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58 terms

Biology 1.3, 2.1, & 2.2 Quiz

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Biology
the study of "life" & science of living things
Cell
the basic unit of life
Unicellular organisms
organisms that are made of only 1 cell (ex: bacteria)
Multicellular Organisms
organisms that begin as one cell but as adults are made of many cells
Made of Cells, reproduce, based on a universal genetic code, grow & develop, obtain & use materials& use energy, respond to their environment, maintain a stable internal environment, as a group change over time
8 characteristics of ALL LIVING THINGS
Sexual Reproduction
this type of reproduction combines genetic material from 2 parents (seen in animals & plants) sperm+egg=baby
Asexual Reproduction
this type of reproduction makes a new organism using the genetic material from only 1 parent (seen in bacteria, plants, & some animals)
DNA
heredity material, aka _________
Gene
a segment of DNA with instructions for one protein
Single Celled Organisms
these types of organisms grow by increasing in size
Multicellular Organisms
these types of organisms grow bigger by increasing cell size AND increasing cell number; they don't just contain MANY cells, but many different kinds of cells w/ different functions
DNA
all cells have the same _________
Stem cells
type of cells that can become any kind of cell
Building materials & energy
to grow & develop, organisms need a constant supply of...
Autotrophs
another name for plants
Autotrophs
__________ use energy from sunlight or chemicals to make their own food
Heterotrophs
another name for animals
Heterotrophs
_________ get their energy by consuming other organisms
Metabolism
the combination of all the chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes
Homeostasis
a cell works to keep conditions inside the cell constant is ____________; involves internal feedback mechanisms (shiver to warm up/ sweat to cool down)
Stimulus
a signal to which an organism responds
Evolution
as a group change over time = ____________; allows for survival of species in a changing world
DNA
the genetic molecule common to all living things
Evolution
the internal process of __________ enables living things to survive to changing conditions
Stimuli
Living things are capable of responding to different types of _________
Sexual & Asexual
The continuation of life depends of both ___________ & ____________
Metabolism
the combination of chemical reactions that make up an organism's ___________ help to organize raw materials into living matter
Cellular basis of life
big idea; living things are made of cells
Information & Heredity
big idea; living things are based on a universal genetic code (DNA)
Matter & Energy
big idea; life requires matter that provides raw materials, nutrients, & energy
Growth, development, & reproduction
big idea; all living things reproduce
Homeostasis
big idea; living things maintain a relatively stable internal environment
Structure & Function
big idea; each major group of organisms has evolved structures that make particular functions possible
Evolution
big idea; taken as a group, living things evolve
Unity & Diversity of Life
big idea; all living things are fundamentally similar at the molecular level
Interdependence in Nature
big idea; all forms of life on Earth are connected into a biosphere--a living planet
Science as a way of knowing
big idea; job of science is to use observations, questions, & experiments to explain the natural world
Metric System
the system of measurement that most scientists use when collecting data & doing experiments
Atom
a chemical element is a pure substance that consists entirely of one type of ________
Isotopes
atoms of the same element that differ in the number of neutrons they contain
Electrons
an atom is make up of protons, neutrons, & _________
Chemical Compound
a substance formed by the chemical combination of 2 or more elements in definite proportions
Ionic Bond
type of bond formed when one or more electrons are transferred from one atom to another
Covalent Bond
type of bond formed when electrons are shared by atoms
Chemical bonds
metabolism breaks down___________ ________
Polar
water is a _________ molecule
Cohesion
hydrogen bonds are an example of ___________
High
Covalent bonds give water a _____ heat capacity
Weaker
a hydrogen bond is __________ than a covalent bond
Cohesion
attraction between molecules of the same substance
Adhesion
a force of attraction between different kinds of molecules
Mixture
physical combination of 2 or more substances
Solute
substance that is dissolved
Solvent
the substance doing the dissolving
Suspension
mixture of water & non dissolved substance
Solution
all components are evenly distributed throughout the __________
Concentration of H+ ions
what does the pH scale measure?
Remove H+ ions
how would you buffer a solution that has a pH of 12?