Question

D. LONG-ANSWER QUESTIONS: Answer these questions.
1. Explain with an example what is meant by 'living things respond to stimuli”.
from the growth of living things?
3. List three ways in which living things reproduce, giving one example of each.
4. List four different ways in which organisms carry out exchange of gases for respiration, with
one example of each.
world also?
6. Explain giving examples what you mean by a 'species'.
2. How do living things grow? Some non-living things also grow. How is their growth different
5. Explain phototropism and geotropism in plants. Are there any similar examples in the animal​

Answer 1

Answer:

1. All living things are able to respond to stimuli in the external environment. For example, living things respond to changes in light, heat, sound, and chemical and mechanical contact. To detect stimuli, organisms have means for receiving information, such as eyes, ears, and taste buds.

2. Living things grow by the division of cells. Unicellular organisms such as Amoebae grow by an increase in the size of the single cell that makes up the organism. Non-living things grow by the addition of material from outside.

3. (a) By seed – wheat, fruits etc.

(b) By baby – human being, dog, cow etc.

(c) By eggs – snakes, hen etc.

4. (a) Fishes respire using their gills.

(b) Earthworms use their skin for respiration.

(c) Insects such as cockroaches breathe through several tracheal tubes in their bodies.

(d) Humans and many other animals such as cows, goats etc. respire through external nostrils, which supplies air to their lungs.

5. Phototropism is the response of a plant to sunlight. Geotropism is the response of stems and roots towards and against the Earth. An example of phototropism in the animal world is ants as they're attracted or they respond to sunlight and mostly come out during the day.

6. The definition of a species is a group of animals, plants or other living things that all share common characteristics and that are all classified as alike in some manner. An example of a species is all human beings.