C. Australia was covered in ice during a key geologic period.
at the time of coal forming, Australia was closest to the south pole, so it was too cold.
Answer:
See the answer below
Explanation:
Person X is feeling a burning sensation in several muscles<u> because of the accumulation of lactic acid due to inadequate oxygen in their system.</u> When oxygen becomes inadequate during exercises, anaerobic respiration takes place to augment the oxygen shortage and this leads to the production of lactic acid which accumulates up in the muscles and gives a burning sensation.

Person Y does not feel any burning sensation in their muscles <u>because oxygen is adequate in their system and they do not need to respire anaerobically.</u> <em>Person X exercise regime must have been more rigorous than that of person Y.</em>
Answer:
0.6... or 3/5
Explanation:
To find the acceleration, we need to use the acceleration formula:
So all we have to do now is plug in the numbers:
Once we divide 60 by 90, we will get the acceleration of the marble.
- 60/90 = 0.6... (repeating)
Our final answer should be:
0.6... or 3/5
Cellular respiration provides the ATP necessary for muscle contractions