A group of prokaryotes that live in extreme environments are what

At what stage of pregnancy does an embryo show a beating heart and a complete central nervous system

Give three examples of animal organ

Clusters of rer and free ribosomes in neurons are called

Some antibiotics can harm the ribosomes in animal cells. Which of the following would you predict to be the most likely long-term effect of damage to ribosomes?

Which of the following macromolecules is not used as an energy source for cellular respiration or fermentation? A. Carbohydrates B. Lipids C. Nucleic Acids D. Proteins

What is 6 mutagens chemical or physical agents?

During the last decade, the U. S. Fish and Wildlife Service has worked to reestablish the critically endangered California condor in its last stronghold, the mountains of southern California.

What were the conditions like on early Earth? (Be specific)

What is a solution? what happens when table salt and water form solution?

The hygrometer must be calibrated before it is used. How might this be done?