Answer:
The question is incomplete, the questions asked by the students were as follows:
1. What kind of plant life grows naturally in the town park?
2. Which types of treats do different types of dogs like best?
3. Do different types of grass affect how far a ball rolls?
4. How are the chemicals in different vegetables similar?
The answer is 3
Explanation:
Three types of investigation are used by scientists to solve a problem or answer a question. These questions are: comparative investigation, descriptive investigation and experimental investigation. Experimental investigations are conducted to test the relationship between two variables. In the test, one of the variable is manipulated (independent variable) while the other responds (dependent variable).
In this case involving questions asked for a science fair, HOW DIFFERENT TYPES OF GRASS AFFECT BALL ROLLS is most likely an experimental investigation because it is testing the effects of grass type (independent variable) on ball roll (dependent variable).
The brain and the spinal cord.
Because as we evolve .....Some adaptation occurs according to the environment.....so the parts which are not right according to the environment and evolution become vestigial !!!
It's where something is wrong with the lung and they switch it out for another lung.
The energy of the ecosystem can be best described as option C. The amount of energy entering an ecosystem from the Sun is equal to the amount used by organisms plus the amount lost as heat.