Cuestionario sobre seres vivos y ecosistemas

Living beings are organisms that...

• breathe through lungs.

• perform three vital processes.

• are composed of a single cell.

Answer explanation

Living beings are defined by their ability to perform three vital processes: metabolism, growth, and reproduction. The other options are too specific and do not apply to all organisms.

We classify living beings into five groups called...

• kingdoms.

• families.

• protoctists.

Answer explanation

Living beings are classified into five groups known as kingdoms. This classification helps in organizing and understanding the diversity of life forms, making 'kingdoms' the correct choice over 'families' or 'protoctists'.

Most fungi grow...

• in food.

• on trees.

• underground.

Answer explanation

Most fungi thrive in food sources, as they decompose organic matter. While some may grow on trees or underground, their primary habitat is often within food, where they can access nutrients for growth.

The protoctista kingdom includes...

• animals and plants.

• protozoa and algae.

• fungi and mold.

Answer explanation

The protoctista kingdom primarily includes protozoa and algae, which are unicellular and simple multicellular organisms. Animals and plants belong to separate kingdoms, while fungi and mold are classified under the fungi kingdom.

Bacteria are...

• multicellular living beings.

• unicellular living beings.

• not living beings.

Answer explanation

Bacteria are unicellular living beings, meaning they consist of a single cell. This distinguishes them from multicellular organisms, which are made up of multiple cells.

Ecosystems can be...

• aquatic or coastal.

• aquatic or terrestrial.

• terrestrial or desert.

Answer explanation

Ecosystems are classified into two main types: aquatic, which includes water-based environments, and terrestrial, which encompasses land-based environments. Therefore, the correct answer is aquatic or terrestrial.

Light, temperature, and ... affect aquatic ecosystems.

• rocks

• algae

• salt

Answer explanation

Salt is a crucial factor in aquatic ecosystems as it influences water density, salinity, and the types of organisms that can thrive. Unlike rocks or algae, which are not environmental factors, salt directly affects aquatic life.

The temperature, humidity, relief, and soil affect...

• terrestrial ecosystems.

• aquatic ecosystems.

• saltwater ecosystems.

Answer explanation

The temperature, humidity, relief, and soil are key factors that influence terrestrial ecosystems, as they directly affect plant growth and animal habitats. Aquatic and saltwater ecosystems are primarily influenced by water conditions.

The most biodiverse ecosystems are...

• tropical rainforests and coral reefs.

• deserts and polar regions.

• mountains and valleys.

Answer explanation

Tropical rainforests and coral reefs are the most biodiverse ecosystems due to their complex structures and variety of habitats, supporting a vast number of species compared to other environments like deserts or polar regions.

Extinction is...

• a reduced population of a species.

• a type of energy source.

• the disappearance of a species.

Answer explanation

Extinction refers to the complete disappearance of a species from Earth. It is not merely a reduced population, nor is it related to energy sources. Therefore, the correct answer is 'the disappearance of a species.'