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biology chapter. 1

characteristics & classification of living organisms
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jiwonljw
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Last updated: July 17, 2024
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First submittedJuly 17, 2024
Times taken12
Average score4.9%
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questions
answer
what is an organism
a living thing
what is movement
an action by an organism or part of an organism causing a change of position or place
what is respiration
the chemical reactions in cells that break down nutrient molecules and release energy for metabolism
what is metabolism
the chemical reactions that take place in living organisms
what is sensitivity
the ability to detect and respond to changes in the internal or external environment
what is growth
a permanent increase in size and dry mass
what is dry mass
the mass of an organism after it has been killed and all water removed from it
what is reproduction
the processes that make more of the same kind of organism
what is excretion
the removal of waste products of metabolism and substances in excess of requirements
what is nutrition
taking in materials for energy, growth, and development
what is a common ancestor
a species that lived in the past and is thought to have given rise to several different species alive today
what is a species
a group of organisms that can reproduce to produce fertile offspring
what is fertile
able to reproduce
what is infertile
not able to reproduce
what is the binomial system
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
what is a genus
a group of species that share similar features and a common ancestor
what is a dichotomous key
a way of identifying an organism by working through pairs of statements that lead you to its name
what is a kingdom
one of the major groups into which all organisms are classified
organic substances
substances that are made by living things
what is chlorophyll
a green pigment that absorbs energy from light to combine carbon dioxide with water and make glucose
what is cellulose
a carbohydrate that forms long fibers and makes up the cell walls of plants
questions
answer
what is a fungus
an organism whose cells have cell walls but does not photosynthesize
what is a prokaryote
an organism whose cells do not have a nucleus
what is a protoctist
a single celled organism or one with several very similar cells
what is a hyphae
microscopic threads made of cells linked in a long line that make up the body of a fungus
what are decomposers
organisms that break down organic substances outside their bodies, releasing nutrients from them that other organisms can use
what are spores
very small groups of cells surrounded by a protective wall used in reproduction
what is multicellular
made of many cells
what is unicellular
made of a single cell
what is metamorphosis
changing from a larva with one body to an adult with a different body form
what is a pinna
a flap on the outside of the body that directs sound into the ear
what is a placenta
an organ that connects the growing fetus to its mother
what are mammary glands
organs found only in mammals which produce milk to feed young
what is a diaphragm
a muscle that separates the chest cavity from the abdominal cavity in mammals to help with breathing
what is an arthropod
an animal with jointed legs but no backbone
what is an exoskeleton
a supportive structure on the outside of the body
what does terrestrial mean
living on land
what does vestigial mean
description of a structure that has evolved to become so small that it is no longer useful
what does aquatic mean
living on water
what are dicotyledons
plants with two cotyledons in their seeds
what are monocotyledons
plants with one cotyledon in their seeds
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