H/600/5950 The Study of Living Systems Unit 4 H/600/5950 Issue Date: Completion date: Name: H/600/5950 1.1. Identify major organelles of Eukaryotic cells Define what a Eukarytoic cell is! (It’s not as scary as you think!) Now look at some cells under a microscope! H/600/5950 Label the animal cell and the plant cell below; you can either use a book or the internet to help you. H/600/5950 Add some colour to the diagram as well; it will help you to remember the different parts. H/600/5950 Your body and that of other animals and plants are made up of a number of different types of cells. For each of the cells below find out what they are and what the cells do! (Again a good biology book will help!) H/600/5950 H/600/5950 1.2 Describe the role of the nervous system in Homeostasis. Give a short definition on what homeostasis is. Now a give a short definition on what the nervous system is! This strange diagram shows how the human nervous system is connected. H/600/5950 We now know what homeostasis is and what the nervous system is. Now combine that knowledge and work out what the body does when it’s…. TOO HOT TOO COLD TOO BRIGHT H/600/5950 1.3 Describe the role of the endocrine system in homeostasis The nervous system is not the only system working in homeostasis. The endocrine system is also involved. So what is the Endocrine system? (You knew that question was coming) Different parts of the endocrine system do different things; on the next page is a picture of the system. Label the diagram with the correct glands. H/600/5950 H/600/5950 Now pick one of these glands, draw a detailed diagram of it and describe what it does. H/600/5950 2. Know the interactions within environments 2.1 Describe components of an ecosystem Find out what an ecosystem is and draw a poster sized one, to go on the wall! (Bigger the better) This is an example of one. On the poster you will have to say what habitat it is, the name of the animals, and what eats what. H/600/5950 Now that you have made your poster you can write down the definitions of these words. Habitat Population Community H/600/5950 Species Food web Food chain Evolution H/600/5950 2.2 Explain adaptations in ecosystems Different environments (habitats) mean that animals and plants have to find ways in which it is best to survive. For each of these environments, find a picture of an animal or plant and explain how it has adapted to that environment. (Use power point?) Desert Deep sea Mountains H/600/5950 Not only are there pressures from the environment that changes the shape of animals and plants, but also the shapes of animals that they hunt and are hunted by. Find a picture of a living predator and an extinct one and show why they were good at hunting! For example, I choice; A colossal squid (It’s fast, has big eyes to see its prey and can change its colour, tentacles to catch its prey) Sabre tooth tiger (Strong and deadly sharp teeth, with good eye sight, speed, good sense of smell) H/600/5950 2.3 Describe the effects of humans on ecosystems. Humans have been affecting the world’s environments for thousands of years and we still are. In the table below put the positive and negative outcomes of these different man-made effects on the environment. Positive effect Negative effect Carbon emissions Pesticides/insecticides Acid rain Human population Pick one of these man-made effects on the environment and draw/power point a poster to show these effects. H/600/5950 3. Know the role of genes in inheritance and variation. 3.1 Describe the role of genes in inheritance We are what we are because of our parents! Our hair colour and a thousand other attributes are down to the information passed down to us though our genes. All the information that makes you is in every cell of your body (well nearly all! Extra points if you can work which don’t) label the diagram above. H/600/5950 Describe what is meant by a dominate gene and recessive gene. H/600/5950 A number of different diseases are genetic. These include Huntingdon’s chorea, haemophilia and cystic fibrosis. Show on each diagram the symptoms for each disease. Huntingdon’s chorea H/600/5950 Haemophilia Cystic Fibrosis H/600/5950 3.2 Describe the role of genes in variation People from around the world come in all shapes and sizes. This is because the environment in which they evolved meant their bodies had to adapt. Describe below why skin colour is different depending on which part of the world our ancestors came from Also find out how and why we have different eye and hair colour!
