The answers are yeast and penicillium.
Some yeasts are used in medicine, for example, some Saccharomyces species, Candida species, etc. They are used for the production of some amino acids, vitamins (C, B2), some proteins (insulin). Penicillium is used for production of antibiotics.
Some have been noted to live as long as 6 days without there head.
The answer for your question is preganent
What are the two primary sources of energy for the earth
