The following diagrams are the age pyramids of different populations. Comment on the status of these populations.

Comment on the growth curve given below.

Give one example for each of the following:
(i) Eurythermal plant species_________.
(ii) A hot water spring organism _________.
(iii) An organism seen in deep ocean trenches _________.
(iv) An organism seen in composite pit_________.
(v) A parasitic angiosperm _________.
(vi) A stenothermal plant species _________.
(vii) Soil organism _________.
(viii)  A benthic animal Soil organism _________.
(ix) Antifreeze compound seen in antarctic fish Soil organism_________.
(x) An organism which can conform Soil orga.niam_________.

Comment on the following figures 1,2 and 3 : A,B,C,D,G,P,Q,R,S are species

Does light factor affect the distribution of organisms? Write a brief note giving suitable examples of either plants or animals.

Himani while watching a TV programme based on life in polar region observed that all animals in polar regions possess larger size. Also, smaller animals are not found in that region. She asked about this surprising fact to her teacher.
(i) why smaller animals (e.g. humming birds) are rarely found in polar regions?
(ii) What are the adaptations shown by polar animals?
(iii) What are the chief characteristics of polar region animals?
(iv) What values are shown by Himani?

Ramesh visited a National Park on a school trip where he saw tiger eating a deer. He got disturbed and asked his teacher why is he doing so. His teacher replied that it is natural population controlling phenomenon.
(i) Which type of interspecific interaction is found between tiger and deer?
(ii) State the role of predators
(iii) What other type of population interaction are seen in nature?
(iv) State the values of Ramesh towards animals

(i) List the different attributes that a population has and not an individual organism.
(ii) What is population density? Explain any three different ways the population density can be measured, with the help of an example each.

The following diagrams are the age pyramids of different populations. Comment on the status of these populations.

A population od Paramecium caudatum was grown in a culture medium. After 5 days the culture medium became overcrowded with Paramecium and had depleted nutrients.
What will happen to the population and what type of growth curve will the population attain?Draw the growth curve.