bank , at least 54 NGOs are working in Pakistan for HIV AIDS public awareness and for the cure and support of person living with HIV/AIDS

Question: 109

Define fertilization . What are its types ?

Answer: 109

109-133

Fertilization is the process of union of male and female gametes to form zygote

Question: 110

What is hypogeal germination? Give examples.

Answer: 110

110-133

In hypogeal germination, the epicotyls elongates and forms the hook. In this type of germination, the cotyledons stay underground. Pea, maize and coconut germinate this way.

Question: 111

What are the parts of female reproductive system of rabbits ?

Answer: 111

111-133

The female reproductive system of rabbit consists of ovaries and associated ducts

Question: 112

What problems are associated with human over population ?

Answer: 112

112-133

Many problems are associated with human over population

Question: 113

What is genome ?

Answer: 113

113-133

The total amount of genetic material in a chromosomes set of an individual is called its genome

Question: 114

What are parts of male reproduction system of rabbit ?

Answer: 114

114-133

The male reproductive system of rabbits consists of a pair of testes that produce sperms , the associated ducts that transport sperms to external genitalia and glands that add secretions to sperms

Question: 115

What are the effect of summer on male-rabbits ?

Answer: 115

115-133

Male rabbits are sterile during the heat of summer months

Question: 116

What is genotype ?

Answer: 116

116-133

It is the form of appearance of an individual is called genotype

Question: 117

What is semen ?

Answer: 117

117-133

Semen is the material containing sperms in a fluid . It consists of 10 % sperms and 90% fluids . As the sperms pass down the ducts from testes to urethra , the associated glands add various secretions

Question: 118

Define gametogenesis .

Answer: 118

118-133

The formation of gametes is called gametogenesis . In this process , diploid (2N) gamete-mother cells undergo meiosis and differentiate to form mature haploid (1N) gametes

Question: 119

What is the unit of DNA?

Answer: 119

119-133

Deoxyribonucleotide

Question: 120

What is homologous pair of chromosomes ?

Answer: 120

120-133

The chromosomes , which are similar in their shape , size and position of centromere , make one homologous pair

Question: 121

What is the percentage of HIV infected people in Pakistan ?

Answer: 121

121-133

According to UNAIDS estimates , some 70,000 to 80,000 persons , or 0.1 percent of the adults population in Pakistan , are infected with HIV

Question: 122

What is linkage ?

Answer: 122

122-133

The phenomenon of staying together of all the genes of a chromosomes is called linkage

Question: 123

Define crossing over .

Answer: 123

123-133

An exchange of segments between non-sister chromatids of homologous chromosomes occurs at the chiasmata . This process is called crossing over

Question: 124

What is trachea?

Answer: 124

124-133

The trachea is 12 cm long tube.It lies in front of the esophagus.It is also called as windpipe.These are C-shaped cartilaginous nings in the wall of trachea .The cartilages keep the trachea from collapsing even when there is no air in it.

Question: 125

What is locus ?

Answer: 125

125-133

The position of a gene on the chromosomes is called locus

Question: 126

Define karyotype .

Answer: 126

126-133

The entire chromosomes complement of an individual or cell is called karyotype

Question: 127

Define alleles ?

Answer: 127

127-133

Patterns of gene pair is called alleles

Question: 128

State the law of segregation ?

Answer: 128

128-133

The two coexisting alleles of an individual for each trait segregate during gamete formation so that each gamete gets only one of the two alleles . This is called Mendel's law of segregation

Question: 129

Define multiple alleles.

Answer: 129

129-133

More than two alleles of a particular gene are called multiple alleles

Question: 130

What lanticals. Describe their function?

Answer: 130

130-133

In woody stems and mature roots the entire surface is covered by bark which is impervious to gases or water.However there are certain pones in the layer of bark.These are called the lenticels. The lenticels allow air to pass through them.

Question: 131

Define genetics .

Answer: 131

131-133

The study of inheritance and genetic material is called genetics

Question: 132

Define Nasal Cavity?

Answer: 132

132-133

Nasal cavity is the hallow space in the nose open to the outside through nostrils and divided into two portions by a wall.

Question: 133

What is the composition of deoxyribonucleotide ?

Answer: 133

133-133

It is composed of