Most of the nitrogen gas in earths atmosphere comes from?

In E. coli, there is a mutation in a gene called dnaB that alters the helicase that normally acts at the origin of replication. Which of the following events would you expect to occur as a result of this mutation?

If it takes a planet 2.8 x 10 to orbit a star with a mass of 6.2x 10 kg, what is the average distance between the planet and the star

Genetically modified grass varieties that carry genes for disease and drought resistance are now available. They were produced by recombinant DNA technology.

What is the main function of Cellular respiration (1) using carbon dioxide (2) releasing energy (3) producing oxygen. (4) circulating blood.

Lipids and proteins are both types of what

How do fish nets effect the ocean's ecosystem?

A dog and a pig attempt to mate. we are aware that these are two different animal species. but what is the best explanation for the barrier that makes it impossible for them to successfully mate?

How do fossils and fossil record support the idea that life changes over time

1 reason why cases of violence and abuse are not reported

Question number 3 Site A is pavement. Site B is bare soil. Site C is a forest. Soil erosion caused by runoff will be greatest at Site be greatest at Site