Which of the following is an example of a biological system?
O
A. The heart, lungs, and blood vessels working together to carry
oxygen throughout the body
O
B. A science fair project modeling the process of breathing in the
human body
O
C. A biology textbook
D. The Internet

Mario performed an experiment to determine if photosynthesis was affected by the amount of light that a plant received. what could he have done to increase the validity of his data? reduce the number of plants. remove the 1 hour group. add a 0 hours control. measure the oxygen in liters

Drag each label to the correct location on the table. each label can be used more than once. decide whether each statement describes saturated fat, unsaturated fat, or both saturated and unsaturated fats.

In the sentence "a mining company will consider the distribution of coal when deciding how to mine the coal," what does the word distribution mean?