This one can be tricky, because your are changing the appearance of the substance. But here, you aren't changing its chemical form, so its a physical change. Even though you can't bring the pencil to its original beginning, its still a physical change.
Answer: Physical change.
A physical environment with different species that interact with one another and with non-living thing is called an ecosystem
Answer:
The cell membrane, or in plant cells, the cell wall
Explanation:
In a plant cell the cell wall helps maintain structure, and in animal cells, the cell membrane regulates what goes in and out of the cell and acts as a structure
Answer:
a biology respiration is a set of metabolic reactions and processes that take place with in the cells of organisms.
Explanation:
Answer:
Meotic cell division (mitosis)
