The answer is c (I think)
Answer:
I guess Comparative anatomy
Need more information to answer this question.
However, an example of a cam plant is a cactus. They have CO2 -carbon dioxide- to produce acids. It stores the CO2 at night so it can be used during the day because cam plants are in extreme hot conditions. They release it during the day and it's formed in the Calvin cycle during photosynthesis to make glucose.
I may be wrong but I think the answer is Photosynthesis.
Answer:
Here are seven theories complied by the science daily LiveScience which suggests the origins of Life.
1 Panspermia.
2 Simple Beginnings. ...
3 RNA World. ...
4 Chilly Start. ...
5 Deep-Sea Vents. ...
6 Community Clay. ...
7 Electric Spark. ...
Explanation: