Pollination
Pollination is a Science & Technology concept from the MPSC syllabus, tested in 5 past MPSC questions (2014, 2018, 2020). Below are those real questions with their correct answers and explanations, plus the concepts worth being comfortable with first.
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"सध्या जागतिक पातळीवर ताज्या आणि चांगल्या प्रतीच्या फुलांची मानवी आहारात वाढत्या प्रमाणात मागणी आहे." वरील विधान निम्न निर्देशित संभाव्य उपयुक्ततेवर आधारित असून त्यापैकी एक "वरील विधानाऱ्याच्या" संदर्भाने संयुक्तिक नाही. संयुक्तिक नसलेले कारण ओळखा. (1) फुलांमध्ये नैसर्गिकरीत्या एंटीऑक्सीडेंट व अपमार्जन (ज्यामध्ये क्रियाशील ऑक्सीजन अपमार्जन करण्याची क्षमता) कार्यक्षमता असते. (2) फुलांमध्ये "अंथोसायनीन" प्रचुर प्रमाणात असते. (3) फुल आकर्षक असून परागण प्रक्रियेत सहाय्य करतात. (4) फुलं महत्त्वाची जीवनसत्त्वे व खनिजांचा (मिनरल्स) स्रोत आहेत. "Currently there is increased demand for fresh and good quality flowers for human consumption worldwide". The above statement is based on the following potential values of flowers. Which one is not appropriate with the context of above statement. (1) Flowers are endowed with natural antioxidants and scavenging activity of reactive oxygen radicals. (2) Flowers are rich source of Anthocyanins. (3) Flowers are attractive and help in pollination mechanism. (4) Flowers are important source of vitamins and minerals.
While flowers are consumed for antioxidants, anthocyanins, and vitamins, the statement that 'flowers are attractive and help in pollination mechanism' describes their ecological and botanical function, not their nutritional value for human consumption.
लैंगिक पुनर्रूत्पादनामध्ये सहभागी होणाऱ्या फुलाच्या विविध अवयवांमध्ये खालीलपैकी काय दुर्लक्षित करता येणार नाही? As per the involvement of various parts of a flower in the process of sexual reproduction, which one of the following cannot be neglected?
(a)(1) निदल
(b)(2) दल
(c)(3) देठ
(d)(4) पुंकेसर
Stamens (पुंकेसर) are the male reproductive organs of a flower, which are absolutely essential and cannot be neglected in sexual reproduction.
परागीकरणानंतर फुलाचा कोणता अवयव परागकण अंकुरित करण्याचे कार्य करतो? After the transfer of pollen grains, which floral organ acts as a site for pollen tube germination?
(a)(1) कुक्षीवृंत
(b)(2) कुक्षी
(c)(3) बीजकोश
(d)(4) पुंकेसर
The stigma (कुक्षी) receives the pollen grains and acts as the vital site where pollen germination and pollen tube growth begin.
फुलंमधील आवश्यक मंडळ कोणते ? / Which of the following are essential whorls of the flowers ?
The essential whorls of a flower are the androecium (male reproductive organ) and gynoecium (female reproductive organ) as they take direct part in reproduction.
उक्रांती दरम्यान वनस्पतीची व परागीकरण करणाऱ्या घटकांची उक्रांती During the course of evolution, plants and their pollinators evolved
(a)(1) स्वतंत्रपणे झाली
(b)(2) एकमेकांसोबत झाली
(c)(3) प्रथम वनस्पतींची व नंतर परागीकरण करणाऱ्या घटकांची झाली
(d)(4) प्रथम परागीकरण करणाऱ्या घटकांची व नंतर वनस्पतींची झाली
Co-evolution occurs when two or more species reciprocally affect each other's evolution, meaning plants and their pollinators evolve simultaneously.