Question

Read the following statements and choose the set of correct statements:
In the members of Phaeophyceae,
A. Asexual reproduction occurs usually by biflagellate zoospores.
B. Sexual reproduction is by oogamous method only.
C. Stored food is in the form of carbohydrates which is either mannitol or laminarin.
D. The major pigments found are chlorophyll a, c and carotenoids and xanthophyll.
E. Vegetative cells have a cellulosic wall, usually covered on the outside by gelatinous coating of algin.
Choose the correct answer from the options given below:

• A. A, B, C and D only
• B. B, C, D and E only
• C. A, C, D and E only
• D. A, B, C and E only

Answer 1

The Correct Option is C

To determine the correct set of statements about Phaeophyceae, let's analyze each statement:

• Asexual reproduction:
  A. Asexual reproduction occurs usually by biflagellate zoospores.
  This statement is correct as members of Phaeophyceae typically reproduce asexually via biflagellate zoospores.
• Sexual reproduction:
  B. Sexual reproduction is by oogamous method only.
  This statement is incorrect as sexual reproduction in Phaeophyceae can occur by isogamous, anisogamous, or oogamous methods, not solely by oogamous methods.
• Stored food:
  C. Stored food is in the form of carbohydrates which is either mannitol or laminarin.
  This statement is correct as mannitol and laminarin are the main forms of stored carbohydrates in Phaeophyceae.
• Pigments:
  D. The major pigments found are chlorophyll a, c, carotenoids, and xanthophyll.
  This statement is correct because these pigments are characteristic of Phaeophyceae.
• Cell structure:
  E. Vegetative cells have a cellulosic wall, usually covered on the outside by gelatinous coating of algin.
  This statement is correct as the cell wall in Phaeophyceae is typically composed of cellulose and algin.

Evaluating these statements leads us to conclude that the correct set of statements is: A, C, D, and E.

Option	Statements
A, B, C and D only	Incorrect
B, C, D and E only	Incorrect
A, C, D and E only	Correct
A, B, C and E only	Incorrect

Therefore, the correct answer is: A, C, D and E only.