The primary difficulty is the fact that we do not know all of the organisms that currently exist in the world along with those that existed in the past.
hormons. hormones are released from glands and they all belong to the endocrine system.
<span>Compound Microscope
Compound microscope is commonly used in the schools and colleges.
It comes under the category of microscopes used in biology.
It has two lenses namely the objective lens and the ocular lens.
It provides a magnification of 1500X.
Eyepiece lens is of 10X or 15X power.
It is used to observe bacterial, protozoa, various cells, etc.
</span><span>Dissecting Microscope
It is also called stereo microscope.
Its magnification power is less than the other microscope.
It gives a 3 dimensional picture.
Due to the low magnifying power they are used to observe little bigger objects than other microscopes.
They are used in the surgeries, dissection, forensic science etc.</span>
Answer:
ARN mensajero (ARNm), ARN ribosómico (ARNr) y ARN de transferencia (ARNt)