A.

1 - native

3 - MG

2, 4 - unfolded

B.

1 - native

3, 4 - MG

2 - unfolded

TLS Online TPP Program

#Id: 7039

#XL - T Zoology

Gradualism is Darwin’s proposition that the differences between even radically different organisms have evolved by small steps through intermediate forms, not by leaps

TLS Online TPP Program

#Id: 7040

#XL - T Zoology

Populational change is Darwin’s hypothesis that evolution occurs by changes in the proportions (frequencies) of different variant kinds of individuals within a population.

TLS Online TPP Program

#Id: 7041

#XL - T Zoology

 Natural selection was Darwin’s brilliant hypothesis, independently conceived by Wallace, that accounts for adaptations, features that appear “designed” to fit organisms to their environment.

TLS Online TPP Program

#Id: 7042

#XL - T Zoology

TLS Online TPP Program

#Id: 7043

#XL - T Zoology

Where, though, do these hereditary variations come from? This was the great gap in Darwin’s theory, and he never filled it.

TLS Online TPP Program

#Id: 7044

#XL - T Zoology

Orthogenesis - “Straight-line evolution,” held that the variation that arises is directed toward fixed goals.