A. Rain fall
B. Frequent cyclones
C. Erosion of surface soil
D. Frequent landslides
Related Mcqs:
- Deforestation causes:
A. Soil erosion
B. Pollution
C. No floods
D. None of these - The bacteria, which reduce nitrates in the soil to gaseous nitrogen, are known as denitrifying bacteria such as:
A. Nitromonas
B. Pseudomonas
C. Nostoc
D. Rhizobium - Aerosols reduce primary productivity by:
A. Decreasing O2
B. Reducing photosynthesis
C. Competing with CO2
D. Being toxic to chloroplasts - Sometimes sound and uninjured seeds may fail to germinate due to reduced activity of the seed or seed parts resulting in blockade of the growth. This may be due to:
A. External effects of environment
B. Internal conditions within the plant itself, i.e. Embryo dormancy or seed coat dormancy
C. Both (a) & (b)
D. None of these - A watershed may be just be small depression of the land or it may comprise whole sub-continents as for the large river basins of the earth:
A. Wolga
B. Indus
C. Ganges
D. Amazonas
E. All of the above - Constant grazing and browsing in an area may ultimately result in the formation of:
A. Dense forest
B. Grassland
C. Bushy vegetation
D. Desert - Regeneration may be effected by how many ways?
A. Natural regeneration from seed
B. Natural regeneration from coopice
C. Artificial regeneration sowing and planting
D. All of the above - People taking food adequate in calories but deficient in protein may suffer from:
A. Malformation
B. Malfunction
C. Malnutrition
D. Undernourishment - Temperature – with June the hottest month, summer (May to August) in plains is very hot and daily maximum temperature normally exceed 40
A. Upper Punjab
B. Upper Sind
C. Upper KPK
D. None of these - A lake with an inflow of domestic sewage rich in organic waste may result in:
A. Drying of the lake very soon due to algal bloom
B. An increased production of fish due to lot of nutrients
C. Increased population of aquatic food web organisms
D. Death of fish due to lack of oxygen
The correct answer to the question: "Deforestation may reduce the chances of:" is "Rain fall ".