41) What is “ALZHEIMER’S” disease ?
a)It affects liver
b) It affects Kidney
c) It affects human immune system
d) It is a disorder of the brain
42) Plants wilt due to excess of
a) transpiration
b) photosynthesis
c) absorption
d) None of these
43) Plants hormone that induces cell division is
a) auxins
b) gibberellins
c) kinins
d) domins
44) Plants receive their nutrients mainly from
a) chlorophyll
b) atmosphere
c) light
d) soil
45) Which among the following kinds of lenses are used to treat Astigmatism ?
a)Concave Lens
b)Convex Lens
c)Bifocal Lens
d)Cylindrical
46) Which of has following group of gases contribute to the ‘Green House Effect’ ?
a)Carbon tetrafluoride and Nitrous oxide
b)Carbon monoxide and Sulphur dioxide
c)Ammonia and Ozone
d)Carbon dioxide and Methane
47) How do marine animals survive in water without air contact ?
a)They do not require any oxygen
b) They take oxygen from water
c) They only produce oxygen in their body
d) They get oxygen from water plants
48) Photo-oxidation is
a) photorespiration
b) photolysis
c) light and oxygen induced breakdown
d) All of the above
49) What provides instant energy ?
a)Fat
b)Carbohydrates
c)Protein
d)Vitamin
50) Potato is a modified form (outgrowth) of:
a) root
b) stem
c) fruit
d) leaf
51) Plants that grow under average temperature and moisture are called
a) halophytes
b) hydrophytes
c) mesophytes
d) xerophytes
]52) Other than spreading malaria, anopheles mosquitoes are also vectors of
a) dengue fever
b) filariasis
c) encephalitis
d) yellow fever
53) The branch of agriculture which deals with the feeding, shelter, health and breeding of the domestic animals is called ?
a) Animal Husbandry
b) Dairy Science
c) Veterinary Science
d) Poultry
54) Rubber is obtained from ?
a)cell sap
b)latex
c)gun
d)resin
55) Most abundant tissues of our body are
a) muscular
b) connective
c) epithelial
d) nervous
56) Phloem tissue is found in ?
a)Plants
b)Insects
c)Mammals
d)All of above
57) Process of cell division can take place by
a) heterosis
b) fusion
c) mitosis
d) None of these
58) Our skin, when exposed to excess sunlight, becomes dark. This is because our skin pigments called
a) flavoxanthin
b) melanin
c) carotene
d) Xanthophyll
59) Heart attack occurs due to ?
a)Bacteria
b) Stopping of heart beat
c) Lack of blood supply to the heart itself
d) Impairment of heart's working due to unknown reason
60) Pyorrhoea is a disease of the
a)nose
b)gums
c)heart
d)lungs