There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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Most women experience menopause in their 50s. However, in 1994, an Italian woman gave birth to a baby boy when she was 61 years old.
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Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.
This cat has accepted this pair of guinea pigs.
Covalent bonds form by the sharing of electrons
What atomic or hybrid orbital on P make up the sigma bond between P and Cl in phosphorous ...
An organism has alleles R1 and R2 on one pair of homologous chromosomes, and it has alleles T1 ...