1.
Option B
2.
Option C
3.
Option B
4.
Option C
5.
Option A
6.
The moon appears to be changing in shape everyday because 1. Moon does have its own light, rather it reflects light of the sun. 2. Hence depending upon the position of the sun, different areas of moon reflect light on different days.
7.
Option B
Solution:
Some give birth to young ones, while others lay eggs.
8.
Option C
9.
Option A
10.
There are two different types of muscle injury. (A). Muscle strain- Muscle strain is a stretching or tearing of muscle. There are four types of muscles: 1.Spindle-shaped muscles, which are thick in the middle and thinner at the ends, such as biceps and triceps in arm
2.Flat muscles, such in forehead.
3.Triangular muscles, such as the deltoid muscles in shoulder.
4.Circular muscles, which are shaped like rings, such as around mouth.; (B). Muscle sprain - Muscle sprain is a stretching or tearing of ligaments. Usually effects on joints.
11.
Option B
12.
Option A
13.
Raw vegetables, leafy vegetables, fruits, salads.
14.
Option C
15.
Option A
16.
Option A
17.
1. During metamorphosis, frog lays up to 4,000 eggs at one time. The clusters of floating eggs are called egg masses". 2. Tadpoles hatch from the eggs and live in the pond. 3. The tadpoles turn into Froglets. The body shrinks and legs form. 4. The Froglet's tail shrinks, the lungs develop and the back legs grow and the frog is developed.
18.
Option A
19.
Type of muscles are as follow- 1. Voluntary or Skeletal Muscles – This muscles can be consciously controlled. Human has more than 600 skeletal muscles. These type of muscles are attached either directly or indirectly to the bones and work in opposing pairs i.e. one muscle in the pair contracts while other relaxes to produce movement. These are found in arms, legs, eyes, tongue etc. Thus while reading, writing, walking or running, we use voluntary muscles.
2.Smooth muscles – These muscles are found in the internal body organs and works automatically. They perform action such as forcing food through intestine.
3.Cardiac Muscles – These are found only in heart. These are involuntary muscles responsible for pumping blood throughout the body.
20.
Option C