Question

The figure below depicts life-history strategies for three plant species (a.b and c) along 3 axes: strength of competition with other organisms, level of disturbance in the habitat, and level of environment stress in the habitat. Species a grow in habitat where competition among species is high but disturbance and stress are low. Species b grows in habitats with high environmental stress but with low inter species competition.

Species c grows in highly disturbed habitats with low environment stress.
Which of the statement below is/are correct?
I. Characteristics of "a-type" plants are faster growth rate and short-lived leaves.
II. Desert annual plants are "b-type" species. They have rapid growth and produce large amount of seeds in a short time after rains.
III. Most plants belonging to "c-type" species would be herbaceous while "a-type and "b-types" species are likely to be tress or shrubs

• A. only II
• B. I and II
• C. I and III
• D. II and III

Answer 1

The correct option is D II and III

Plant a types of plants grow in regions where environmental competition is high. The stress and disturbance in their environment are quite low. This means that stress due to drought, nutritional deficiency, etc. They are also not affected by environmental disturbances like by humans. So, due to the competition, they have a slow growth rate. they are also not short-lived as they don't have to face much competition.

So, statements II and III are correct.

So, option D is the correct answer.