Who invented mrs gren

Living things display certain characteristics that may be absent from material objects. Although some organisms are pretty much immobile they will always have some level of self-powered movement, be it their entire body or particular body parts. Movement is evolutionarily important for organisms because it improves the chances of catching food or avoiding capture for both predator and prey.

Respiration is the conversion of energy from carbohydrates and fats into energy that can be used by cells. In multi-cellular organisms, respiration is built around the breakdown of sugars with the use of oxygen. This produces carbon dioxide as a by-product. Some microorganisms , in areas where there is not very much oxygen, use other molecules, such as nitrates and iron, to help break down sugars. Sensitivity refers to the way organisms respond to their environment.

All organisms are able to sense changes in their environment and will respond accordingly. For example, barnacles will close their shells during low tide to prevent themselves from drying out, squid release ink when they feel threatened, and deer run away when they are startled by a noise. All living things have an internal environment inside their body and inside their cells. This internal environment needs to be maintained within certain conditions.

Control refers to the way organisms are able to preserve the environment inside of their cells and organs to a certain set of conditions. Maintaining the internal environment of an organism is known as homeostasis. Growth is an irreversible change in mass. It is possible because respiration provides excess energy for organisms to use to grow. Excess energy can be used for the production of new cells and tissue which inevitably leads to the growth of an individual.

Reproduction is the creation of a living thing from an existing organism. The simplest form of reproduction is the division of one cell into two. The processes behind MRS GREN are important too but to throw them all in at once early on in KS3 leads to rote learning of terms rather than a true understanding on what life is and the debate on what it is. Adding them, one by one or in small chunks, to our definition of life makes them more accessible and more meaningful. Will have a think. You are commenting using your WordPress.

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Notify me of new posts via email. Share this: Twitter Facebook. Like this: Like Loading Fair enough. Thanks for the interesting read and the responses. Leave a Reply Cancel reply Enter your comment here Sensitivity - The Euglena can sense light using an organelle called an eye spot.

Growth - The Euglena gets bigger before dividing. Reproduction - The Euglena divides to make two identical copies of itself. Excretion - The Euglena gets rid of waste with a contractile vacuole. Nutrition - The Euglena takes in nutrients from the water around it. This picture shows many muscle cells. Movement - Muscle cells can get longer and shorter. Respiration - Muscle cells get energy from the glucose in food.

Sensitivity - Muscle cells respond to electrical signals to change length. Growth - Muscle cells get bigger before dividing.