MHT CET · BIOLOGY · STD 12 - 1. Reproduction in Lower and Higher Plants
For the formation of 140 angiospermic seeds how many meiotic cell divisions are expected?
- A 175
- B 280
- C 560
- D 240
Answer & Solution
Correct Answer
(A) 175
Step-by-step Solution
Detailed explanation
For formation of 140 angiospermic seeds 140 male gametes and 140 female gametes are required.
For formation of 140 male gametes, the number of meiotic divisions required will be 35.
(1 Microspore mother cell \(\xrightarrow{\text { meiosis }}\) 4 microspores)
For formation of 140 female gametes, the number of meiotic divisions required will be 140.
(1 Megaspore mother cell \(\xrightarrow{\text { meiosis }}\) 4 megaspores \(\xrightarrow{3 \text { degenerate }} 1\) functional megaspore)
Therefore, for the formation of 140 angiospermic seeds 175 meiotic cell divisions are expected
For formation of 140 male gametes, the number of meiotic divisions required will be 35.
(1 Microspore mother cell \(\xrightarrow{\text { meiosis }}\) 4 microspores)
For formation of 140 female gametes, the number of meiotic divisions required will be 140.
(1 Megaspore mother cell \(\xrightarrow{\text { meiosis }}\) 4 megaspores \(\xrightarrow{3 \text { degenerate }} 1\) functional megaspore)
Therefore, for the formation of 140 angiospermic seeds 175 meiotic cell divisions are expected
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from BIOLOGY
- Given below are two statements with respect to single cell protein.
Statement I: Single cell protein refers to the crude, or refined edible protein, extracted from pure microbial cultures or from dead or dried cell biomass.
Statement II: SCP can be readily used as fodder for achieving fattening of calves, pigs, in breeding fish and in poultry.
In the light of the above statements, choose the correct answer from the options given below.MHT CET 2024 Easy - In a normal healthy person, if total number of WBCs is about \(9000 / mm ^3\), then the number of Agranulocytes is about __________ \(/ mm ^3\) of blood.MHT CET 2024 Hard
- If the number of chromosomes in an endosperm of seed is 21, what will be the chromosome number in the secondary nucleus?MHT CET 2019 Hard
- Match the diseases in Column I with the type of microbe causing them in Column II.
Choose the correct optionColumn I Column II i Elephantiasis a. virus ii Typhoid b. nematode parasite iii Dermatophytosis c. Gram -ve bacteria iv Dengue d. Protist v Malaria e. fungus MHT CET 2023 Hard - Acromegaly is caused by hypersecretion of ___________ in the adult.MHT CET 2016 Hard
- Association between clown fish and sea anemone is ________.MHT CET 2025 Medium
More PYQs from MHT CET
- In non-uniform circular motion, the ratio of tangential to radial acceleration is ( \(r\) is radius of circle, \(v\) is speed of the particle, \(\alpha\) is angular acceleration)MHT CET 2022 Easy
- A body of mass \(m\) is dropped from a height \(\frac{R}{2}\), from the surface of earth where \(R\) is radius of earth. Its speed when it will hit the earth's surface is \(\left(v_e=\right.\) escape \(v\) elocity from earth' surface)MHT CET 2022 Easy
- In a triangle ABC , with usual notations, \(\cot \left(\frac{A+B}{2}\right) \cdot \tan \left(\frac{A-B}{2}\right)=\)MHT CET 2025 Medium
- Cambium is essential for grafting in plants becauseMHT CET 2018 Hard
- A rotating body has angular momentum 'L'. If its frequency of rotation is halved and rotational kinetic energy is doubled, its angular momentum becomesMHT CET 2020 Medium
- The time taken by a particle executing simple harmonic motion of period \(T\) to move from the mean position to half the maximum displacement isMHT CET 2022 Medium