Which of the events listed below occur in the light reactions of photosynthesis?.

Which two statements are true about a system? 1. a system is a group of objects analyzed as one unit. 2. energy that moves across system boundaries is conserved. 3. there’s only one way to define the boundaries of a system. 4. all systems are made by humans.

Susie ran a race. she ran 55 miles an hour, and the race took her tt hours to complete.

You can reduce glare in snowy weatuer by?