Practice free Botany NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
Connell's elegant field experiments are related to:
Connell’s field experiment was related to dominancy of large barnacles- Balanus over small balanus- Chathalamus on rocky sea coast.
(page-235)
Select the false one:
All of the above statements are correct.
(page-235)
A bird introduced from another country became a serious pest due to:
When a foreign bird is introduced into a new habitat, due to different feeding requirements, there is no competitor present, due to which it became a serious pest.
Through resource partitioning:
If two species compete for the same resource, they could avoid competition by choosing, for instance, different times for feeding or different foraging patterns. This is resource partitioning allows species facing competition to evolve mechanisms that promote co-existence rather than exclusion.
(page-235)
When the value of 'r' is significantly low as compared to another species, it is better known by:
The r is called the ‘intrinsic rate of natural increase’ and is a very important parameter chosen for assessing impacts of any biotic or abiotic factor on population growth.
One organism prevent another organism from using the resource in interference competition.
(page-230)
At the trophic level of consumers, the rate at which food energy is assimilated, is called:
Secondary production represents the formation of living mass of a heterotrophic population or group of populations over some period of time. It is the heterotrophic equivalent of net primary production by autotrophs.
The major reservoir for phosphorous is
Read page 254, XII NCERT
Which of the following pyramids can never be inverted in a natural ecosystem?
Read page 249, XII NCERT
The earth is an open system with respect to
A constant input of energy is required to keep the stability of the ecosystem and overcome any entropy. This input is ultimately provided by the sun.
The earth is a closed system except for:
Read page 245, XII NCERT
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