Because if there are no animals we can't live, we purposely mix breeds maintaining more than one resource. <span>Maintaining biodiversity has a direct economic value to humans, as well as indirect economic value because our ecosystem is affected by any imbalances in the environment. For example, a lack of trees will mean we don't have enough oxygen to breath. A lack of fish will mean many animals that feed of sea creatures will die.</span>
Human skin cells are eukaryotic.
Prokaryotic cells are unicellular and don't have a nucleus with a membrane. However, human skin cells have both a membrane and are not unicellular.
Answer:
Metamorphic rocks are caused by heat and pressure
Answer:
The nervous system has two main parts:
The central nervous system is made up of the brain and spinal cord.
The peripheral nervous system is made up of nerves that branch off from the spinal cord and extend to all parts of the body.
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Protein is the general term for the biochemical makeup of the antigens of the rh system.
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Protein </h3>
Proteins are substantial biomolecules and macromolecules made up of one or more extended chains of amino acid residues. Among the many tasks that proteins carry out in living things include catalyzing metabolic processes, replicating DNA, responding to external stimuli, giving cells and organisms structure, and transporting substances. Proteins differ from one another principally in the order of their amino acids, which is determined by the nucleotide sequence of their genes. This causes proteins to fold into a certain 3D structure, which controls their activity. The term "polypeptide" refers to an ordered chain of amino acid residues. One or more lengthy polypeptides must be present in a protein.
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