When did humans first appeared on earth

A team of scientists altered the DNA of E. coli bacteria. The bacteria thus developed had the ability to generate insulin exactly identical to the human insulin molecule.

Ciprofloxacin inhibits dna gyrase, a bacterial topoisomerase that cuts dna ahead of the replication fork, winds the dna in a direction that relieves the twists added during dna synthesis, and then reseals the dna.

Microbial population growth is represented bu the graph. Based on this model we would expect the population growth of this colony to A) be exponential

Four types of functional groups?

What is true about enzymes? A. Enzymes provide the heat energy for a reaction. B. They lower the energy required for a chemical reaction. C. They slow the chemical reactions that take place in a cell. D.

If a species is suddenly introduced into a new habitat, what might occur?

Brainliest hurry timed! How many groups did Aristotle use to divide all of the organisms in the world? 1 2 3 4

Carl wants to find out how exercise affects the body temperature of different people. What tool will Carl need in order to conduct his experiment?

3 How does rain form? Water rises, cools, evaporates, and then condenses. Water cools, condenses, evaporates, and then rises. Water evaporates, cools, rises, and condenses. Water evaporates, rises, cools, and then condenses.

Which are biotic factors in an American alligator's environment? Choose all answers that are correct. A. temperature of the water B. amount of oxygen gas in the water C. type of grass needed for nests D. number of available mates