Natural selection uses the……….as the raw materials for the better survivors.
a) variations
b) mutations
c) competition
d) both a and b
Which of the following always exerts a selective influence and molds the species to fit in its changed environment?
a) fixity of species
b) special creation
c) natural selection
d) struggle for existence
Explanation: Natural selection is a mechanism of evolution. Organisms that are more adapted to their environment are more likely to survive and pass on the genes that aided their success.
Which of the following is concerned with changes in gene frequencies in small populations by chance?
a) genetic drift
b) special creation
c) natural selection
d) struggle for existence
Explanation: the gene frequencies will continue to fluctuate until a new mutation is either lost or is fixed
An inherited characteristic that increases an organism ability to
survive and reproduce in its specific environment is called……..
a) radiation
b) speciation
c) adaptation
d) extinction
Explanation: An example of a structural adaptation is the way some plants have adapted to life in dry, hot deserts.
The total of all the allele in a population is called……..
a) gene pool
b) genotype
c) phenotype
d) gene mutation
Reproductive isolation is regarded as one the most important factors of ………
a) evolution
b) inheritance
c) reproduction
d) selection
