Scientists often require keeping a stock of biological
collections because it is not possible for a scientist to every time go out and
get a sample. Scientists may require comparing several of his biological
subjects that might not always be found in the area, so it is important to keep
a collection. It depends on the type and size of the organism in question.
Certain organisms like butterfly may not be available in the area where the lab
is located. So the scientist has to make prior arrangement and keep a stock of
the organism.
They are educated guesses is not true. A theory must be supported by evidence. Also it is mixed up with the word hypothesis in which case you could say that is an educated guess. Not for scientific theory
Answer:
The four major groups of macromolecules found in living things are carbohydrates, lipids, nucleic acids, and proteins. Carbohydrates are compounds made up of carbon, hydrogen, and oxygen atoms, usually in a ratio of 1 : 2 : 1. Living things use carbohydrates as their main source of energy.
Hypercalcemia is when there's too much calcium in the blood
Predator . lion. Tigger example