Repaso T4 Science

What components exist in a ecosystem?

• Living things and plants.

• Relationships between living things and environment.

• Polar bears.

• Physical environment and plants.

There are two types of ecosystems.

• True. Forests and deserts.

• False. There are four types.

• True. Terrestial and aquatic ecosystems.

• False.

In a ecosystem there are some populations. These are:

• A group of humans living in the same place.

• A group of buildings in a city.

• A group of living things of the same species.

• A group of living things that does not live in a ecosystem.

Answer explanation

When there are many types of populations living in the same ecosystem, we call that community.

Draw the primary consumer of the food chain.

What is a family group?

• Animals of different species living all together.

• Animals of the same species that help each other and are from the same family.

• My family.

• Plants in the forest.

Choose de correct option:

Some animals cooperate to defend themselves, to travel or to obtain food.

• Family groups

• Societies

• Associations

• Mutualism

In here the queen bee reproduces and the workers bees collect pollen and defend the beehive (colmena).

• These are societies.

• These are family groups.

• These are bees.

• These are commensalism.

The relationship benefits one species.

• Mutualism

• Commensalism

• Paratism

Answer explanation

In the mutualism the relationship benefits two different species, and in the paratism the relationship benefits one species and harms the other.

How many types of main ecosystems exist?

• 3

• 2

• 4

• 454645e

In the terrestrial ecosystems we can found...

• Polar bears, fishes and seals.

• Seas, rivers and oceans.

• Forests, grasslands, deserts and polar regions.

• Coral reef, whales and salmons.