In 1859, Charles Darwin proposed his theory of evolution based on natural selection. What
observation about the natural world does this
theory explain?
O how the fossil record was formed
O how species change over time
how a species ahvays retains its characteristics
how catastrophic events lead to extinctions

Can create a hboth of these instruments can measure wind speed. doppler radar and psychrometer anemometer and hygrometer doppler radar and anemometer radiosonde and psychrometer

What do isotopes of uranium have the same number of? what do they have a different number of? a) same number of protons; different number of electrons b) same number of protons; different number of neutrons c) same number of electrons; different number of protons d) same number of neutrons; different number of protons

Look at the photo of the leaf, which term best describes this leaf ? a-simple.b-parallel.c-lobed.d-tooth.