In dna and rna, a nitrogenous base, sugar, and phosphate groups together are called a
a. hydrogen bond.
b. double helix.
c. sugar-phosphate backbone.
d. nucleotide.

Option d

Explanation: A nucleotide can be defined as the organic molecules that serves as the monomers for the nucleic acid polymers such as deoxyribonucleic acid and ribonucleic acid.

These are the most essential biomolecules of all the living forms on the earth. They are composed of the three sub units that make up the whole structure.

A nitrogenous base, a five carbon sugar and atleast a phosphate group constitutes to form a nucleotide.

Example: DNA and RNA

the major parts of the digestive system:

salivary glands.

pharynx.

esophagus.

stomach.

small intestine.

large intestine.

rectum.

accessory digestive organs: liver, gallbladder, pancreas.

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.