Stores lining cuts off unused time
Three variables can be used .
1. Sun 2. Moon 3. Earth
These are suggestions that lizzie can control:
1.<span> Discover how long the Earth takes to orbit the Sun
2. how many hours it takes the Earth to spin around once on its own axis, 3. how long the Moon takes to orbit the Earth</span>
Answer:
chemical that target the cells is 18. example endocrine gland eg.prosterior pituitary , hormone eg. ADH , target tissue eg. kidney