A hydrometer is an instrument that measures the specific gravity (relative density) of liquids. The ratio of the density of the liquid to the density of water. A hydrometer is usually made of glass, and consists of a cylindrical stem and a bulb weighted with mercury or lead shot to make it float
1.) Cladogram
2.) taxonomy
The free nerve endings
can detect pain, temperature, itch and hair movement. Merkel's disks can detect pressure, position and static touch features. Pacinian corpuscles are sensitive to vibration while Meissner's corpuscles are sensitive to light and touch.
What holds the two strands of DNA molecules to each other. Hydrogen Bonds
First, tell your teacher that the Sun is not at the center of the UNIVERSE. He observatory that occasionally planets would travel backwards in the night sky & people also observed the moons rotating around Jupiter to prove his theory.
