Please help me answer number 4 and 5

Are salt and soap nutrients or toxins for yeast? explain.

Identify characteristics of energy from the sun. check all that apply. almost all of the energy on earth comes from the sun. energy from the sun is known as mechanical energy. the energy in fossil fuels originally came from the sun. plants convert the energy of sunlight into chemical energy.

Were you able to observe the nucleolus in any of the cells if so which ones