Which kind of rock is most likely to contain a trilobite fossil? 1) sedimentary
2) igneous
3) metamorphic
4) plutonic

Explain how it formed. Thank you.

The infrared (ir) and the ultraviolet(uv) represent the two extremities of the visible spectrum (400-700nm). while ir represents electromagnetic radiation with wavelengths longer than those of visible light, uv represents wavelengths shorter than visible light

Centriole.centrioles are present in animal cells but are usually absent in plant cells.

Air enters through the nose (and sometimes the mouth), moves through the nasal cavity, the  pharynx, the  larynx, enters the  trachea, moves through the  bronchi  andbronchioles  till the alveoli.

Sorry  i don't understand can you rephrase that