Define the following terms

Eutrophication

Ecoclines

Plankton

Predation

Residual soil

Fill in the blanks:

Bright light loving plants are called

is a free floating plant.

is a large community unit that is characterised by the kind of plants and animals present in it.

State whether the given statements are True or False:

Most of the world's deserts are situated at 60° latitude.

All ecosystems have well defined boundaries.

The composition of the atmosphere is constant upto 80 km of height.

Ecological natality is not constant for a population.

2. Differentiate between any four of the following:

Internal and External nutrient budgets

Stationary and Stable populations

Nitrification and Denitrification

Colluvial and Alluvial soils

Temperate evergreen forests and Temperate rain forests

How does social forestry help in forest conservation? Explain.

Explain with the help of illustrations the cation exchange capacity of soil.

What is meant by demographic transition? Explain its different phases.

Write the major adaptations in primates that ultimately led to the origin of first Homo species.

5. Write short notes on any four of the following. Give illustrations wherever necessary.

Kinds of succession

Pelagic zone

Gregariousness of plants

Soil profile

A case of selective destruction of wildlife

Briefly explain the biota of lakes.

Differentiate between the two basic types of biogeochemical cycles. Diagrammatically represent anyone biogeochemical cycle.