Terrestrial vertebrates use the urea cycle to convert the ammonium ion to urea such that the urea can be excreted. In the production of urea, only one of the nitrogens in the product comes from ammonium ions. What is the source of the other nitrogen?

Asparate is the source of other nitrogen

Explanation:

In the terrestrial vertebrate urea cycle is present which converts ammonium ions to urea and then this urea is excreted out of the by through urine.

First ammonia and bicarbonate combine to form Carbamoyl phosphate. The Carbamoyl phosphate and ornithine get condense to citrulline. Until here the reaction occurs in mitochondria.

Then the citrulline is transported in the cytosol where another nitrogen is added by an amino acid called aspartate and citrulline is condensed into argininosuccinate and aspartate converts and released as fumarate. So the correct answer is aspartate.

the answer would be 2, if crossing over doesn’t occur 2 out of 4 of the daughter cells will have that allele.

hope this : )

answer:

the water molecules are transferred from the roots to the stem or top parts of the tall tree because of important properties of water which are adhesion, cohesion and capillary action. cohesion is the property of water molecules keeps water molecules in a combined state by sharing of bonds between them at the atomic level. adhesion allows the interaction of water molecules with other substances or substrate. adhesion will cause the attachment of water molecules to the wall of the vessel (xylem) of the plant. capillary action occurs when the adhesive force to the vessel wall is stronger than the cohesive force between water molecules. capillary action mimics the transfer of water from a tube or pipe. in this way water utilizes its property to transfer water from down to top level of the plant.