What is the texture of a sandstone

Phenylalanine is required for the production of many of your proteins, but none of your cells are capable of synthesizing this amino acid. What type of metabolic pathway must be responsible for providing this essential amino acid to your cells?

Which is the difference between an antibiotic and an antiviral

which process in the light dependent reactions results in the release of hydrogen ions, electrons, and oxygen

What evidence supports the theory of endosymbiosis? Mitochondria and chloroplasts are similar to prokaryotes they do not have theh own membranes Eukaryotic cells contain mitochondria and some contain chiorophyll. contain ribosomes.

A group of tissues working together is called a (an) :

Which statement best describes the relationship between activation energy and rate of reaction? O Increasing the activation energy can increase the rate of a reaction. O Reducing the activation energy can increase the rate of a reaction.

Definition: this is a haploid cell with half the reproductive information from the parent.

Does a cell use energy when molecules diffuse in or out of the cell? Why?

Below is a list of possible challenges. Check all errors that you mentioned in your answer. Traits other than beak type might affect natural selection. It could take many generations to observe adaptions to a population.

A farmer dug a well but did not find any water Which reasons most likely explain why the farmer did not find water? Check all that apply.