Eichhornia cressipes is a:

Related Mcqs:

1. In which one of the following pairs is the specific characteristic of a soil not correctly matched?

   A. Terra rossa – Most suitable for roses
   B. Chernozems – Richest soil in the world
   C. Black soil – Rich in calcium carbonate
   D. Laterite – Contains aluminium compound

2. Microorganism living in our intestine and feeding on excreta is:

   A. Mutualism
   B. Symbiosis
   C. Co-operation
   D. Commensalism

3. Ephemeral xerophytes are those that are:

   A. Drought resisting
   B. Drought escaping
   C. Drought enduring
   D. None of these

4. Possibilities of presence of coal in a particular area can be guessed by the study of:

   A. Economic Botany
   B. Ecology
   C. Pollen analysis
   D. Mining the area

5. The air density is maximum:

   A. Above 32′
   B. At the soil surface
   C. Between 32′ – 64′ from soil level
   D. In the hydrosphere

6. Which of the following feature is found in xerophytes?

   A. Equally developed palisade and spongy parenchyma
   B. Multistratose epidermis
   C. Non-functional stomata
   D. None of these

7. In coarse textured soils:

   A. There is no soil air
   B. Water retaining capacity is high
   C. Pore space is narrow
   D. Pore frequency is low

8. The transition zone between two different types of communities is called:

   A. Biome
   B. Ecotone
   C. Biological spectrum
   D. Biological clock

9. Tropical dense forest is due to:

   Tropical dense forest is due to:
   A. Low temperature and excess rain
   B. High temperature and excess rain
   C. High temperature and lesser rain
   D. Wild animals (tigers, lions, bears etc.)

10. The soils that are fully laden with water i.e., water logged, are known are:

    A. Physically dry soils
    B. Physiologically dry soils
    C. Alkaline soils
    D. Acidic soils