Std: X Sub: Science II Marks: 40
Q.1 A) Choose the correct alternative and rewrite the statements (5)
1. In humans ……………… chromosomes is responsible for maleness.
(a) X (b) Y (c) XX (d) Z
2. ……………. Crop fields are frequently attacked by frogs.
(a) Pea (b) Jowar (c) Paddy (d) maize
3. Burning of coal may cause serious health problems related to ………. System.
(a) Nervous (b) Digestive (c) Circulatory (d) respiratory
4. …………….. of birds is present in the form of feathers.
(a) Endoskeleton (b) Skeleton (c) Exoskeleton (d) Neck
5. Bat is included in which class?
(a) Amphibia (b) Reptelia (c) Ares (d) Mammalia
B) Answer in one word. (5)
1. ……………. Can be considered as the first example of wise man.
2. Who discovered the cyclical reaction tricarboxylic acid cycle.
3. During favorable conditions multiple fission is performed by amoeba ; (Say true or false)
4. What is the meaning of sporgenesis?
5. Solar cells are made of a special type of material called …………
Q.2) Answer the following. (Any 5) (10)
1. What are sessile and pedicellate flowers?
2. Which is a perfect site for the installation of wind turbines?
3. What is ecosystem? Which are its different components?
4. Distinguish between chordates & Non chordates.
5. Complete the following conceptual picture.
6. Define pollination. Write its types.
Q.3) Answer the following (Any 5) (15)
1. Give reasons.
Hydroelectric energy, solar energy and wind energy are called renewable energies.
2. Sketch and label the given diagram.
Human female reproductive system.
3. How are the hereditary changes responsible for evolution?
4. Explain with diagram step by step energy conservation in hydroelectric power plant.
5. Write the types and examples of bio diversity?
6. Name types of asexual reproduction in multicellular organism.
Q.4) Answer in Brief (Any 1) (5)
1. Explain sexual reproduction in plants.
2. Write any five characteristics of class Aves.
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