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_____________.
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.
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-
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.
