Natural selection provides the following mechanism for evolution: Some
variation in heritable characteristics exists within every species, some
of these characteristics give individuals an advantage over others in surviving
and reproducing, and the advantaged offspring, in turn, are more likely
than others to survive and reproduce. The proportion of individuals that
have advantageous characteristics will increase.
NSES Content Standard C
Life Science: Diversity and adaptations of organisms Grades 5-8, page 158 Biological evolution accounts for the diversity of species developed through gradual processes over many generations. Species acquire many of their unique characteristics through biological adaptation, which involves the selection of naturally occurring variations in populations. Biological adaptations include changes in structures, behaviors, or physiology that enhance survival and reproductive success in a particular environment. NSES Content Standard C
NSES Content Standard C
|