Science - Bacteria.

 Hello fellow readers,

Today in Science we are talking about Bacteria. 

WALT 

To look at different types of bacteria.

Bacteria is shapes like a rod or spiral, Bacteria is also inside of your cells and makes up 90% of it. Bacteria is good and bad because there is 90% of bacteria in your body right now and if you didn't have it in your body right now then your body wont adapt properly.

What is bacteria?

1. Feeding:

Most bacteria's are consumers, this means they cant make their own food in sunlight, which means they have to feed by using other living things. Bacteria doesn't have a digestive system like other things. Bacteria will wait for things to decompose before they eat it. They start to eat when it is more rotten.

2. Reproduction

Bacteria do not have any gender. One bacteria does not need another bacteria to reproduce. The name for reproduction is Misosis. To make other bacteria they split to reproduce. They can split every 15-20 minutes. The smaller cells are named daughters which means that they will become identical. When they have reached a certain  size they have to split. Bacteria need's to split in order to survive. 

3. Execration

The food they eat is important to help them live, because it gives them energy, and helps them grow and repair damaged parts. There are also waste products of their digestion – just like in you. These wastes must be excreted, or got rid of, so that the bacteria do not poison themselves. They pass out through the bacterium’s cell membrane, and into whatever they are living on or in. Just like in all living things, two of these wastes are water, and carbon dioxide, which the bacteria release. They also produce substances which may be poisonous if they are on or in living things. We call these poisonous substances toxins. Toxins give you the symptoms of diseases caused by bacteria. Bacteria which feed on living things and cause diseases, are called Pathogenic bacteria, and are harmful to you.

4. Breathing 

All living things need oxygen so that their cells can convert food into energy. This process is called respiration. Bacteria are able to carry out both aerobic and anaerobic respiration. Aerobic respiration is when there is plenty of oxygen. Anaerobic respiration occurs when the supply of oxygen is very limited or even non-existent. The waste products of aerobic respiration are carbon dioxide which is breathed out, water, and heat. This is why when bacteria start to decompose substances like a dead body, or in a compost heap, or when you have a bacterial infection, the temperature goes up. Bacteria can breathe even if there is no oxygen. When bacteria make things right they produce heat.