SCIENCE

Observe figures carefully and answer the following questions.

Which process is being tested in the activity?

• Exhaled air contains CO2

• Exhaled air contains O2

• Exhaled air contains both CO2 and O2

• none of the above

They are pipe-like, consisting of a group of specialized cells. They transport substances

and form two-way traffic in plants.

• Xylem tissue

• Vascular tissue

• Root hair

• Phloem tissue

Fungus, moss, and fern reproduce by a common method of asexual reproduction. Name the method.

• budding

• spore formation

• vegetative propagation

• fragmentation

Identify the method of reproduction.

• vegetative propagation - eyes

• stem cutting - stem

• bud formation - leaf

• spore formation

Identify the process A and C.

• Cross and Self-pollination.

• self and cross-pollination

• both are cross-pollination

• both are self-pollination.

Which method is better? A or C. Why?

• Method A is better. Do not depend on pollinating agents.

• Method C is better. It produces new varieties.

• Both the methods.As new varieties of plants are formed.

• None of the methods.

In the diagram given in figure 12.2, label the parts marked (a), (b), and (c).

• (a) is a pollen tube, (b)is a pollen grain, and (c) is the zygote.

• (a) is a pollen grain, (b)is the zygote, and (c) is a pollen tube,

• (a) is a stigma, (b) is a pollen tube, and (c) is the zygote.

• (a) is a pollen grain, (b) is a pollen tube, and (c) is the zygote.

A shopkeeper wanted to fix a mirror that will give a maximum view of his shop. What type of mirror should he use?

• concave mirror

• convex mirror

• both concave and convex

• plane mirror

If an object is placed at a distance of 1 m in front of a plane mirror, the distance between the object and the image formed by the mirror will be

• 1m

• 2m

• 0.5m

• 1.5m

State the correct sequence (1-7) of colors in the spectrum formed by the prisms A

• violet, indigo, blue, green, yellow, orange, and red

• red, orange, yellow, green, blue, indigo, and violet.

• red, orange, yellow, green, blue, and violet.

• None of the above