The stem has more things to transport that's why it has more vascular bundles. The roots only get water from the ground and moving nutrients from the soil to transfer it to the stem. Having more vascular bundles helps the stems to transfer things to leaves and other parts of the plants.
Chloroplasts, they help the plant cells to perform photosynthesis which animal cells do not need
Waxing gibbous Moon is correct
Acidophiles is the correct