Importance for NEET
In NEET syllabus, Ecology covers four chapters like organisms and populations, ecosystem, biodiversity and conservation and Environmental issues. 11 to 12 questions will appear from this unit in NEET. Students should concentrate over the terms like photo taxis, photo kinesis, phototropism, photoperiodism, biological rhythms, summer and winter stratification in lakes, fall and spring overturns and their significance in dimictic lakes. They should prepare about various rules and observations like Van't Hoff's rule, Bergman's rule, Allen rule, Gause's principle of competitive exclusion, Connell's experiments about competitive release, MacArthur's observation about coexistence of Warblers birds etc. Examples given under various biotic communities like emergent vegetation, submerged vegetation, zooplankton, nekton, neuston, periphyton and benthos in lake ecosystem are most important. Energy flow, ecological pyramids, population interactions, different types of bacteria in nitrogen cycle, factors which influence the population density like natality, immigration, mortality, emigration, growth models are also most important in this unit. Preventive measures of pollution like catalytic converters, electrostatic precipitators, scrubbers, incinerators, BOD and COD, eutrophication, algal bloom, biomagnification etc., also important contents. Latest events like The United Nations Climate Change Conferences (COP) and their main agenda are asking more frequently.
NEET-I 2016 QUESTIONS
1. It is much easier for a small animal to run uphill that for a large animal, because:1) small animals have lower O2 requirement
2) the efficiency of muscles in large animals is less than in the small animals.
3) it is easier to carry small body weight
4) smaller animals have a higher metabolic rate
2. When does the growth rate of a population following the logistic model equal zero? The logistic
model is given as dN/dt = N/K
1) When N/K equal is zero
2) When death rate is greater than birth rate
3) When N/K is exactly one
4) When N nears the carrying capacity of the habitat
3. Gause's principle of competitive exclusion states that:
1) no two species can occupy the same niche indefinitely for the same limiting resources.
2) largest organisms exclude smaller ones through competition
3) more abundant species will exclude the less abundant species through competition
4) competition for the same resources exclude species having different food preference
1) E. Haeckel
2) E.Warming
3) E.P. Odum
4) A.G.Tansley
5. Which is the National Aquatic Animal of India?
1) Blue whale
2) Sea horse
3) Gangetic shark
4) River dolphin
6. Which of the following is the most important cause of animals and plants being driven to extinction?
1) Habitat loss and fragmentation
2) Co-extinction
3) Over-exploitation
4) Alien species invasion
NEET-II 2016 QUESTIONS
7. Which of the following is correct for r selected species?1) Large number of progeny with small size
2) Large number of progeny with large size
3) Small number of progeny with small size
4) Small number of progeny with large size
8. If '+' sign is assigned to beneficial interaction, '−' is to detrimental and '0' sign to neutral interaction, then the population interaction represented by '+' '−' refers to:
1) Mutualism
2) Amensalism
3) Commensalism
4) Parasitism
9. The primary producers of the deep-asea hydrothermal vent ecosystem are:
1) Green algae
2) Chemosynthetic bacteria
3) Blue green algae
4) Coral reefs
10. How many hotspots of biodiversity in the world have been identified till date by Norman Myers?
1) 17
2) 25
3) 34
4) 43
