'Hartig net' is present in - - Solved MCQ | Agrigyan

Q.1

RPSC Agriculture Research Officer (Agriculture Chemistry) - 2022 (Q.150)

MCQ (Single Correct) +1 −0.33

'Hartig net' is present in -

'हार्टिग नेट' उपस्थित होती है -

Ectotrophic mycorrhizae एक्टोट्रोफिक माइकोराइज़ा Endomycorrhizae एंडोमाइकोराइज़ा BGA बी.जी.ए. Rhizobium राइज़ोबियम

'Hartig net' (named after Theodor Hartig) is a dense network of inward-growing fungal hyphae that extends between the epidermal and cortical cells of root tissues without penetrating inside the cell walls, which is the defining anatomical hallmark of ectotrophic mycorrhizae (ectomycorrhizae).
Endomycorrhizae (AM fungi) penetrate root cortical cells to form arbuscules and vesicles inside cells, lacking a Hartig net.
Blue-green algae (BGA) are photosynthetic cyanobacteria forming heterocysts for nitrogen fixation.
Rhizobium bacteria form symbiotic root nodules with legumes.

Hence, the correct option is (A).

'हार्टिग नेट' (Hartig net) कवक तंतुओं का एक विशिष्ट जाल होता है जो पादप जड़ों की बाह्यत्वचा और वल्कुट (Cortex) कोशिकाओं के बीच अंतःकोशिकीय स्थानों में फैलता है; यह एक्टोट्रोफिक माइकोराइज़ा (Ectomycorrhizae) की प्रमुख पहचान विशेषता है।
एंडोमाइकोराइज़ा (AM कवक) कोशिकाओं के भीतर प्रवेश कर आर्बस्क्यूल बनाते हैं।
बी.जी.ए. (नील हरित शैवाल) प्रकाश संश्लेषी सायनोबैक्टीरिया हैं।
राइज़ोबियम दलहनी फसलों में ग्रंथियां बनाता है।

अतः सही विकल्प (A) है।

Explanation not matching this question? क्या व्याख्या इस प्रश्न से मेल नहीं खा रही? Report

Q.2

RPSC Agriculture Research Officer (Agriculture Chemistry) - 2020 (Q.86)

MCQ (Single Correct) +1 −0.33

Which of the following shows endotrophic mycorrhiza ?

निम्न में कौन अन्तःस्तर पोषित माइकोराइजा प्रदर्शित करता है ?

Boletus बोलेटस Glomus ग्लोमस Amanita एमेनिटा Rhizoctonia राइजोक्टोनिया

Q.3

RPSC Agriculture Research Officer (Agriculture Chemistry) - 2020 (Q.87)

MCQ (Single Correct) +1 −0.33

The optimum temperature range for psychrophilic bacteria

साइक्रोफिलिक बैक्टीरिया के लिए उपयुक्त तापक्रम परास है -

Less than 5 °C 5 °C से कम Less than 20 °C 20 °C से कम Less than 35 °C 35 °C से कम Less than 45 °C 45 °C से कम

Q.4

RPSC Agriculture Research Officer (Agriculture Chemistry) - 2020 (Q.113)

MCQ (Single Correct) +1 −0.33

Which of the following is the phosphate solubilizer micro-organism ?

निम्न में से कौन सा सूक्ष्मजीव फॉस्फोरस घोलक (विलेयक) है?

VAM वी.ए.एम. Glomus ग्लोमस Gigaspora गिगास्पोरा Bacillus बैसिलस

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