Science

What´s evolution?

• A natural, continuous, and dynamic process through which species adapt to the environment.

• A linear process in which all species have a common ancestor.

• Different transformations in an individual of a population.

• The developing of new species in response to changes of the environment.

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Which are the main domains for classification?

• Bacteria and eukarya

• Archaea, prokaryotic, and eukaryotic

• Eukaryotic and prokaryotic

• Archaea, bacteria, and eukarya

Which is an example of direct evidence?

• Bacteria and antibiotic resistance

• Fossils

• World distribution of the organisms

• Genetic breeding of dogs

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What is the main idea of natural selection?

• Individuals in a population are the same and acquire the necessary characteristics to survive.

• These adaptations are transmitted to the offspring.

• Species use some organs more than others. Its use specializes them, and its disuse makes them disappear.

• A variability in a population that leads them to different responses to environmental changes.

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Darwin comes to town This one is a different perspective from that of most scientists who see cities as non-natural places. In this vision, urban areas are considered pockets of evolution due to the extreme conditions they present for species: some of them disappear while others adapt to their new circumstances.

Why are cities considered as pockets of evolution?

• Because Darwin comes to town

• Because of the extreme conditions they present for species

• Because scientists see cities as non-natural places

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Species that have developed mutations that allow them to survive in this new environment, reproduce quickly, making evolution fast.

Why is development faster in urban areas?

• Because species died in the process of adaptation

• Because species have adapted in the new environment and reproduce quickly

• Because evolution is slow

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The blackbirds of European forests were shy birds, but now, some have colonized the cities that gradually urbanized the forest. The blackbirds of the city have changed in many ways: they have shorter beaks, they do not migrate, and their breeding time is earlier, have different responses to stress, and their singing tone is different.

What type of adaptations does the city blackbird present?

• their singing tone is not different...

• they don´t have different responses to stress...

• they have shorter beaks, they do not migrate, and their breeding time is earlier...

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How does solar energy enter the ecosystems?

• Through photosynthetic organisms

• Through consumer organisms

• Through the action of decomposers

• Through predators

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Why are decomposers important in the cycle of matter?

• Because they produce oxygen for the atmosphere.

• Because they produce organic matter for the cycle.

• Because they produce carbon dioxide for the atmosphere.

• Because they produce inorganic matter for the cycle.

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Which are sources of carbon dioxide?

• Water and marine sediments

• Sediments of carbon, combustion, and burning fossil fuels

• Breathing

• Photosynthesis