Examlex
Covalent bonds generally form between
Calcium Crystals
Mineral deposits found in various tissues of the body, often in bones and teeth, contributing to their hardness.
Silica Crystals
Rigid, crystalline structures made of silicon dioxide (SiO2), found in nature as quartz and used industrially and scientifically for various applications.
Spicules
Small, spike-shaped structures found in certain animals like sponges, serving as a skeletal element.
Radial Symmetry
Body plan in which similar parts are arranged around a central axis, like spokes of a wheel.
Q34: Magnesium burns brightly in the presence of
Q43: Carbon has _ valence electrons.<br>A) one<br>B) two<br>C)
Q49: John Dalton discovered which of the following
Q55: Leucippus and Democritus believed that all of
Q57: Which of the following statements about basic
Q69: Which antacid also acts as an antidiarrheal
Q76: How many electrons are there in a
Q102: A solution with a pH of 3
Q154: _ is considered by many people to
Q161: Ions are<br>A) charged atoms (or groups of