instruction:
Given a scientific question and its correct answer, generate supporting facts for the answer. This supporting fact can be an explanation for the answer to the given question.
question:
Question: What is the vector sum of all the torques acting on the object called? Answer: net torque
answer:
The net torque is the vector sum of all the torques acting on the object. When adding torques it is necessary to subtract CW from CCW torques.

question:
Question: What cells carry oxygen? Answer: red blood cells
answer:
Red blood cells carry oxygen, white blood cells defend the body, and platelets help blood clot.

question:
Question: Plants and algae maintain the atmosphere. during photosynthesis, they add oxygen and remove what? Answer: carbon dioxide
answer:
Plants and algae maintain the atmosphere. During photosynthesis, they add oxygen and remove carbon dioxide.