Imagine that these finches did all live on the same island. they were able to co-exist because they survived on different foods. imagine a change in climate, a drought, and certain plants were no longer able to survive on the island. seeds that were a food resource become scarce. you might expect all but one of these things to happen among the finch populations. that is
a) not all of the finches are able to survive.
b) some finches fly to nearby islands to find food.
c) beak shapes changed so finches were able to eat other food resources.
d) finches with beaks adapted for insect catching are more likely to survive.

i'm not sure

explanation:

i'll try whatever you got

alkaline metals are lithium, sodium, rubidium, potassium, cesium and francium.

alkali metals have electronegativity from 0.7 to 1, lowest in periodic table of elements, which means that alkali metals (i group in periodic table) has positive oxidation number in compounds.

electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

alkaline metals (far left in main group) have lowest ionizations energy and easy remove valence electrons,

for example, potassium is the alkali metal and has a single valence electron in the outer electron shell.

electron configuration of potassium is: ₁₉k 1s²2s²2p⁶3s²3p⁶4s¹.

they can not exist alone in nature, because they are very reactive.

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.