Which is true regarding tolerable upper intake levels (uls) ?

Nitrogen-fixing bacteria live in protective nodules (bumps) on the roots of some plants. These bacteria are able to convert gaseous nitrogen from the air into a form of nitrogen that the plants can use. Which type of relationship is this?

In order, duck's phases of ending a relationship are:

Water has the ability to bond with A its own molecules. B molecules of a different substance. C both positively and negatively charged substances. D all of the above.

Why would scientists conduct investigations on a newly discovered alternative fuel? A. to comfirm that the alternative fuel increases atmospheric carbon dioxide B. to maintain the public dependence on fossil fuels C.

Which processes uses a body cell to create a new organism? Crossbreeding Cloning Genetic modification Gene splicing

Which is another name for observations? Models Predictions Data Inferences

A father has the genotype dd and a mother has the genotype dd fill in the punnett square below to show their possible offspring?

Which mineral is important for carrying o2 in the blood?

Which best describes an acquired trait?

How are new molecules of dna are synthesized by copying the genetic sequence of another molecule of dna, which we call the template, so that __?