Answer:
Villi, alveoli and nephrons are similar as :-
B. They provide large surface areas for molecular exchange.
The statement that explains why carbon-14 cannot be used to date rocks is : ( C ) Carbon-14 can be used only to date the remains of organisms
<h3><u>What is carbon-14 dating</u></h3>
Carbon-14 dating ( radiocarbon dating ) is used to determine the age of a material or substance which must be part of a living organism that has once existed or is still existing.
Carbon -14 dating cannot be used for determining the age of ancient rocks because of :
- The half life of carbon-14 dating and
- Ancient rock materials are not part of a living organism
Hence we can conclude that The statement that explains why carbon-14 cannot be used to date rocks is : Carbon-14 can be used only to date the remains of organisms.
Learn more about Carbon-14 dating : brainly.com/question/9308585
Answer:
active transport
Explanation:
they are using energy to move across the membrane, using energy means its active Hope this helps
Radiation. conduction. convection.