Answer:
Both are used for breathing.
Explanation:
When rib muscles and the diaphragm contract they increase the volume of the chest cavity, increasing the air pressure outside the body, causing air to rush into the lungs to fill the vacuum created by the increase in volume.
A(it is invisible) and D (it does not emit electromagnetic radiation)
Answer:
The correct option is a waxy, water proof layer that protect leaves.
Explanation:
Cuticle is prent on leaf surface chemicall mad from cutin. this chemical compound is waxy like, predominant in citrus family and prevent dehydration.