REED!livingthings
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| What is a cell? | the smallest unit that can perform all life processes; covered by a membrane and have DNA and cytoplasm
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| What is stimulus? | anything that causes a reaction or change in an organism or any part of an organism
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| What is homeostasis? | the maintenance of a constant internal state in a changing environment
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| What is sexual reproduction? | reproduction in which the sex cells from two parents unite, producing offspring that share traits from both parents
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| What is asexual reproduction? | reproduction that does not involve the union of sex cells and in which one parents produces offspring identical to itself
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| What is heredity? | the passing of genetic traits from parent to offspring
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| What is a metabolism? | the sum of all chemical processes that occur in an organism
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| What is a producer? | an organism that can make its own food by using energy from its surroundings
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| What is a consumer? | an organism that eats other organisms or organic matter
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| What is a decomposer? | an organism that gets energy by breaking down the remains of dead organisms or animal wastes and consuming or absorbing the nutrients
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| What is protein? | a molecule that is made up of amino acids and that is needed to build and repair body structures and regulate processes in the body structures and to regulate processes in the body
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| What is a carbohydrate? | a class of energy-giving nutrients that includes sugars, starches, and fiber; contains carbon, hydrogen, and oxygen
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| What is a lipid? | a type of biochemical that does not dissolve in water; fats and steroids are lipids
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| What is a phospholipid? | a lipid that contains phosphorus and that is a structural component in cell membranes
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| What is ATP? | adenosine triphosphate, a molecule that acts as the main energy source for cell processes
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| What is nucleic acid? | a molecule made up of subunits called nucleotides
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| What are all living things made up of? | cells
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| What covers a cell? | a cell membrane
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| What does a cell contain? | all of the materials necessary for life
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| How are the contents of a cell protected from the cell's environment? | the cell membrane that surrounds a cell separates the contents from the environment
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| In an organism containing many cells, how is the work performed? | different kinds of cells perform specialized functions
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| What are 3 examples of stimuli? | chemicals, gravity, and light
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| When an organism's outside environment changes, how does the organism maintain stable internal conditions? | through homeostasis
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| Why must an organism maintain stable internal conditions? | chemical reactions keep organisms alive, and these reactions only take place when conditions are exactly right
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| What is your body trying to do when you are sweating or shivering? | to return itself to normal
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| How do some animals control their body temperatures? | by moving from one environment to another
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| When do two parents produce offspring that share their characteristics? | in sexual reproduction
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| When does a single parent produce offspring identical to it? | in asexual reproduction
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| What do most single-celled organisms reproduce through? | asexual reproduction
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| What do most animals and plants reproduce through? | sexual reproduction
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| What does DNA do? | controls the structure and function of cells
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| What do organisms pass on to their offspring? | copies of their DNA
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| What are 3 examples of activities carried out by all organisms? | building cells, making food, and breaking down food
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| How does a single-celled organism grow? | it gets larger and divides in to new organisms
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| How do organisms with many cells grow? | the number of their cells get larger and the organism gets bigger
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| In addition to getting larger, what other things might happen as living things grow? | development or change
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| What are the four basic needs of every organism? | water, air, food, and a place to live
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| How much of most living thing's cells are water? | 70%
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| What do most chemical reactions involved in metabolism require? | water
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| About how long can humans survive without water? | 3 days
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| Air is a mixture of what gasses? | oxygen and carbon dioxide
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| What is a chemical process in which most living things use oxygen? | releasing energy from food
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| What types of air do green plants, algae, and some bacteria need? | carbon dioxide and oxygen
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| When do green organisms convert the energy in sunlight to energy stored in food? | photosynthesis
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| What do organisms need in the place where they live? | all the things necessary for life
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| How does the limited amount of space on Earth affect organisms? | organisms need to compete with each other for necessities
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| What are two things food gives organisms? | energy and raw materials needed to carry on life processes
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| What are two ways organisms use nutrients from food? | to replace cells and build body parts
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| What do all organisms do to food in order to use the nutrients in it? | break down food
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| What are nutrients made up of? | molecules
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| What is a molecule? | a substance created when two or more atoms combine
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| What is a compound? | molecules made up of different kinds of atoms
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| What are the five building blocks of cells? | protein, carbohydrates, lipids, nucleic acid, and ATP
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| What are enzymes? | proteins that speed up chemical reactions
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| What is hemoglobin? | a protein found in red blood cells that attaches to oxygen
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| What is protein? | a nutrient involved in almost all life processes
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| What are amino acids? | compounds that make up proteins
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| How do cells use carbohydrates? | cells break down carbohydrates and release the energy stored in them
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| What is a simple carbohydrate? | a carbohydrate made of one sugar molecule or a few linked sugar molecules
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| What is a complex carbohydrate? | a carbohydrate made of hundreds of molecules linked together
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| What is an example of a simple carbohydrate? | table sugar
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| What is an example of a complex carbohydrate? | potatoes
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| What are the molecules that form most of the cell membrane? | phospholipids
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| Where can an organism get energy once it has used up most of its carbohydrates? | from fats and oils
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| What is a difference between fats and oils? | at room temperature, fats are solid and oils are liquid
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| What is the major energy-carrying molecule of the cell? | ATP
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| How do cells get energy from carbohydrates and lipids? | the energy from carbohydrates and lipids a transferred to ATP, which then provides fuel for cellular activities
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| Why are nucleic acids called the blueprints of life? | they have all the information needed for a cell to make proteins
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| Why must organisms have food? | food is a source of energy
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| What is a change in an organism's environment that affects the organism's activities? | stimulus
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| What do organisms store energy in? | lipids
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| What is the molecule that contains the information about how to make proteins? | ATP
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| What are the subunits of nucleic acids? | nucleotides
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| What is the difference between asexual and sexual reproduction? | sexual reproduction requires the union of sex cells, but asexual reproduction does not
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| Why must living things have air? | most living things use oxygen in the chemical processes that releases energy
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| How do some animals maintain homeostasis? | they move from one environment to another
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| What are four chemical activities in living things that require energy? | making food, building cells, breaking down food, and moving materials in and out of cells
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| What process do plants use to make food? | photosynthesis
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| What is the difference between simple and complex carbohydrates? | simple carbohydrates are made of one sugar molecule, complex carbohydrates are made of many sugar molecules linked together
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| What is one difference between fats and oils? | at room temperature, most fats are solid and most oils are liquid
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