Photosynthesis is the process by which organisms that contain the pigment chlorophyll convert light energy into chemical energy which can be stored in the molecular bonds of organic molecules (e.g., sugars). Photosynthesis powers almost all trophic chains and food webs on the Earth.

Inside the cell, each sugar molecule is broken down through a complex series of chemical reactions. As chemical energy is released from the bonds in the monosaccharide, it is harnessed to synthesize high-energy adenosine triphosphate (ATP) molecules. ATP is the primary energy currency of all cells.

Autotrophs are known as producers because they are able to make their own food from raw materials and energy. Examples include plants, algae, and some types of bacteria. Heterotrophs are known as consumers because they consume producers or other consumers. Dogs, birds, fish, and humans are all examples of heterotrophs.

The term autotroph was coined by the German botanist Albert Bernhard Frank in 1892. It stems from the ancient Greek word τροφή (trophḗ), meaning “nourishment” or “food”. The first autotrophic organism developed about 2 billion years ago. Photoautotrophs evolved from heterotrophic bacteria by developing photosynthesis.

Plants are the most familiar type of autotroph, but there are many different kinds of autotrophic organisms. Algae, which live in water and whose larger forms are known as seaweed, is autotrophic. Phytoplankton, tiny organisms that live in the ocean, are autotrophs. Some types of bacteria are autotrophs.

The two major groups are the single-celled (e.g. bacteria, archaea, and protists) and the multicellular (animals and plants). Organisms can also be classified according to their subcellular structures. Those with a well-defined nucleus are referred to as eukaryotes whereas those without are called prokaryotes.

Carbon is primarily fixed through photosynthesis, but some organisms use a process called chemosynthesis in the absence of sunlight. Heterotrophs are not themselves capable of carbon fixation but are able to grow by consuming the carbon fixed by autotrophs or other heterotrophs.

Humans cannot make their own food because we do not have things that plants have such as chlorophyll. The carbon dioxide and water are transformed into a totally new substance that contains energy — it is food in the form of sugar.

Chlorophyll is a pigment that gives plants their green color, and it helps plants create their own food through photosynthesis.

The simple answer is that although plants absorb almost all the photons in the red and blue regions of the light spectrum, they absorb only about 90% of the green photons. Plants are green because the small amount of light they reflect is that color.

Green plants are known as autotrophs. Because green plant can make their own food with the help of sunlight, water, carbon dioxide and chlorophyll.

bamboo

Phragmites australis

Green plants are called producers because they make their own food out of water and carbon dioxide in the presence of sunlight.

Dairy products, milk products or lacticinia are a type of food produced from or containing the milk of mammals, primarily cattle, water buffaloes, goats, sheep, camels, and humans. Dairy products include food items such as yogurt, cheese, and butter.

A food chain only follows just one path as animals find food. eg: A hawk eats a snake, which has eaten a frog, which has eaten a grasshopper, which has eaten grass. A food web shows the many different paths plants and animals are connected. eg: A hawk might also eat a mouse, a squirrel, a frog or some other animal.

We need food because food gives us energy. The food we eat gives our body essential nutrients to help us grow and heal when we are injured or are ill. Thus food keeps us healthy and provides us with essential nutrients to fight diseases and maintain body functions.

Food provides the energy that our bodies need to keep going. Without food, a person would typically survive for a few weeks. Without water, they could only live for a few days. In developed countries, most people have access to enough food that they would not consider ‘to stay alive’ as one of their reasons for eating.

Omnivores are organisms which consume both plants and animals. Humans eat plants in the form of different vegetables. They also eat the flesh of animals and fish products. Hence, humans are said to be omnivorous.

A food is something that provides nutrients. energy for activity, growth, and all functions of the body such as breathing, digesting food, and keeping warm; materials for the growth and repair of the body, and for keeping the immune system healthy.

Food provides nutrients. Nutrients provide energy for body activities and all functions of the body. Energy is used in different processes of a living organism like breathing, digesting food, etc. Food is also used for “growth and repair” of the different body parts.

The following are some of the most healthful:

• Broccoli. Broccoli provides good amounts of fiber, calcium, potassium, folate, and phytonutrients.
• Apples. Apples are an excellent source of antioxidants, which combat free radicals.
• Kale.
• Blueberries.
• Avocados.
• Leafy green vegetables.
• Sweet potatoes.

Eating a balanced diet This means eating a wide variety of foods in the right proportions, and consuming the right amount of food and drink to achieve and maintain a healthy body weight.