Question

Sneha always observes that most of the fruits we eat have seed/ seeds inside them. When we discard these seeds they germinate and form new plant.But she has never seen the seeds of sugarcane ,potato, rose and bryophyllum, she is confused about how these plants reproduced? Explain her by choosing right statement *

a. These plants reproduce through their vegetative parts like roots , stem, leaves and buds

b. These plants reproduce sexually

c. these plants reproduce asexually

d. both (a) and (c)

Name the type of mode of reproduction in Yeast *

a. Spore formation

b. Budding

c. Cutting

d. Fragmentation

Which part of the flower produces male gametes *

a. Ovary

b. Petals

c. Sepal

d. Anther

In flowering plants male and female gametes fuse to form a single cell. What is the name of that cell? *

a. Seed

b. Ovule

c. Zygote

d. Embryo

There is a beautiful pond near Manjeet's house. One day she noticed that the pond was covered up with a green algae within a week. By which method of reproduction did the algae spreads so rapidly? *

a. budding

b. spore formation

c. fragmentation

d. Fission

We use different cells either in combination or independently in different equipmentslike TV remote controls, toys, torches etc which of the following arrangement of cells is called a battery. *

a) The positive terminal of one cell is connected to the positive terminal of other cell and so on

b) The positive terminal of one cell is connected to the negative terminal of the next cell and so on

c) Connect all positive terminals and Negative terminals of all cells

d) None of the above

Paheli knows that electric fuses are inserted in all electrical circuits to prevent accidents by overheating or short circuit. Paheli wants to use a wire to make electric fuse. What should be the characteristics of the wire? *

a) Wire should not melt quickly and it should not break when large electric currents are passed through it.

b) Wire should be of high tensile strength and should be insulated from its ends.

c) Wire should be made from special material so that it melts quickly and breaks when large currents are passed through it.

d) None of the above

These days MCBs are increasingly being used in place of fuses. These are switches which automatically turn off when current in a circuit exceeds the safe limit what is the correct name of MCB *

a) Maximum current breaker

b) Minimum current breaker

c) Miniature circuit box

d) Miniature circuit breaker

A bus travels 54 km in 90 minutes. The speed of the bus is *

(a) 0.6 m/s

(b) 10 m/s

(c) 5.4 m/s

(d) 3.6 m/s

Observe the figure given below:The time period of a simple pendulum is the time taken by it to travel from *

(a) A to B and back to A

(b) O to A, A to B and B to A

(c) B to A, A to B and B to O

(d) A to B

Which of the following cannot be used for measurement of time? *

(a) A leaking tap

(b) Simple pendulum

(c) Shadow of an object during the day

(d) Blinking of eyes

Boojho walks to his school which is at a distance of 3 km from his home in 30 minutes. On reaching he finds that the school is closed and comes back by a bicycle with his friend and reaches home in 20 minutes. His average speed in km/h is *

(a) 8.3

(b) 7.2

(c) 5

(d) 3.6

Which one of the following is based on the heating effect of current? *

(a) Geyser

(b) Hair dryer

(c) Immersion rod

(d) All of these

The path of the light is *

(a) always a straight line

(b) a curved line

(c) a zig-zag line

(d) depends on the medium

Image formed by a plane mirror is *

(a) virtual and erect

(b) real and erect

(c) virtual and inverted

(d) real and inverted

Boojho and Paheli were given one mirror each by their teacher. Boojho found his image to be erect and of the same size whereas Paheli found her image erect and smaller in size. This means that the mirrors of Boojho and Paheli are, respectively *

(a) plane mirror and concave mirror

(b) concave mirror and convex mirror

(c) plane mirror and convex mirror

(d) convex mirror and plane mirror

If an object is placed at a distance of 0.5 m in front of a plane mirror, the distance between the object and the image formed by the mirror will be *

1 point

(a) 2 m

(b) 1 m

(c) 0.5 m

(d) 0.25 m

Lenses are mainly of two types. If we touch first kind of lens we may feel them to be thicker in the middle than at the edges and these lenses are called----------- while lenses of other kind are thinner in the middle than at the edges. These are known as ___ respectively *

a. Convex lens, concave lens

b. concave lens, convex lens

c. convex lens, convex lens

d. concave lens, concave lens

An image which cannot be obtained on a screen is called *

a. Real image

b. Virtual image

c. Real or virtual image

d. None of the above

Identify the device from the given picture *

a) A Magnet

b) An electromagnet

c) An electric bell

d) None of the above





can anyone pls answer these questions pls​

Answer 1

omg this is such a big question

Answer 2

Answer:

the path of a light is always straight.