An introduction to life on earth Crossword

the smallest particle of an element that retains the properties of that element
smallest unit of life
2 or more populations of different species living and interacting in the same area
makes up all matter of Earth and is unique, it is also a substance which cannot be broken down.
atoms combined in specific ways to form assemblies
a structure usually composed of several tissue types that forma functional unit
complex molecules that contain both carbon and hydrogen which makes up living things
an individual living thing
2 or more organs working together in the execution of a specific bodily functions
a group of organisms of the same species within an area
organisms of the same type that are capable of breeding with one another
a group of similar cells that perform a specific function
the decision about the validity of a hypothesis on the basis of experimental evidence
the portion of an experiment in which all possible variables are held constant
the testing of a hypothesis by carefully controlled observations
a supposition based on previous observation that is offered as an explanation for observed phenomena and is used as the basis for further observation or experiment
all events can be traced to natural causes that are potentially within our ability to comprehend
the noting of scientific phenomena
a guess based on facts or evidence
define the problem or issue you wish to resolve
observation, question, hypothesis, prediction, experiment, conclusion
a factor in a scientific experiment that is deliberately altered in order to test a hypothesis
the process of generating hypotheses about how specific experiments or observations will turn out
the process of creating a generalization, coupled with an absence of contradicting evidence
a general explanation of natural phenomenon developed through extensive and reproducible observations, more general and reliable than hypothesis
structures, physiology processes, and behaviors that aid in the survival and reproduction of that particular environment
the diversity of species and the interaction that sustain them
contains an organism's DNA
molecule that contain hereditary info of all known forms of life
states modern organisms descended, with modification, from preexisting life forms
a change in the base sequence of DNA in a gene
process in which organisms with specific traits that help them cope with the rigors of their environment reproduce more successfully than others who lack those traits
states that the cell is the basis unit of life
the material contained within the plasma membrane
units of heredity that provide the information needed to control the life of the cell
small structures that are specialized to carry out specific functions
the outer membrane of a cell
needed to stay alive and function effectively.
self feeder, normally a photosynthetic organism, a producer
the capacity to do work