Q32. The vegetation of savannah consists of grassland with scattered small trees, but extensive areas have no trees. The forest development in such areas is generally kept in check by one or more or a combination of some conditions. Which of the following are such conditions? 1. Burrowing animals and termites 2. Fire 3. Grazing herbivores 4. Seasonal rainfall 5. Soil properties Select the correct answer using the code given below.

In the grasslands, trees do not replace the grasses as a part of an ecological succession because of:

Which of the following is/are unique characteristics/characteristics of equatorial forests ? 1. Presence of tall, closely set trees with crowns forming a contin

Which of the following can be threats to the biodiversity of a geographical area? 1. Global warming 2. Fragmentation of habitat 3. Invasion of alien species 4.

With reference to the circumstances in Indian agriculture, the concept of “Conservation Agriculture” assumes significance. Which of the following fall under the

With reference to soil conservation, consider the following practices: 1. Crop rotation 2. Sand fences 3. Terracing 4. Wind breaks Which of the above are consi

Consider the following statements : Statement-I : The soil in tropical rain forests is rich in nutrients. Statement-II : The high temperature and moisture of tr

In India, the problem of soil erosion is associated with which of the following? 1. Terrace cultivation 2. Deforestation 3. Tropical climate Select the correct

The organisms “Cicada, Froghopper, and Pond skater” are:

Consider the following statements: Statement-I: Marsupials are not naturally found in India. Statement-II: Marsupials can thrive only in montane grass

Consider the following fauna: 1. Lion-tailed Macaque 2. Malabar Civet 3. Sambar Deer How many of the above are generally nocturnal or most active afte

Which of the following organisms perform waggle dance for others of their kin to indicate the direction and the distance to a source of their food?

Consider the following statements: 1. Some microorganisms can grow in environments with temperature above the boiling point of water. 2. Some microorg

Which one of the following makes a tool with a stick to scrape insects from a hole in a tree or a log of wood?

Consider the following statements: 1. In India, the Biodiversity Management Committees are key to the realisation of the objectives of the Nagoya Prot

Which one of the following is used in preparing a natural mosquito repellent?