safiyabrowne7286
05.09.2020 •
Biology
A friend of yours is using the Mark and Recapture technique to study the butterfly population in the area around his school. He first marked and released 50 butterflies. For four weeks, he checked his traps daily, counted the butterflies in the traps, and then released them. He caught a total of 300 butterflies, and 25 of them were marked. He determined that the total population of butterflies is 150. Is he correct? If not, what is the size of the butterfly population he is studying, and what mistake did he make? Prepare a brief answer to send to your friend by e-mail. Show all calculations.
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Ответ:
Among what trees do is take in CO2 and give out O2.
During spring/summer, there are more trees (living) than in fall/winter.
So, there is less CO2 in the atmosphere in spring/summer.