511. In stems, the protoxylem lies towards the centre and the metaxylem lies towards the periphery of the organ. This type of primary xylem is called_____________.

1. Xylem fibres
2. Xylem parenchyma
3. Exarch
4. Endarch

Option “4” is correct
They primary xylem tissue in plants is categorized into protoxylem and metaxylem. In stems, the protoxylem lies towards the centre and the metaxylem lies towards the periphery of the organ. This type of primary xylem is called Endarch.
512. Lion, Leopard and Tiger are all species of which genus?

1. Solanum
2. Panthera
3. Felis
4. Tigris

Option “2” is correct
Panthera is a genus of chiefly large cats that includes the snow leopard, tiger, leopard, jaguar, and lion, most having the ability to roar.
513. Ringworm is a disease caused by-

1. Fungi
2. Bacteria
3. Virus
4. Flies

Option “1” is correct
Ringworm of the skin (tinea corporis) is most commonly caused by the fungus Trichophyton rubrum, which spreads from one person to another.
514. Mangifera indica is the scientific name of-

1. Guava
2. Mango
3. Amla
4. Jack fruit

Option “2” is correct
Mangifera Indica is commonly known as mango.
515. The study of the internal structure of the plants is called—

1. Taxonomy
2. Agronomy
3. Anatomy
4. Morphology

Option “3” is correct
Plant anatomy is the study of the internal structure of plants.
516. The insulin is a?

1. Hormone
2. Fatty acid
3. Glycolipid
4. Protein

Option “1” is correct
Insulin is a hormone made by the pancreas that allows your body to use sugar (glucose) from carbohydrates in the food that you eat for energy or to store glucose for future use.
517. The maximum loss of water in transpiration is from—

1. Cuticle
2. Stomata
3. Hydothodes
4. Lenticles

Option “2” is correct
The maximum loss of water in transpiration is from stomata.
518. Which one of the following processes is involved in plants?

1. Transpiration
2. Photosynthesis
3. Both (a) and (b)
4. None of the above

Option “3” is correct
Transpiration is the process of water movement through a plant and its evaporation from aerial parts, such as leaves, stems and flowers.
519. Rearing silk worms is known as-

1. Apiculture
2. Horticulture
3. Sericulture
4. Floriculture

Option “3” is correct
Apiculture – Rearing bees
Horticulture – Study of fruit and flower producing plants
Sericulture – Rearing silk worm.
Floriculture – Study of flowers for decoration work.
520. The branch of study dealing withhold age and ageing is called-

1. Oncology
2. Gerontology
3. Teratology
4. Ornithology

Option “2” is correct
Gerontology is the study of the social, psychological, cognitive and biological aspects of aging. Oncology is the branch of medical science that deals in treating people suffering from cancer. Teratology is the study of abnormalities of physiological development. Ornithology is a branch of zoology that is related to the study of birds.
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48 thoughts on “Biology”

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