Boys shoulders broaden and voice deepen, Girls start having menstrual periods and develop breast. <span />
Answer:
It excites electrons
Explanation:
Energy from sunlight excites electrons in plant cells and drives the chemical reaction needed to produce food in plants.
- This reaction is called photosynthesis.
- During photosynthesis, green plants manufacture their food using sunlight in the presence of carbon dioxide and water.
- The product of the reaction is glucose and oxygen gas.
- The role of the sunlight is to excite electrons which facilitates the process.
The simple microscopic organisms the only life forms on earth was 560 million years.
<span>New kingdoms were needed that reflected our growing knowledge of the differences between living organisms.
The classification system requires criteria to differ the organism. As the technology and research advance, we can observe more characteristic of many organisms and found more differences between them.</span>
When we use electronic devices in the classroom we must be:
- We have to be careful and always inspect all electrical equipment before using,
- Regularly inspect the equipment,
- Keep the power cord away from the floor and do not place objects on it-
- The ropes should not be twisted
- Attention must be paid to the electrical device while it is being used.
