It’s C. I just recall hearing my teacher say that... sorry I have no explanation
Explanation:
<u>System</u> is a combination of several organs that perform together for a common function.
Hope it will help :)❤
Warm-blooded creatures, like mammals and birds, try to keep the inside of their bodies at a constant temperature. They do this by generating their own heat when they are in a cooler environment, and by cooling themselves when they are in a hotter environment. To generate heat, warm-blooded animals convert the food that they eat into energy. They have to eat a lot of food, compared with cold-blooded animals, to maintain a constant body temperature. Only a small amount of the food that a warm-blooded animal eats is converted into body mass. The rest is used to fuel a constant body temperature.
Answer:
b
Explanation:
some are the same while others are different (traits)
I think two are stem cell research and cloning
