The pyrenoids are made up of                                        [1995]

(a) Proteinaceous centre and starchy sheath

(b) Core of protein surrounded by fatty sheath

(c) Core of starch surrounded by sheath of protein

(d) Core of nucleic acid surrounded by protein sheath 

Concept Questions :-

To view Explanation, Please buy any of the course from below.
NEET 2021 - Achiever Batch - Aryan Raj Singh

Difficulty Level:


Consider the following features:

I. Chlorophyll a and Chlorophyll c

II. Fucoxanthin

III. Floridean starch

IV. Flagella 2 in number, unequal and lateral

Which of these are seen in Phaeophyceae?

(1) I, II, III

(2) I, II, IV

(3) II, III, IV

(4) I, II, III, IV

Concept Questions :-

Rhodophyceae: Red Algae and Importance of Algae
To view Explanation, Please buy any of the course from below.
NEET 2021 - Achiever Batch - Aryan Raj Singh

Difficulty Level:


The endosperm of a gymnosperm develops _______ fertilization, whereas the endosperm of an angiosperm develops _________ fertilization.

(1) before, before

(2) after, after

(3) after, before

(4) before, after

Concept Questions :-

Life Cycle Patterns in Plants
To view Explanation, Please buy any of the course from below.
NEET 2021 - Achiever Batch - Aryan Raj Singh

Difficulty Level:


In Pinus,

I. The stem is branched

II. Roots have fungal association in the form of mycorrhiza

III. The male and female strobili are borne on different trees

Of the above statements:

(1) Only I is correct

(2) Only II is correct

(3) Only I and II are correct

(4) I, II and III are correct

Concept Questions :-

Examples of Gymnosperms
To view Explanation, Please buy any of the course from below.
NEET 2021 - Achiever Batch - Aryan Raj Singh

Difficulty Level:


Identify the incorrect statement:

(1) The earliest systems of classification used only gross superficial morphological characters.

(2) Linnaeus classification of plants was a natural classification as it was based on the androecium structure.

(3) Artificial systems gave equal weightage to vegetative and sexual characteristics.

(4) Natural classification systems are based on natural affinities among the organisms

Concept Questions :-

Clssification System: I
To view Explanation, Please buy any of the course from below.
NEET 2021 - Achiever Batch - Aryan Raj Singh

Difficulty Level:


Identify the incorrecty statement:

(1) Numerical Taxonomy is based on all observable characteristics.

(2) More weightage is given to reproductive characters and all other characters are given equal importance in numerical taxonomy.

(3) Cytotaxonomy is based on cytological information like chromosome number, structure, behaviour

(4) Chemotaxonomy uses the chemical constituents of the plant

Concept Questions :-

Clssification System: I
Clssification System: II
To view Explanation, Please buy any of the course from below.
NEET 2021 - Achiever Batch - Aryan Raj Singh

Difficulty Level:


Match each term with its definition and choose your answer from the codes given:

I.

Isogamy

1.

The union of two gametes

II.

Syngamy

2.

Two gametes, one larger than the other

III. 

Heterogamy  

3.  

Two kinds of gametes, one motile and other non motile

IV.

Anisogamy

4.

Two kinds of morphologically distinct gametes

V.

Oogamy

5.

Both gametes morphologically indistinguishable

Codes:

 

I  

II

III

IV

V

(1)   

1     

2     

3     

4     

5

(2)

4

1

2

3

4

(3)

5

1

2

4

3

(4)  

3

1

2

4

5

 

Concept Questions :-

To view Explanation, Please buy any of the course from below.
NEET 2021 - Achiever Batch - Aryan Raj Singh

Difficulty Level:


Identify the incorrectly matched pair:

(1)  

Chlamydomanas:  

Microscopic unicellular algae

(2)

Volvox:

Colonial algae

(3)

Ulothrix:

Filamentous algae

(4)

Fucus:

Isogamous algae

Concept Questions :-

To view Explanation, Please buy any of the course from below.
NEET 2021 - Achiever Batch - Aryan Raj Singh

Difficulty Level:


Identify the incorrect statement regarding algae:

(1) At least a half of the total carbon dioxide fixation on earth is carried out by algae through photosynthesis.

(2) Around 70 species of freshwater algae can be used as food.

(3) Certain marine brown and red agae produce large amounts of hydrocolloids (water holding substances), e.g., algin (brown algae) and carrageen (red algae) which are used commercially.

(4) Agar, obtained from Gelidium and Gracilaria are used to grow microbes and in preparations of ice-creams and jellies.

Concept Questions :-

To view Explanation, Please buy any of the course from below.
NEET 2021 - Achiever Batch - Aryan Raj Singh

Difficulty Level:


What is not true for red algae?

(1) Lack centriole and flagella

(2) Accessory pigments include phycocyanin, phycoeythrin and allophycocyanin

(3) They reproduce using alternation of generation

(4) The stored food is floridean starch very similar to cellulose

Concept Questions :-

Rhodophyceae: Red Algae and Importance of Algae
To view Explanation, Please buy any of the course from below.
NEET 2021 - Achiever Batch - Aryan Raj Singh

Difficulty Level: