Biology-Objective Related Question Answers
226. Meiosis occurs in which cells?
Reproductive cell
227. In which cell division chromosome number is reduced to half?
Meiosis
228. The branch of botany which deals with the life processes in plants is known as?
plant physiology
229. Father of Plant physiology?
Stephen Hales
230. Father of Indian Plant Physiology?
Sir J.C. Bose
231. The movement of particles or molecules of a substance from the region of higher concentration to a region of lower concentration is called ........?
Diffusion
232. The total water content present in the soil is known as?
holard
233. The water available to the plant from the soil is known as .....?
Chesard
234. In a plant cell DNA is present in?
Chromosomes; Mitochondria; Chloroplast
235. The non - available water in the soil is called?
echard
236. Upward conduction of water occurs through which type of plant cells?
xylem elements
237. The loss of water in the form of vapour from aerial parts of the stem is called ............?
transpiration
238. Transpiration occurs through which plant part?
stomata
239. Any substance applied to plants for the purpose of retarding transpiration is known as?
antitranspirant
240. A natural antitranspirant in plants?
CO2
241. The process of nitrogen fixation in organisms is controlled by which gene?
Nifgenes
242. Non - symbiotic N2 - fixation is carried out by bacteria such as .......... and ..........?
Azotobacter & Clostridium
243. Symbiotic N2 - fixation is carried out by which bacteria?
Rhizobium leguminosarum
244. Name two non - symbiotic N2- fixing blue - green algae (cyanobacteria)?
Nostoc; Anabaena
245. The term Nitrogen fixation denotes?
Conversion of nitrogen into ammonia
246. Hydroponics is a method of?
growth of plants in liquid culture medium
247. Maximum photosynthesis occurs in which light?
Red light
248. The loss of water from plants in the form of liquid is known as?
Guttation
249. Guttation occurs through specialised pores known as .....?
Hydathodes
250. The plants which are green in colour and capable of synthesizing their own food are known as?
Autotrophic plants
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