Question

1. What is adaptation?
2. What are the main characteristics of living things?
3. How can a frog live both on land and in water?​

Answer 1

Explanation:

1. An amphibian is a class of animals that live their lives both in and out of water. There are three orders within this class, the most common of which includes frogs and toads. Learn more about these animals, and take a short quiz at the end.

2. Some characteristics of living things:

(a) Growth (b) Reproduction (c) Responsiveness

(d) Movement (e) Respiration (f) Excretion.

3. Frogs are the animals that live on both land and in water, and also they have strong back legs so that it helps them in leaping and catching their prey in a spontaneous way. They also have webbed feet which help them to swim in water in approximate speed.

Answer 2

Explanation:

1. 1 The special characteristics that enable plants and animals to be successful in a particular environment are called adaptations

• 2 Movement

All living things move in some way. This may be obvious, such as animals that are able to walk, or less obvious, such as plants that have parts that move to track the movement of the sun.

Earthworms use circular and longitudinal muscles to move through soil or along surfaces.

• Respiration

Respiration is a chemical reaction that happens within cells to release energy from food.

The food that earthworms eat supplies their body with energy-rich molecules such as glucose. On entering the cells of their body, these molecules are broken down in a series of steps to release energy to be used by the body, producing carbon dioxide and water as waste products.

• Sensitivity

The ability to detect changes in the surrounding environment.

Earthworms have light-sensitive cells scattered in their outer skin. Their skin cells are also sensitive to touch and chemicals.

• Growth

All living things grow.

Earthworms hatch from eggs and can grow up to a metre or more in length! Some earthworms are also able to regrow small parts of their body that have been lost or injured.

• Reproduction

The ability to reproduce and pass genetic information onto their offspring.

Earthworms have both sperm and eggs within their bodies (they are hermaphrodites) but they cannot self-fertilise and need to mate with another individual. After mating, a cocoon containing the fertilised eggs is deposited in the soil.

• Excretion

Getting rid of waste.

Earthworms excrete waste from their anus – the last segment of their body.

• Nutrition

The intake and use of nutrients. This occurs in very different ways in different kinds of living things.

Earthworm nutrition comes from a variety of sources, depending on their species. Food types include manure, compost, plant material, fungi, microorganisms and decaying animals. They take in food through their mouths.

3 frog is an amphibian so it has dual mode of respiration so it can live both on land and in water on land it has pair of lungs to breathe in and in water it breathes through moist skin ..

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