In which of these situations would light slow down?

Plz ! for many generations farmers in north america have been choosing to cross corn plants with large ears of corn each year this results in the new generation of plants also growing large ears of corn. what is the technique called? a. selective breeding. b. natural selection. c. mitosis. d. asexual budding.

What percentage of light hits earth's surface directly?

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.