4 What Basic Functions Must Animals Do To Stay Alive Photosynthesis – Food Chain

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Photosynthesis – Food Chain

What do plants and animals need to grow?

Almost all plants and animals need air, water, light and food to grow. Green plants use a complicated chemical process, called photosynthesis, to create energy for survival and growth. Since plants create their own energy, they are the first link in the food chain. Animals must drink water and eat plants or other animals to get energy. Therefore, they are present at the next step in the food chain. There are some animals, like camels, that can survive for days without drinking water. Since they live in deserts with very little water, they have adapted to the special conditions of their habitat.

How do plants get food?

Unlike animals, plants produce their own food and, apart from some carnivorous plants, do not eat other organisms. Green plants use water, nutrients and a green substance in their leaves called “chlorophyll” to make their food. Normally water and nutrients are absorbed from the soil through their roots. However, some plants have developed other methods of obtaining water and nutrients. Many plants make funnel-shaped ‘containers’ with their leaves to catch water. Carnivorous plants use their digestive juices to convert insects caught in their folding or sticky traps into nutrients.

What happens when we keep plants in the dark?

In the absence of light, plants drop their leaves and die, leaving only their roots and stems. Plants grow slowly at night and in winter. Most animals are also light dependent, although some have adapted to their dark habitats. For example, moles that live underground are almost blind because they don’t need their eyes underground. We humans also need sunlight to help produce vitamin D in our skin, which in turn is needed for building bones. We will also lose time if it is dark around us for too long.

What is photosynthesis?

The chloroplast inside the green leaves of plants is the ‘workshop’ where photosynthesis takes place. Water is supplied to the leaves by the roots and carbon dioxide is absorbed from the air through small pores on the underside of the leaf. Both of these are broken down into the elements hydrogen, carbon and oxygen with the help of chlorophyll and sunlight. Plants build ‘glucose’ (grape sugar) from these elements and oxygen is released into the atmosphere as a by-product. Photosynthesis has been the source of oxygen in the air since the origin of life on Earth.

How do camels survive long journeys in the desert?

Camels can go for about two weeks without drinking water because they can store up to 150 liters of water in their bodies. Fat is also stored in their humps and this energy reserve can sustain them for about 30 days without food. Furthermore, unlike most other mammals, camels can change their body temperature. During the night they significantly lower the body temperature so that during the day the body warms up slowly and does not sweat much. Therefore, there is no fluid loss at the beginning of the day.

What is the food chain?

In nature, there are ‘producers’ who build the biological mass and ‘consumers’ who eat. Producers are plants, which grow and create energy with the help of photosynthesis. They are eaten by a consumer, and that consumer is often eaten by another consumer. This chain of consumers is called the ‘food chain’. A short food chain is the grass-cow-man. A longer one is the kelp-herring-seal-polar bear: A flounder eats algae, a herring eats many flounder, a seal eats herrings, and a polar bear eats a seal. After all, it takes a lot of algae to feed a polar bear. When a polar bear dies, its meat is either eaten by other animals or decomposed into nutrients by bacteria. These nutrients are used again by the algae to create energy, and so the food chain is completed.

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