Because the molecules that are being transported is moving against its concentration gradient. in other words, its moving from where its low in concentration to where its high in concentration
Explanation:
Heterotroph. 100% correct. Goodluck. glad to help.
I think the answer is b, because cartilage is what helps with flexibility in tissues....
The main source of heat energy in the earth's inner core is radioactive decay, and the radiogenic heat producted by the radiogenic decay of isotopes in the mantle and crsut. I hope this helped
