What can create variations in color or structure in hair samples?

Dyes

The location on the scalp the sample is pulled from

The length of the strand

All of the above

List the three parts of the sternum from superior to inferior

To study the details of protein molecules on the surface of a cell, a biologist would likely use a A) compound light microscope B) dissecting microscope C) Scanning electron microscope D) transmission electron microscope

It contains two arteries and one vein entwined and enclosed by a protective, gristly substance called Wharton's Jelly. Blood constantly pulsates through it with every beat of your baby's heart. It is the A) villi. Eliminate B) placenta.

Egestion occurs through the ...

Drinking alcohol makes the blood hypertonic. Which option best describes the consequences of this hypertonic blood?

How do cells acquire positional information about their location in a developing embryo?

Which kind of solution is the concentration of solutes the same inside and outside if the cell

Identify the two primary fluids found within the eye. which one of these fluids provides nutrients to the rest of the eye

How are microscopes advantageous to scientist? name two examples when a biologist (or other scientist) may use a microscope?

Some geneticists study the genes that control bone development to try to understand bone growth and find cures for diseases. How is this different from an orthopedist (a doctor who specializes in bones) ? A.