Question 5 :
................ is a measure of the variety of organisms present in different ecosystems.

Question 7 :
Species going to be extinct due to low reproductive rate is<br/>

Question 15 :
The state of Gujarat has river, desert, forest and lake ecosystems, thus exhibiting a diversity of life. This is an example of ................. diversity.<br/>

Question 18 :
The relation between species richness and area is correctly depicted by<br>

Question 19 :
Match List-I with List-II and select the correct answer using the code given below the Lists: <br/><table class="wysiwyg-table"><tbody><tr><td></td><td><b>List-I (Region)</b></td><td></td><td><b>List-II (Characteristic vegetation)</b></td></tr><tr><td>A.</td><td>Selvas</td><td>1.</td><td>Tropophytes</td></tr><tr><td>B.</td><td>Savanna</td><td>2.</td><td>Mosses and lichens</td></tr><tr><td>C.</td><td>Tundra</td><td>3.</td><td>Epiphytes</td></tr><tr><td>D.</td><td>Monsoon land</td><td>4.</td><td>Grasses and trees</td></tr></tbody></table>

Question 21 :
Vertical distribution of different species occupying different levels in dense vegetation is called.

Question 23 :
Which one of the following is a characteristic feature of cropland ecosystem?<br>

Question 25 :
Assertion: Tropical rain forests are disappearing fast from developing countries such as India. Reason: No value is attached to these forests because these are poor in diversity.

Question 26 :
The presence of diversity at the junction of territories to two different habitats is known as

Question 28 :
Assertion: Tropical regions had got a long evolutionary time for species diversification as compared to temperature regions. Reason: Temperature regions have undergone frequent glaciations in the past whereas tropical regions have remained relatively undisturbed for millions of years.