Name two 'photoperiod' dependent processes, one each in plants and in animals.

What is metapopulation?

Why is population ecology considered an important area of ecology?

What does ecological niche of an organism represent?

Why do predators avoid eating monarch butterfly?  How does the butterfly develop this protective features?

Name a 'Photoperiod' - dependent process, one each in plants and in animals.

what are hyperparasites? Mention a specific case.

Differentiate between immigration and emigration.

In an aquarium two herbivorous species of fish are living together and feeding on phytoplanktons.  As per the Gause's principle, one of the species is to be eliminated in due course of time, but both are surviving well in the aquarium.  Give possible reasons.

Name the interaction in each of the following;
(a) Cuscuta growing on a shoe-flower tree.
(b) Mycorrhizae living on the roots of higher plants.
(c) Clown fish living among the tentacles of sea anemone.
(d) Koel laying its eggs in crow's nest.

Explain why very small animals are rarely found in polar region.

Explain co-evolution with reference to parasites and their hosts. Mention any four special adaptive features evolved in parasites for their parasitic mode of life.

A population of paramoecium caudatum was grown in a culture medium. After 5 days, the culture medium became over-crowed wth paramoecium and had depleted nutrients. What will happen to the population and what type of growth curve will the population attain? Draw the growth curve.

Describe any three reproductive strategies that organisms have evolved in relation to a particular set of selective pressures.

A group of students visited a botanical garden, where they saw fungus growing on roots of higher plants only. They were confused seeing it then, their teacher told them that it is an interspecific interaction in which both species can be benefitted.
(i) Write the name of this particular association
(ii) How both are benefitted from each other?
(iii) State use of this interaction to a farmer
(iv) What values are shown by students

No species can exist alone in a habitat.  Any species has a minimal requirement of at least one more species, on which it can feed.  Interspecific interactions arise from the interaction of populations of two different species.
(a) What term is given to the interaction, where one species is benefitted and the other is neutral?
(b) Give four examples of the above kind of interaction.
(c) How do you call the interaction where one species is neutral and the other is harmed? Give an example of such an interaction.
(d) What value do you learn from this?

Community is defined as aggregation of:

The change in population size at a given time interval t, is given by the expression
N_t = N ₀ + B + I - D - E
I, B and D stand respectively for

Animals undergo inactive stage during winter is known as

Adaptation to low temperature and freezing in animal occurs due to the production of :

Select the statement which explains best parasitism.

The term ecology was coined by

Maximum growth rate occurs in