Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
Did you know?
The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."
Did you know?
Critical care patients are twice as likely to receive the wrong medication. Of these errors, 20% are life-threatening, and 42% require additional life-sustaining treatments.
Did you know?
Excessive alcohol use costs the country approximately $235 billion every year.
Did you know?
Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
Body plan of a flatworm.
Animals and their babies
Human Body by Children
Limestone: A Marine Sedimentary Rock
Sandwich or capture enzyme immunoassay. The first antibody captures antigen from a body fluid (or ...
Microbiology with Diseases by Body System, 3e (Bauman)