Ecosystem And Biosphere

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61 The reproductive parts of a flower are

A
Calyx and carpels
B
Calyx and corolla
C
Corolla and stamens
D
Stamens and carpels

62 Water in plants is trans-ported by which of the following:

A
cambium
B
phloem
C
epidermis
D
xylem

63 Clove, the commonly used spice, is obtained from the

A
root
B
stem
C
flower bud
D
fruit

64 Which components of light are absorbed by chlorophyll ?

A
Violet and red
B
Indigo and orange
C
Blue and red
D
Violet and yellow

65 Eyes of potato are useful for

A
Nutrition
B
Respiration
C
Reproduction
D
Vegetative propagation

66 Which of the following is not required for seed germination?

A
Water
B
Air
C
Sunlight
D
Suitable

67 Which are the largest fixator of solar energy ?

A
Bacteria
B
Protozoa
C
Fungi
D
Green plants

68 The corner of the cells of collenchyma tissue in plant are thickened due to deposition of ……

A
Lignin and suberin
B
Suberin and cutin
C
Cellulose and pectin
D
Chitin and lignin

69 The branch of biology dealing with the study of cells is known as

A
Cytology
B
Histology
C
Psychology
D
Physiology

70 The age of a tree can be determined more or less accurately by which of the following:

A
counting the number of branches
B
measuring the height of the tree
C
measuring the diameter of the trunk
D
counting the number of rings in the trunk

71 Which of the following organisms is most likely to produce greenhouse gases such as nitrous oxide and methane?

A
Fungi
B
Earthworm
C
Bacteria
D
Green plants

72 The universal natural auxin of plants is :

A
IBA
B
Citric auxin
C
NAA
D
IAA

73 The chemical used for destroying Fungi in water tanks is :

A
Copper sulphate
B
Magnesium sulphate
C
Zinc sulphate
D
Nitric acid

74 The device to measure transpiration in plants is :

A
Hygrometer
B
Crescometer
C
Potometer
D
Clinometer

75 Plasma membrane in eukaryotic cells is made up of :

A
Phospholipid
B
Lipoprotein
C
Phospholipo-protein
D
Phospho-protein