1Fill in the blank: the ability of a living thing to fit in with its surroundings is called ......... .
2Fill in the blank: water animals breathe through ......... or through the skin.
3Fill in the blank: the stem of a land plant is hard and ......... .
4Fill in the blank: plants of hot and dry places can store ......... inside themselves.
5Fill in the blank: the stem of a water plant is ......... .
6Write the difference between water hyacinth and maize.
7Write the difference between animals that live in water and animals that live on land.
8Write one job each of these animal parts: (a) fins (b) gills (c) sharp claws (d) a pointed snout (e) a paw with sharp claws.
9Write any four adaptive characteristics of animals that live on land.
10Write any four adaptive characteristics of animals that live in water.
11How do the long hairs on the bodies of sheep and chauri cattle of the mountains help them to survive there?
12A fish can live easily in water but a mouse cannot. Why? Answer from the way their bodies are built.
13How do broad paws and claws help a tiger and a bear to fit into their surroundings?
14Pemba loves the lotus flowers in the village pond and thinks of planting a lotus in a flower pot at home. Can the flower bloom there? Give your opinion with reasons.
15Compare the leaf, the stem and the root of a water hyacinth with those of a cactus.
16Write any three characteristics of herbivores.
17Write any three features of the body of a carnivore.
18Write any four differences between herbivores and carnivores.
19A dog eats not only meat but rice as well. Can it be called an omnivore? Give your reasons.
20On the basis of how it gets its food, what kind of animal is a human being? Explain with reasons.
21Into how many classes are vertebrates divided? Name them.
22Which features let birds fly? Write any three.
23Why is the garden lizard placed in the class reptilia?
24Why are the bat and the whale placed in the class mammalia?
25Distinguish between warm blooded and cold blooded animals.
26Name three animals that hatch their young from eggs and three that give birth to young ones directly.
27Fill in the blanks: plants that never bear flowers are called ......... and plants that bear flowers are called ......... .
28Write three differences between flowering and non-flowering plants.
29Sort these plants into flowering and non-flowering groups: mushroom, fern, mustard, rice, buckwheat.
30Which is the more developed plant, mustard or fern? Make it clear with reasons.
31Have you watched a house lizard walk across a wall? How does it hold on there?
32We wear thick clothes in the cold months. What part do such clothes play in keeping our body temperature steady?
33Compare the adaptations of a desert camel with those of a chauri of the high mountains.
34Why is a duck's beak shaped so differently from a woodpecker's?
35What do you see when you split open a maize grain and a bean seed, and what does that tell you?