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Do you dare a Kahoot?

de maig 28, 2017

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You have reached the goal! Do you dare a Kahoot? Click on the picture!

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Glaciations

While individual continents and their species had to adapt to new climates as they drifted, they also faced a different type of climate change . The Earth has periodically shifted between very cold ice ages across the planet, to extremely hot conditions . These changes are due to various things such as slight changes to our orbit around the sun, changes in ocean currents , and the build up of greenhouse gases such as carbon dioxide, among other internal sources. No matter the cause, these sudden, or gradual, climate changes force species to adapt and evolve. Periods of extreme cold usually result in glaciation , which reduces the sea levels . Anything that lives in an aquatic biome would be affected by this type of climate change. Likewise, rapidly increasing temperatures melts ice caps and raises the sea levels. In fact, periods of extreme cold or extreme heat have often caused very quick mass extinctions of species that c...

Paleozoic era → Amphibian (395 MA)

Amphibians were the first group of vertebrates to develop limbs and to be able to leave the water to conquer the land. Even if they are seen as simple and primitive animals by most people, amphibians show a wide diversity of survival strategies which have allowed them to occupy most terrestrial and fresh-water habitats. Amphibians are animals that live part of their lives in water and part on land . They usually have soft , moist skin that is protected by a slippery layer of mucus . They also tend to live in moist places or near water to keep their bodies from drying out. There are different groups of amphibians: caecilians ; salamanders, newts , and mudpuppies ; and frogs and toad s. All amphibians: Are vertebrates (which means they have a backbone or spine ). Are ectothermic . Also known as “ cold-blooded ,” ectothermic animals cannot regulate their own body heat, so they depend on warmth from sunlight to become warm and active. If they get too hot, ...

Proterozoic Eon → Porifera and cnidaria (540 MA)

On the one hand, porifera is the name of the phylum that consists of sponges , the multicellular animals without most of the vital body organ systems such as nervous, digestive, or circulatory systems. However, it may be fair enough to wonder whether they are animals. In fact, they are classified as animals since there are no cell walls around their body cells. Additionally, poriferans are heterotrophs , made of live cells , sexually reproduce . The interest about poriferans is very high due to the lack of the vital organ systems. However, the required nutrients to sustain life of poriferans are taken inside their bodies and transported through the body using their pores. Sponges live by attached to a substrate; which means that they are sessile animals, and live in both freshwater and saltwater. However, the majority lives in the sea and few in freshwater. Sponges are found in a range of habitats including coastal zones as well as the deep-sea bottoms. Their bodies do have...

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