Aim: How can we describe how living things obtain nutrition?

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Presentation transcript:

Aim: How can we describe how living things obtain nutrition? Do now: What are the three types of macromolecules we eat? Besides these three food types, what else do you think we need to eat to survive?

Three macromolecules we eat… 1. Carbohydrates Sugar, bread, fruits, vegetables 2. Lipids Fats, oils 3. Proteins Meat, fish, eggs, nuts & beans

What else do we need? 1. Vitamins 2. Minerals 3. WATER!!!

Nutrition: How an organism gets food (nutrients, organic compounds) and makes it available to the cells. Nutrients: Are the useful portion of food: -sugars -amino acids -fat -starch Organic Compounds = FOOD!!!!!!

2 TYPES OF NUTRITION 1. Autotrophic nutrition – Auto (self) trophic (refers to feeding and nutrition) “Self feeding.” -Organisms that make their own organic compounds ex. Photosynthesis Chemosynthesis

a. Photosynthesis Photo (light) synthesis (creating, making) -Light is the source of energy for the production of food. -“Who?” ex. Plants

Autotrophs:

b. Chemosynthesis – Chemo (chemical) synthesis (creating, making) -Chemical activity is the source of energy for the production of organic compounds. Who? -organisms in environments that do not rely on the sun to make food. ex. Deep sea organisms

Photosynthesis Chemosynthesis

Chemosynthetic nutrition - Deep sea tube worms and arthropod

So far….. Nutrition: Autotrophic: a. photosynthesis b. chemosynthesis Autotrophs – Organisms that can make their own food by photosynthesis or chemosynthesis.

2. Heterotrophic nutrition – Hetero: other trophic: (refers to feeding and nutrition) “Fed by others.” - Heterotrophs: Organisms that eat organic compounds made by others. ex. Animals or animal-like protists called protozoa: amoeba, paramecium. Proto (first) zoa (animal, zoo)

Examples of heterotrophs paramecium

More heterotrophs….

Obviously, a _________________ . heterotroph!

Are you a heterotroph? Why? Summary: 2 types of nutrition on Earth: 1. Autotrophic - photosynthesis - chemosynthesis 2. Heterotrophic

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