Question

The Protista body compulsorily contains
1. A well-defined nucleus
II. Membrane bound cell organelles
III. Flagella or cilia
Correct statement is / are
(A) I and II
(B) I and III.
(C) II and III​

Answer 1

Answer:

Option A is right

Explanation:

PROTISTA:

• It is the second kingdom of five kingdom classification by R. H. Whittaker.

• This kingdom contains all unicellular eukaryotes.

• Eukaryotes are those organisms that have well defined nucleus and membrane bound cell organelles.

• Only prokaryotes do not have well defined nucleus . They also don't have membrane bound cell organelles.

• Since the protista are eukaryotes, it is necessary for them to have well defined nucleus and membrane bound cell organelles.

CILIA AND FLAGELLA:

• These are locomotory structures present in both prokaryotes and eukaryotes.

• So these structures do not become necessary component to differentiate prokaryotes and eukaryotes.

• The class of protista , namely chrysophytes consists of diatoms and desmides.

• Diatoms do not have flagella at any stage of their life.

• Remaining classes of protista have flagella or cilia in some stages of their life.

• So the presence of cilia or flagella is not compulsory of protists.

Answer 2

Answer:

The answer is a option A