Which pigment is responsible for the red, orange, and yellow coloration in leaves? (A) Aldehydes (B) Tannins (C) Lignins (D) Carotenoids Ans: (D) Carotenoids
In which part of the cabbage plant is food stored? (A) Leaves (B) Stem (C) Fruit (D) Scurvy Ans: (A) Leaves
What is the primary biological process through which plants reproduce? (A) Pollination (B) Condensation (C) Consumption (D) Evaporation Ans: (A) Pollination
Plants that grow optimally in bright sunlight are known as: (A) Sciophilous (B) Xerophytes (C) Heliophytes (D) Epiphytes Ans: (C) Heliophytes
Which plant hormone is mainly responsible for maintaining seed dormancy? (A) Abscisic Acid (B) Gibberellic Acid (C) Indole Acetic Acid (D) Ethylene Ans: (A) Abscisic Acid
A fruit that develops from a multicarpellary apocarpous gynoecium is called: (A) Composite (B) Aggregate (C) Simple (D) Multiple Ans: (B) Aggregate
What is the term for the winter dormancy period in animals? (A) Aestivation (B) Hibernation (C) Regeneration (D) Mutation Ans: (B) Hibernation
Which of the following acts as the substrate in photorespiration? (A) Fructose (B) Pyruvic Acid (C) Glycolate (D) Glucose Ans: (C) Glycolate
What is the first stable product formed during photosynthesis? (A) Starch (B) Sucrose (C) Phosphoglyceric Acid (PGA) (D) Glucose Ans: (C) Phosphoglyceric Acid (PGA)
In which plant are dumb-bell-shaped guard cells found? (A) Groundnut (B) Gram (C) Wheat (D) Mango Ans: (C) Wheat
How do plants release excess absorbed water? (A) Evaporation (B) Osmosis (C) Diffusion (D) Transpiration Ans: (D) Transpiration
What physical force primarily enables roots to absorb water? (A) Elasticity (B) Capillarity (C) Viscosity (D) Photosynthesis Ans: (B) Capillarity
Which plant part is mainly responsible for transpiration? (A) Stem (B) Leaves (C) Roots (D) All aerial parts Ans: (B) Leaves
The corners of collenchyma cells thicken due to deposition of: (A) Lignin and Suberin (B) Suberin and Cutin (C) Cellulose and Pectin (D) Chitin and Lignin Ans: (C) Cellulose and Pectin
The sudden folding of leaves in the “Touch-me-not” plant is an example of: (A) Photonasty (B) Nyctinasty (C) Seismonasty (D) Chemonasty Ans: (C) Seismonasty
Kidney-shaped guard cells are typically seen in: (A) Dicot Plants (B) Monocot Plants (C) Both A and B (D) Algae Ans: (A) Dicot Plants
In cacti, the spines are modified forms of: (A) Stems (B) Stipules (C) Leaves (D) Buds Ans: (C) Leaves
What causes the stomata to open? (A) Exosmosis (B) Endosmosis (C) Plasmolysis (D) Low Cell Sap Concentration Ans: (B) Endosmosis
2,4-D is widely used as a: (A) Weedicide (B) Vitamin (C) Fertilizer (D) Insecticide Ans: (A) Weedicide
The liquid inside a coconut is actually: (A) Liquid Nucellus (B) Liquid Mesocarp (C) Liquid Endocarp (D) Degenerated Liquid Endosperm Ans: (D) Degenerated Liquid Endosperm
