Question

Match List I with List II :

List I                       List II
A. Productivity              I. Gross primary productivity minus respiration losses
B. Net primary productivity  II. Rate of formation of new organic matter by consumers
C. Gross primary productivity III. Rate of biomass production
D. Secondary productivity    IV. Rate of production of organic matter during photosynthesis

Choose the correct answer from the options given below :

• A. A-I, B-III, C-II, D-IV
• B. A-IV, B-II, C-I, D-III
• C. A-II, B-IV, C-I, D-III
• D. A-III, B-I, C-IV, D-II

Hint:

Use mnemonics! Marginal Pea (Map), Axile China Tomato Lemon (ACTL), Parietal Mustard Argemone (PMA), Basal Sunflower Marigold (BSM).

Answer 1

The Correct Option is C

Placentation refers to the arrangement of ovules within the ovary. The correct examples for each type are:
• Marginal (A): The placenta forms a ridge along the ventral suture of the ovary. Example: Pea (II).
• Axile (B): The placenta is axial and the ovules are attached to it in a multilocular ovary. Examples: Lemon (IV), Tomato, China rose.
• Parietal (C): The ovules develop on the inner wall of the ovary or on peripheral parts. Examples: Mustard (I), Argemone.
• Basal (D): The placenta develops at the base of the ovary and a single ovule is attached to it. Examples: Marigold (III), Sunflower. Matching these results in A-II, B-IV, C-I, D-III.