Free Forest Ecology MCQs with Answers

• A. Allomones
• B. Depresants
• C. Kairomones
• D. Allelochemics

Explanation: Allelochemics are chemical substances released by organisms that influence other organisms, including compounds that inhibit or destroy…

• A. Viscum
• B. Darlingtonia
• C. Both (a) & (b)
• D. Cephalotus

Explanation: Darlingtonia and Cephalotus are insectivorous plants that capture and digest prey, whereas Viscum is a parasitic mistletoe obtaining…

• A. Depresants
• B. Allomones
• C. Allelochemics
• D. Kairomones

Explanation: Chemicals produced by plants that influence neighbouring plants are broadly termed allelochemics, commonly discussed under allelopathy.

• A. Allolimy
• B. Allelopathy
• C. Synnecrosis
• D. Allotropy

Explanation: Allotropy is used here for a commensal-type relationship in which the weaker organism benefits while the stronger partner remains…

• A. Bacteria
• B. Tape worm
• C. Thesium
• D. Balanophora

Explanation: A hyperparasite lives on or attacks another parasite; bacteria can parasitize parasitic fungi or other parasites.

• A. Ecotone
• B. Ecotype
• C. Ecological equivalents
• D. None of these

Explanation: An ecotype is a genetically distinct population shaped by a particular environment and retaining its adaptations.

• A. Polar ice
• B. Greenland
• C. Glaciers and Mountains
• D. Antarctica

Explanation: About two-thirds, often rounded to more than 70% in older textbook sources, of the world's freshwater is locked in glaciers and permanent…

• A. Autecology
• B. Ethology
• C. Ecology
• D. Syncology

Explanation: Synecology, also written syncology in some texts, studies communities and their relationship with the environment.

• A. Man and biosphere programme
• B. Man and biology programme
• C. Mammals and biosphere programme
• D. Mammals and biology programme

Explanation: MAB is UNESCO's Man and the Biosphere Programme, an international programme concerned with human-environment relationships and biosphere…

• A. Desert
• B. Hills
• C. Plains
• D. Sea

Explanation: In basic ecological descriptions, juicy or succulent fruits are associated with desert plants because water is scarce and tissues often…

• A. Bulbs
• B. Corms
• C. Seeds
• D. Rhizomes

Explanation: Therophytes, probably intended by the misspelled “thermophytes,” are annual plants that pass an adverse season as dormant seeds.

• A. Xerophytes
• B. Halophytes
• C. Mesophytes
• D. Hydrophytes

Explanation: Hydrophytes have weakly developed roots because water is readily available, and their aerenchyma forms numerous air spaces for buoyancy…

• A. Hydrophytes
• B. Xerophytes
• C. Halophytes
• D. None of these

Explanation: Hydrophytes need little mechanical support because water provides buoyancy, and their vascular tissue and roots are poorly developed.

• A. Soil nutrients become very dilute
• B. Root respiration stops
• C. Nutrients leach down due to excessive water
• D. Cell sap in plant becomes too dilute

Explanation: Waterlogging fills soil pores and displaces oxygen, so roots cannot respire aerobically and eventually die.

• A. Water bank
• B. Water
• C. Hills
• D. Deserts

Explanation: Xerophytes are adapted to very dry habitats, especially deserts, through features such as reduced leaves, thick cuticles and water-storing…

• A. Deserts
• B. Lakes and ponds
• C. Mixed temperate forests
• D. Mixed tropical forests

Explanation: Desert plants commonly develop root systems much larger than their shoots to obtain scarce and widely dispersed water.

• A. Fresh water lakes
• B. Geographically limited areas
• C. Tissue of other plants
• D. Shady places

Explanation: An endemic plant is native to and restricted to a particular geographical region.

• A. Hydrophytes
• B. Heliophytes
• C. Halophytes
• D. Saprophytes

Explanation: Halophytes are plants adapted to saline habitats, including salt marshes and salty seashore wetlands.

• A. Dark cave
• B. Pond
• C. River bank
• D. Saline water

Explanation: A dark cave lacks the light required for photosynthesis, so it is generally unsuitable for the growth of green vegetation.

• A. 0.30%
• B. 0.00%
• C. 3.00%
• D. 0.03%

Explanation: Traditional forestry and ecology texts commonly state atmospheric carbon dioxide as about 0.03%, although modern measurements are closer…