Endangered and Extinct Animals

What are the reasons for the extinction of plants and animals ?

• Plants and animals become extinct due to many reasons

• Change in habitat, food supplies and different adaptations contribute to the extinction of a species.

• Change in habitat, food supplies and different adaptations contribute to the extinction of a species.

• This happens for any type of organisms if there are only a few remaining of their kind

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What are the reasons for the extinction of animals due to human activities ?

• Deforestation

• River pollution leading to increased toxicity of water

• Excessive fishing

• Hunting

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Which of the following animals is not extinct?

• Dodo

• Woolly Mammoth

• Tasmanian Tiger

• Giraffe

Woolly Mammoth is similar to:

• Dodo

• Jaekelopterus

• Scorpion

• Elephant

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What are endangered animals?

• Animals that are in danger of becoming extinct

• Animals that are in danger of becoming hungry

• Animals that are in danger of becoming pretty

• Animals that are in danger of becoming ugly

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What does extinct mean?

• All the animals died.

• Only a few animals left.

• Dangerous animals.

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Paleontologists have found hundreds of fossils of tropical plants in cool, dry areas of North America. Which is most likely indicated by fossil discoveries like these?

• Glacial movement carried fossils to different places

• Some tropical plants can grow in moderate climates.

• The climate in different areas on Earth has changed over time.

• Ancient people carried plants with them as they traveled to new locations.

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The diagram shows the front limbs of four different members of the horse family, based on the fossil record. They are arranged from the oldest to the most recent. Which best describes how the front limbs of horses have changed over time?

• They have gained additional toes.

• The bones have become stronger.

•   The toes have reduced in number.

• The bones have become shorter.

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Scientists studied the teeth on the fossils of an ancient fish. The oldest fossils indicate the fish mostly ate plankton. The teeth on more recent fossils indicate the fish began to eat larger plants. Which hypothesis does this observation best support?

• Over time, the fish grew considerably in size.

• Over time, the fish occupied different ecological niches

• Over time, the fish changed from living in salt water to living in fresh water.

• Over time, the fish changed from a primary consumer to a secondary consumer.

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Scientists have discovered a fossil skeleton of a whale-like creature that lived in the early Eocene epoch. The skeleton shows an organism with large fore and hind limbs with distinct toes. Fossil skeletons of closely related species from later periods show organisms lacking hind limbs.

Which conclusion does this observation best support?

• Ancestors of whales may once have been able to walk

• Ancestors of whales had fewer bones than modern whales.

• Whales and their ancestors have always been ocean dwellers.

• Whales and their ancestors have been the largest living animals.

   

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