Answer:
Planet Y
Explanation:
Planet Y has the smaller period because it takes less time to orbit the star. This is because it has less distance to travel compared to X.
Answer:
The circulatory system ensures a steady flow of oxygen-rich blood to your brain, while your brain controls your heart rate and blood pressure. Even systems of the body that appear to be unrelated are linked.
Explanation:
Gene pool is the variety and available genes in a specific population of a species .
Answer:
Male part produce sperm and female part produce egg
