The main three theories are that - all organisms are composed of cells- the cell is the basic unit of structure and organization in organisms- All cells come from pre-existing cells
Organ system that provides protectionfor the body and maintains homeostasis. (skin, hair, nails) Madeup of Epidermis & Dermis. Theoutermost, thin layer of skin, which contains proteins and is composed of 5 smaller layers of stratified squamous.
Answer:
Cell Membrane
Explanation:
The unique structure of the cell membrane allows small substances (like oxygen or carbon dioxide) to easily pass through.
Las coyunturas
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Answer:These six pollutants are carbon monoxide, lead, nitrogen oxides, ground-level ozone, particle pollution (often referred to as particulate matter), and sulfur oxides.
