Unit 6 Chapter 12: Ecological Adaptations Succession and Ecological Services — Online MCQ Test
BOTANY · CLASS 11 INTERMEDIATE 1 YEAR · Telangana State Board
Practice Unit 6 Chapter 12: Ecological Adaptations Succession and Ecological Services with a free chapter-wise online MCQ test.
This chapter covers: The final chapter details plant adaptations in xerophytes hydrophytes mesophytes plant succession stages ecological pyramids food chains and ecosystem services..
AI-generated questions from basic to board-exam level, with instant results and explanations.
Unit 6 Chapter 12: Ecological Adaptations Succession and Ecological Services — Important Questions & Answers
Which plant adaptation is most suitable for a xerophyte?
- A. Thin cuticle and broad leaves
- B. Sunken stomata and thick cuticle
- C. Large air spaces in stem
- D. Floating leaves with stomata on upper surface
Answer: B. Sunken stomata and thick cuticle
Xerophytes live in dry habitats, so they reduce water loss by having a thick cuticle and sunken stomata. These adaptations help conserve water.
Xerophytes live in dry habitats, so they reduce water loss by having a thick cuticle and sunken stomata. These adaptations help conserve water.
In hydrophytes, which of the following is commonly found?
- A. Well-developed root system for absorption from dry soil
- B. Reduced vascular tissue and large air spaces
- C. Thick bark and sunken stomata
- D. Needle-like leaves and resin canals
Answer: B. Reduced vascular tissue and large air spaces
Hydrophytes are aquatic plants and often have reduced vascular tissue with large air spaces for buoyancy and gaseous exchange.
Hydrophytes are aquatic plants and often have reduced vascular tissue with large air spaces for buoyancy and gaseous exchange.
A plant with thick, fleshy stem and leaves modified into spines is most likely a:
- A. Mesophyte
- B. Hydrophyte
- C. Xerophyte
- D. Epiphyte
Answer: C. Xerophyte
Such features are typical of xerophytes, which reduce water loss and store water to survive dry conditions.
Such features are typical of xerophytes, which reduce water loss and store water to survive dry conditions.
A student observes a plant community changing from grasses to shrubs and finally to trees after a forest fire. This is an example of:
- A. Primary succession
- B. Secondary succession
- C. Hydrosere
- D. Xerophytic adaptation
Answer: B. Secondary succession
Secondary succession occurs in an area where soil already exists after disturbance like fire. The community rebuilds in stages from grasses to forest.
Secondary succession occurs in an area where soil already exists after disturbance like fire. The community rebuilds in stages from grasses to forest.
Which of the following is the most appropriate order of ecological succession in a bare rock habitat?
- A. Mosses → lichens → shrubs → trees
- B. Lichens → mosses → herbs → shrubs → trees
- C. Shrubs → herbs → lichens → trees → mosses
- D. Trees → shrubs → herbs → mosses → lichens
Answer: B. Lichens → mosses → herbs → shrubs → trees
In xerosere on bare rock, lichens are pioneers, followed by mosses, herbs, shrubs, and finally trees as the climax community. Soil formation gradually allows larger plants to establish.
In xerosere on bare rock, lichens are pioneers, followed by mosses, herbs, shrubs, and finally trees as the climax community. Soil formation gradually allows larger plants to establish.