Charophytes are the only living algae that share distinctive derived traits with land plants that other algae don’t. All the following will be examples of such derived traits except:
1. Rings of cellulose-synthesizing proteins
2. Structure of flagellated sperms
3. Formation of a phragmoplast
4. Presence of chlorophyll a and b

Subtopic:  Chlorophyceae: Green Algae: I |
From NCERT

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.


Seed plants are source of some very important medicines for humans. Identify the pair where the drug in Column I is not correctly matched with its source seed plant in Column II:

 

COLUMN I

COLUMN II

1.

Digitalin

Foxglove

2.

Quinine

Cinchona

3.

Taxol

Belladonna plant

4.

Vinblastine

Periwinkle

Subtopic:  General Account of Angiosperms (OLD NCERT) |

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

In the given diagram of the green alga Chara, the parts labeled A and B respectively are called :

  

1. Nucule and Globule
2. Globule and Nucule
3. Antheridium and Archegonium
4. Archegonium and Antheridium

Subtopic:  Chlorophyceae: Green Algae: I |

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

advertisementadvertisement

In the life cycle of a moss, the sporphytic generation is represented by all the following except:

1. Oospore 2. Spore
3. Sporogonium 4. Spore mother cell
Subtopic:  Bryophytes |
From NCERT

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.


Identify the incorrectly matched row:

 

Character

Gymnosperm

Angiosperm

1.

Xylem

Tracheids only

Mainly vessels

2.

Pollination agency

Water only

Various

3.

Female gametophyte

Relatively large with distinct Archegonia

8-nucleate embryo sac

4.

Endosperm

Haploid

Triploid

Subtopic:  General Accounts of Gymnosperms: II | General Account of Angiosperms (OLD NCERT) |
 66%
From NCERT

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.


The structure in phanerogams that is homologous to the megasporangium of cryptogams is known as:
1. Embryo sac
2. Pollen sac
3. Nucellus of the ovule
4. Carpel

Subtopic:  Classification System |

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

advertisementadvertisement

Sphagnum can be distinguished from mosses by all the following characteristics except:
1. The stem has no rhizoids
2. Leaves have green and hyaline cells
3. The sex organs do not limit the indefinite growth of the main axis
4. The capsule is borne on seta

Subtopic:  Bryophytes |

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

Aplanogametes [gametes that do not have flagella] are the special features of:
1. Spirogyra and Zygnema
2. Spirogyra and Vaucheria
3. Ulothrix and Zygnema
4. Chlamydomanas and Ulothrix

Subtopic:  Algae |

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

Match each item in column I with one in Column II and select the correct answer from the codes given below:

Green alga

Feature

A. Chlamydomanas

a. Non motile colony

B. Volvox

b. Coenobium with two kinds of cells

C. Hydrodictyon

c. Palmella stage

D. Spirogyra

d. Spiral chloroplasts

Codes:

A B C D
1. a d b c
2. a b c d
3. c b a d
4. c d a b
Subtopic:  Chlorophyceae: Green Algae |

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

advertisementadvertisement

Consider the given two statements:
I. The term ‘archegonium’ is not used for megagametophytes, angiosperms and gnetophytes.
II. The sperms are delivered by means of a pollen tube in these plants.

1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. I is true but II is false
4. Both I and II are false

Subtopic:  General Account of Angiosperms (OLD NCERT) |
 62%

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints