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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

AI Generated Solution

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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Number of microsporangia in a dithecous anther is:

Each testis is ul((A)) in the length and ul((B)) in width.

Knowledge Check

  • Population ecology is an important area because it ul((i)) ecology to population genetics and ul((ii)) . Identify (i) and (ii) in the above statement and select the correct option.

    A
    `{:((i),(ii).),("distinguished","evolution"):}`
    B
    `{:((i),(ii).),("distinguished","biogenesis"):}`
    C
    `{:((i),(ii).),("links","evolution"):}`
    D
    `{:((i),(ii).),("links","biogenesis"):}`

  • Mark the appropriate choice to fill up the blanks in the given paragraph. A solution which maintains constant pH when small amounts of acid or base are added is known as a ul((i)) . A mixture of acetic acid and sodium acetate acts as ul((ii)) with a pH around ul((iii)) and a mixture of ammonium chloride and ammonium hydroxide acts as ul((iv)) with a pH around ul((v))

    A
    `{:((i),(ii),(iii),(iv),(v),),("buffer capacity","basic buffer",9.25,"acidic buffer",4.75,):}`
    B
    `{:((i),(ii),(iii),(iv),(v),),("buffer solution","acidic buffer",9.25,"basic buffer",4.75,):}`
    C
    `{:((i),(ii),(iii),(iv),(v),),("buffer solution","basic buffer",4.75,"acidic buffer",9.25,):}`
    D
    `{:((i),(ii),(iii),(iv),(v),),("buffer solution","acidic buffer",4.75,"basic buffer",9.25,):}`

  • Select the option that correctly fills the blanks in the following statements. A. Glucose has ul((i)) carbon atoms, pyruvic acid has ul((ii)) carbon atoms and the acetyl group has ul((iii)) carbon atoms. B. Electrons enter the electron transport system as parts of hydrogen atoms attached to ul((i)) and ul((ii)) .

    A
    `{:(" "A," "B),((i)-6(ii)-4(iii)-3,(i)-NADH(ii)-FADH_(2)):}`
    B
    `{:(" "A," "B),((i)-6(ii)-3(iii)-2,(i)-NADH(ii)-FADH_(2)):}`
    C
    `{:(" "A," "B),((i)-6(ii)-3(iii)-2,(i)-ATP (ii)-GTP):}`
    D
    `{:(" "A," "B),((i)-6(ii)-4(iii)-3,(i)-ATP(ii)-GTP):}`

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    Read the following statements A to D :- A. A typical anther of angiosperm is dithecous. B. Egg apparatus consists of two antipodals and one egg cell. C. Cleistogamous flowers are invariably autogamous. D. If a female parent produces unisexual flowers, there is no need for emasculation. How many of the above statements are right?

    Given below are the three statements each with one or two blanks. Select the option which correctly fills up of the blank in any two statements. A. Inbreeding helps in accumulation of ul(i) and elimination of ul(ii) . B. In MOET a cow is administered hormones, with ul(i) like activity, to induce follicular maturation and super ovulation. C. Hisardale is a new breed of sheep developed in Punjab by crossing ul(i) and ul(ii) .

    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)) .

    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)) .

    Though vertebrates are aerobes, but their ul((i)) show anaerobic respiration during ul((iii)) . During this ul((iii)) of skeletal muscle fibres is broken down to release lactic acid and energy. Lactic acid, if accumulates causes muscle fatigue. Fill up the blanks in the above paragraph and select the correct option.

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