Natural selection could not occur without:
a. genetic variation in species
b. environmental changes
c. competition for unlimited resources
d. gradual warming of the earth

Will mark branliest. the theory of plate tectonics was developed with the contribution of scientists from many different disciplines. which of the following is a contribution from geophysicists?

When proteins are being produced by a cell, scientist say that the genes are question 2 options: activated turned off replicated deactivated

Drag each tile to the correct box. arrange the layers and faults from oldest to youngest.