2. All animals need food to survive. An animals species can be a food source to another.
3. If some species of animals and plants become extinct, other species may also face extinction.
4. When this happens, we will face a shortage of resources.
5. The survival of humans also depends on the survival of animals and plants. We cannot live without them.
REVISION
- Besides mammals, birds, some reptiles( crocodile, snakes) and certain fish take care of their eggs and young.
- The tilapia fish carries its eggs in its mouth until they hatch into small fish.
- A father penguin withstands the extreme cold of the Antarctic for 60 days to incubate its egg by keeping it on its feet. It loses a lot of weight to keep the egg safe. The mother hunts for food.
- To ensure the survival of the species, animals
* lay eggs or give birth to young.
* keep the eggs in safe places.
* take care of their eggs and young.
- The main function of seeds is to ensure that the plant species continues to exist.
- The dispersal of seeds and fruits ensures the survival of the species.
Test Yourself:
1. The diagram below shows an activity of an animals.
What is the purpose of these activities?
A. Preservation
B. Conservation
C. Competition
D. Survival of the species
Explanation
A bird incubates the eggs so that the eggs will hatch. It then feeds the chicks so that the species continues to exist.
Answer: D
2. The diagram below shows the fruit of a plants.
Which plant disperses its fruit in the same way as the above plant?
A. Love grass
B. Dandelion
C. Coconut
D. Guava
Explanation:
- The lallang fruit has fine hairs. It is dispersed by wind.
- Love grass has hooks. It is dispersed by animals.
- The dandelion seeds have fine hairs. It is dispersed by wind.
- The coconut can float. It is dispersed by water.
- The guava has a fleshy and edible fruit. It is disperse by animals.
Answer: B
No comments:
Post a Comment