HELP ME I DON”T UNDERSTAND AND IT”S MULTIPLCE CHOICE PLZZZ

If a terrestrial ecosystem has a net primary production of 3000 J/m2 *yr and an Ra of 2000, what is the gross primary production for this ecosystem?

A. 100
B. 500
C. 1000
D. 5000

4the indian leaf butterfly has traits that allow it to resemble a leaf. the bright colors of the monarch butterfly indicate that the butterfly tastes bad and can be poisonous. how does the appearance of these butterflies them to survive? f the indian leaf butterfly is able to avoid predators while the monarch butterfly warns predators away. g. the indian leaf butterfly frightens predators away while the monarch butterfly poisons predators before they can eat it. h both butterflies rely on camouflage to avoid predation. j both butterflies cooperate with one another to avoid predation.

Which is an example of a vestigial structure? a. tail of a monkey b. fin of a fish c. flower of a plant d. tailbone of a human

Scientific evidence is most likely to be consistent if it is based on data from