Suggested Reading on Antiemetics by Our Doctors. Gallstones Gallstones are stones that form when substances in the bile harden. Food Poisoning Food poisoning is common, but can also be life threatening. Brain Tumor A brain tumor can be either benign (non cancerous) or malignant (cancerous), primary, or secondary.
Ants live in colonies where one or a few females, called queens, lay all the eggs. Most of the queens' offspring become worker ants that do not reproduce. A few are males, and some become new queens. Each queen ant can lay thousands of eggs per year.
Ants are social insects and are divided up into three castes: workers, males, and queens (figure 1). Workers are sterile, wingless females which range in size from 1/20 inch long to about 1/2 inch long. The workers of some ant species vary in size and are divided into major (large) and minor (small) workers. Ants vary in color from yellow to red to brown and black and various combinations of these. Like all insects, ants have three distinctive body parts: head, thorax, and abdomen. All ants have a pair of elbowed (bent) antennae on the head and a constricted area between the thorax and abdomen called the petiole. The petiole has either one or two nodes (bumps) (figure 2).