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A dithecous anther consists of ul((i)) m...

A dithecous anther consists of `ul((i))` microsporangia, `ul((ii))` in each lobe.

A

`{:((i),(ii).),(four,two):}`

B

`{:((i),(ii).),(two,"one"):}`

C

`{:((i),(ii).),(two,two):}`

D

`{:((i),(ii).),(four,"one"):}`

Text Solution

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The correct Answer is:
To answer the question regarding a dithecous anther, we need to break down the components of the anther and the microsporangia it contains. ### Step-by-Step Solution: 1. **Understanding the Structure of a Dithecous Anther**: - A dithecous anther is characterized by having two lobes. Each lobe contains microsporangia, which are the structures responsible for producing microspores (pollen grains). 2. **Identifying the Number of Microsporangia**: - In a typical dithecous anther, there are a total of **four microsporangia**. This is because each lobe of the anther contains two microsporangia. 3. **Microsporangia in Each Lobe**: - Since there are two lobes in a dithecous anther, and each lobe contains **two microsporangia**, we can conclude that: - **(i)** The total number of microsporangia in a dithecous anther is **4**. - **(ii)** The number of microsporangia in each lobe is **2**. ### Final Answer: - A dithecous anther consists of **4 microsporangia** in total, with **2 in each lobe**.

To answer the question regarding a dithecous anther, we need to break down the components of the anther and the microsporangia it contains. ### Step-by-Step Solution: 1. **Understanding the Structure of a Dithecous Anther**: - A dithecous anther is characterized by having two lobes. Each lobe contains microsporangia, which are the structures responsible for producing microspores (pollen grains). 2. **Identifying the Number of Microsporangia**: ...
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In a case of polyembryony if an embryo develops from the synergid and another from the nucellus, then the synergid embryo is ul((i)) and nucellar embryo is ul((ii)) .

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NCERT FINGERTIPS ENGLISH-SEXUAL REPRODUCTION IN FLOWERING PLANTS-Sexual Reproduction In Flowering Plants
  1. The stamens represent

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  2. Select the incorrect statement w.r.t pedigree analysis

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  3. A dithecous anther consists of ul((i)) microsporangia, ul((ii)) in eac...

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  4. Anther is generally

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  5. The given diagram shows microsporangium of a mature anther. Identify ...

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  6. The anther wall consists of four wall layers where

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  7. The function of labelled part X is

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  8. Which of the following statements regarding the structure of microspor...

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  9. Callase enzyme which dissolved callose of pollen tetrads to separate f...

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  10. Which function of tapetum is correct ?

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  11. In angiosperms various stages of reductional division can best be stud...

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  12. Study of pollen grains is called

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  13. Several pollen grains form a unit designated as pollinium in Family

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  14. The given figure represents

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  15. How many pollen mother cells should undergo meiotic division to produc...

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  16. How many meiotic divisions are required for the formation of 100 polle...

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  17. One of the most resistant biological material present in the exine of ...

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  18. Which of the following statements about sporopollenin is incorrect ?

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  19. What is the function of germ pore?

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  20. Read the given statements. (i) Outer exine is made up of sporopolle...

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