Evolution
what is evolution?
A change in species over time
what carries genetic information?
DNA
what is the basic unit of life?
cell
what is a community of organisms and their environment called?
Ecosystem
what is the first step of the scientific method?
ask a question
who proposed natural selection?
Charles Darwin
what are different forms of a gene called?
Alleles
what organelle is the powerhouse of the cell?
mitochondria
what role does a producer play?
makes its own food
what is a hypothesis?
a prediction
what is natural selection?
Individuals with favorable traits survive and reproduce more
what is the probability of two heterozygous parents producing a recessive offspring?
25%
what organelle controls cell activities?
Nucleus
what is the movement of energy through an ecosystem called?
food chain/web
what variable is changed by the scientist?
independent variable
what is evidence for evolution from fossils called?
Fossil record
what is the genotype of a heterozygous organism?
one dominant and one recessive allele
what organelle performs photosynthesis?
chloroplast
what is the maximum amount of energy passed to the next trophic level?
10%
what variable is measured in a experiment?
Dependent variable
what is a speciation?
Formation of a new species
what is a punnett square used for?
predicting offspring traits
what process divides one cell into two identical cells?
mitosis
what is biodiversity?
variety of life in an ecosystem
why are repeated trials important?
increase reliability of results