Scientific Method
This is an educated guess written in “If…then” form.
hypothesis
The “powerhouse of the cell.”
mitochondria
The shape of the DNA molecule discovered with help from Watson, Crick, and Rosalind Franklin.
double helix
Organisms that make their own food are called
producers/autotrophs
The scientist who developed the theory of natural selection.
Charles Darwin
The process in which plants use sunlight to make glucose.
photosynthesis
The variable that is purposely changed in an experiment.
What is the independent variable
This organelle stores DNA and acts as the command center of the cell.
nucleus
These nitrogen bases pair together in DNA: A with ___ and C with ___.
thymine and guanine
A relationship in which both organisms benefit is called
mutualism
This system gives organisms a two-part scientific name.
binomial nomenclature
Viruses are considered this because they cannot perform life functions without a host.
nonliving
These are factors kept the same during an experiment.
constants
Plant cells have these two structures that animal cells do not.
cell wall and chloroplasts
A genotype with two different alleles.
heterozygous
The first organisms to appear during succession, such as lichens and mosses are called
pioneer species
Structures with similar bone arrangements that suggest common ancestry.
homologous structures
The type of cell division that produces gametes.
meiosis
The process of organizing data using tables and graphs.
interpreting and analyzing data
This process moves water across a selectively permeable membrane.
osmosis
Gregor Mendel is known by this title.
Father of Modern Genetics
A nonliving part of an ecosystem
abiotic factor
According to relative dating, fossils found deeper underground are this.
older
This cycle includes evaporation, condensation, and precipitation.
water cycle
This type of experiment tests a hypothesis while comparing results to a baseline.
controlled experiment
This transport process requires energy and moves molecules from low to high concentration.
active transport
A man with genotype Dd marries a woman with genotype dd. This percentage of their children will have dimples.
50%
This type of succession occurs after a fire destroys an area
secondary succession
The most specific evidence scientists use to determine common ancestry.
DNA sequence comparison
A mutation caused when nucleotide bases are added or removed, shifting the DNA sequence.
insertion or deletion mutation