The process by which water is lost from plants as liquid droplets through hydathodes is:
A. Transpiration
B. Guttation
C. Precipitation
D. Evaporation
Answer: Option B
Solution (By JKSSB Mock Tests)
Guttation occurs when root pressure forces water out through special pores (hydathodes) at leaf tips/margins, forming droplets, usually at night or early morning. Transpiration is vapor loss, evaporation from wet surfaces, precipitation is rain.
Explanation:
P700 is the reaction center chlorophyll a of photosystem I, absorbing light at 700 nm. It donates electrons to ferredoxin. P680 is the reaction center of PSII. Chlorophyll b and carotenoids are accessory pigments. The two photosystems work in series to transfer electrons from water to NADP⁺.
Explanation:
Cuscuta (dodder) is a parasitic plant that lacks chlorophyll and derives nutrients from the host plant through haustoria. It is a total stem parasite. Mango, neem, and sunflower are autotrophic plants performing photosynthesis. Heterotrophic plants include parasites (Cuscuta, Rafflesia) and saprophytes (Monotropa).
Explanation:
Meiosis consists of two successive divisions resulting in four genetically diverse haploid cells (gametes). Mitosis produces two identical diploid cells, amitosis is direct nuclear division, binary fission is prokaryotic asexual reproduction.
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