F. Skoog observed that from the internodal segments of tobacco stems the callus proliferated only if in addition to auxins the nutrient medium was supplied with the extracts of vascular tissues, yeast extract, coconut milk or DNA. Miller et al. later identified and crystallised the cytokinesis promoting active substance that they termed kinetin.
F. Skoog observed that callus proliferated from the internodal segments of tobacco stem when auxin was supplied with one of the following except :
NEET UG 2024 — Botany Plant - Growth and Development
2024mcqeasy
F. Skoog observed that callus proliferated from the internodal segments of tobacco stem when auxin was supplied with one of the following except :
Official previous-year question
Held on 30 Apr 2024 · Verified 9 Jul 2026.
Options
- A
Extract of Vascular tissues
- B
Coconut milk
- C
Abscisic acid
- D
Yeast Extract
Did you get this right?
Sign in to track your attempts and accuracy.
Your note
Sign in to keep a private note on this question. Nothing you write is ever public.
NEET UG Plant - Growth and Development in other years
Plant - Growth and Development 2025Plant - Growth and Development 2023Plant - Growth and Development 2022Plant - Growth and Development 2021Plant - Growth and Development 2020Plant - Growth and Development 2019Plant - Growth and Development 2017Plant - Growth and Development 2016Plant - Growth and Development 2015Plant - Growth and Development 2014Plant - Growth and Development 2013Plant - Growth and Development 2012
More NEET UG Plant - Growth and Development questions
Which one of the following phytohormones promotes nutrient mobilization which helps in the delay of leaf senescence in plants?
2025easy
Read the following statements on plant growth and development. (A) Parthenocarpy can be induced by auxins. (B) Plant growth regulators can be involved in promotion as well as inhibition of growth. (C) Dedifferentiation is a pre-requisite for re-differentiation. (D) Abscisic acid is a plant growth promoter. (E) Apical dominance promotes the growth of lateral buds. Choose the option with all correct statements.
2025medium
Auxin is used by gardeners to prepare weed-free lawns. But no damage is caused to grass as auxin
2024medium
Match List-I with List-II : \begin{array}{lll} & List-I & & List-II \\A.& Abscisic acid & I.& Promotes female flowers in cucumber \\B.& Ethylene & II.& Helps seeds to withstand desiccation \\C.& Gibberellin & III.& Helps in nutrient mobilisation \\D. & Cytokinin & IV.& Promotes bolting in beet, cabbage etc\end{array} Choose the correct answer from the options given below:
2024medium
Given below are some statements about plant growth regulators. A. All GAs are acidic in nature. B. Auxins are antagonists to GAs. C. Zeatin was isolated from coconut milk. D. Ethylene induces flowering in Mango. E. Abscisic acid induces parthenocarpy. Choose the correct set of statements from the options given below:
2024hard
Other Botany topics for NEET UG
Keep practicing Plant - Growth and Development
Work through every NEET UG Plant - Growth and Development PYQ, year by year.