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 identify the accurate statements about Phaeophyceae, each statement requires analysis:

• Asexual reproduction:
  A. Asexual reproduction typically occurs via biflagellate zoospores.
  This statement is accurate; Phaeophyceae members commonly reproduce asexually using biflagellate zoospores.
• Sexual reproduction:
  B. Sexual reproduction is exclusively oogamous.
  This statement is inaccurate; Phaeophyceae exhibit sexual reproduction through isogamous, anisogamous, or oogamous methods, not exclusively oogamous.
• Stored food:
  C. Stored food is in the form of carbohydrates, specifically mannitol or laminarin.
  This statement is accurate; mannitol and laminarin are the primary forms of stored carbohydrates in Phaeophyceae.
• Pigments:
  D. The primary pigments present are chlorophyll a, c, carotenoids, and xanthophyll.
  This statement is accurate, as these pigments are characteristic of Phaeophyceae.
• Cell structure:
  E. Vegetative cells possess a cellulosic wall, often externally enveloped by a gelatinous coating of algin.
  This statement is accurate; Phaeophyceae cell walls typically consist of cellulose and algin.

Based on this evaluation, the correct statements are 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

Consequently, the correct selection is: A, C, D and E only.