F. Fill in the blanks. 1. The two main climatic factors that influence natural vegetation are ______ and ______. 2. In tropical regions, deserts are found at the ______ margins of continents, while deciduous forests are found at the ______ margins. 3. Lions and zebras are to the African savanna what ______ and ______ are to the North American prairies. 4. The ______ is a natural scavenger which is now endangered in India. 5. The full form of CITES is ______. 6. In India, ______ is celebrated to encourage the planting of trees. G. State whether the following statements are true or false. 1. Plants and animals are natural resources. 2. Severe and lasting changes in the environment may cause some plants and animals to become extinct. 3. Across regions, trees increase in height as the rainfall decreases. 4. The length of the growing season of a plant depends on the amount of rainfall. 5. A biome may consist of several ecosystems, both terrestrial and aquatic. 6. Some animals are bred in captivity to save them from extinction.
Answer (1)
F. Fill in the blanks:
The two main climatic factors that influence natural vegetation are temperature and precipitation . These factors determine the types of vegetation that can thrive in a particular area by affecting plant growth, reproduction, and survival.
In tropical regions, deserts are found at the western margins of continents, while deciduous forests are found at the eastern margins. This is due to the varying influence of ocean currents and wind patterns on the climate of these regions.
Lions and zebras are to the African savanna what bison and prairie dogs are to the North American prairies. Bison and prairie dogs play similar roles in the prairie ecosystem to lions and zebras in the savanna.
The vulture is a natural scavenger which is now endangered in India. Factors such as habitat loss and poisoning from veterinary drugs like diclofenac have contributed to their decline.
The full form of CITES is Convention on International Trade in Endangered Species of Wild Fauna and Flora . It is an international agreement aimed at ensuring that international trade in specimens of wild animals and plants does not threaten their survival.
In India, Van Mahotsav is celebrated to encourage the planting of trees. It is a tree-planting festival that takes place in the first week of July each year.
G. State whether the following statements are true or false:
Plants and animals are natural resources. True. They provide essential ecosystem services and are important for human survival and wellbeing.
Severe and lasting changes in the environment may cause some plants and animals to become extinct. True. Drastic changes in climate, habitat destruction, and pollution can lead to extinction.
Across regions, trees increase in height as the rainfall decreases. False. Generally, trees tend to increase in height with more rainfall, as water is a crucial factor for their growth.
The length of the growing season of a plant depends on the amount of rainfall. True. Sufficient rainfall can extend the growing season, allowing plants to grow and reproduce.
A biome may consist of several ecosystems, both terrestrial and aquatic. True. A biome is a large geographical area that includes various ecosystems sharing similar climate conditions.
Some animals are bred in captivity to save them from extinction. True. Captive breeding programs are conducted to help prevent the extinction of endangered species.
