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questions
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answer
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what is an organism
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a living thing
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what is movement
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an action by an organism or part of an organism causing a change of position or place
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what is respiration
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the chemical reactions in cells that break down nutrient molecules and release energy for metabolism
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what is metabolism
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the chemical reactions that take place in living organisms
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what is sensitivity
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the ability to detect and respond to changes in the internal or external environment
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what is growth
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a permanent increase in size and dry mass
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what is dry mass
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the mass of an organism after it has been killed and all water removed from it
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what is reproduction
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the processes that make more of the same kind of organism
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what is excretion
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the removal of waste products of metabolism and substances in excess of requirements
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what is nutrition
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taking in materials for energy, growth, and development
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what is a common ancestor
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a species that lived in the past and is thought to have given rise to several different species alive today
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what is a species
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a group of organisms that can reproduce to produce fertile offspring
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what is fertile
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able to reproduce
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what is infertile
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not able to reproduce
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what is the binomial system
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a system of naming species that is internationally agreed in which the scientific name is made up of two parts showing the genus and the species
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what is a genus
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a group of species that share similar features and a common ancestor
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what is a dichotomous key
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a way of identifying an organism by working through pairs of statements that lead you to its name
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what is a kingdom
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one of the major groups into which all organisms are classified
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organic substances
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substances that are made by living things
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what is chlorophyll
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a green pigment that absorbs energy from light to combine carbon dioxide with water and make glucose
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what is cellulose
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a carbohydrate that forms long fibers and makes up the cell walls of plants
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what is a fungus
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an organism whose cells have cell walls but does not photosynthesize
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what is a prokaryote
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an organism whose cells do not have a nucleus
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what is a protoctist
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a single celled organism or one with several very similar cells
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what is a hyphae
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microscopic threads made of cells linked in a long line that make up the body of a fungus
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what are decomposers
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organisms that break down organic substances outside their bodies, releasing nutrients from them that other organisms can use
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what are spores
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very small groups of cells surrounded by a protective wall used in reproduction
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what is multicellular
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made of many cells
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what is unicellular
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made of a single cell
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what is metamorphosis
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changing from a larva with one body to an adult with a different body form
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what is a pinna
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a flap on the outside of the body that directs sound into the ear
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what is a placenta
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an organ that connects the growing fetus to its mother
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what are mammary glands
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organs found only in mammals which produce milk to feed young
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what is a diaphragm
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a muscle that separates the chest cavity from the abdominal cavity in mammals to help with breathing
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what is an arthropod
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an animal with jointed legs but no backbone
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what is an exoskeleton
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a supportive structure on the outside of the body
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what does terrestrial mean
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living on land
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what does vestigial mean
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description of a structure that has evolved to become so small that it is no longer useful
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what does aquatic mean
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living on water
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what are dicotyledons
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plants with two cotyledons in their seeds
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what are monocotyledons
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plants with one cotyledon in their seeds
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