Sunken stomata are found in the leaves of:

A. Nelumbium
B. Hydrilla
C. Mango
D. Nerium

The heliophytes possess:

A. Low K+ concentration and low O.P
B. High K+ concentration and low O.P
C. Low K+ concentration and high O.P
D. High K+ concentration and high O.P

Soil formed-after leaching and rich in Al and Fe is

A. Alluvial
B. Padsol
C. Laterite
D. None of these

Soil particles of size 0.03 mm belong to the class of:

A. Coarse sand
B. Silt
C. Fine sand
D. Clay

Edaphic factor is due to:

A. Man
B. Temperature
C. Soil
D. Herbivores

Endemic plants are those which are:

A. Cosmopolitan in distribution
B. Restricted to, grow over certain areas
C. Found in arctic region
D. Gregarious in habit

According to Mc Dougal, the parasitism caused due to fungi and bacteria represent a symbiotic relationship which is:

A. Social and antagonistic
B. Nutritive and antagonistic
C. Social and reciprocal
D. Nutritive and reciprocal

Mullerian mimicry is useful to:

A. Mimic only
B. Model only
C. Both (a) & (b)
D. Either of these

The science of ecology has been defined as the study of the structure and function of nature by:

A. Odum
B. Misra
C. Warming
D. Maeckel

Flag trees’ are formed due to:

A. Lodging
B. Erosion and deperition
C. Unidirectional wind
D. Salt spray