For each of the following questions about membrane transport, answer using simple diffusion, facilitated diffusion, or active transport. **note that more than one may be true for each question, and you may use an answer for multiple questions. a. which process(es) is (are) not energy-dependent? b. which process(es) require(s) a carrier protein or prote er protein or proteins? c. which process(es) can establish a concentration gradient? d. which process(es) can be saturated by a substrate?

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a

c-14 is carbon-14, or radiocarbon.   it is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.

answer is: nuclear fusion produces elements that are heavier than helium.

nuclei combine to form a heavier nucleus, releasing energy.  

for example, fusion of hydrogen atoms at the sun.  

this fusion nuclear reaction is in the inner core of the sun and hydrogen (atomic number 1) is conveted into helium (atomic number 2).  

the inner core is the central region of the sun and all solar energy is produced in the core by nuclear fusion.