Answer:
because they r
Explanation:
In the particular case of motion, a reference point is a stationary point in space. ... A reference point is important in determining motion because in order to say that something is moving, you need to have something stationary to compare it to.
Answer:
- E. Does photosynthesis performed by elodea remove CO2 from the water?
- F. Does cellular respiration occur at a higher rate than photosynthesis in the tube with only elodea?
Explanation:
The tubes were placed under a growth light and as the elodea is growing, it would need photosynthesis to provide food. The color changes will therefore allow the students to see the effect photosynthesis has on the CO2 in the water by checking to see if the BTB turns blue which would mean that CO2 was removed by photosynthesis.
The students will also be able to see which process occurs faster in the tube with only elodea because the dominant color would show if cellular respiration occurs faster than photosynthesis or if the case is the reverse. For instance, if respiration is occurring faster, there will be more CO2 which would turn the BTB towards yellow, if photosynthesis is faster the BTB will turn towards blue and if the rates are similar, the BTB will remain green.
Answer:
There are too few air particles in space for longitudinal waves to travel.
Explanation:
1) I took the test and it was correct.
2) Longitudinal waves need a medium to travel through and in space theres really nothing the wave can use for a medium.
The endocrine system is composed of glands that engender and secrete hormones, chemical substances engendered in the body that regulate the activity of cells or organs. These hormones regulate the body's magnification, metabolism (the physical and chemical processes of the body), and sexual development and function.
Its the one all the way at the bottom