A protein spans the nuclear membrane, with a small extranuclear domain, a substantial segment crossing the nuclear membrane, and a domain within the nucleus. It is.(a) a peripheral membrane protein(b) an integral membrane protein(c) a lipid-anchored protein(d) impossible

(B) an integral membrane protein

Explanation:

Integral membrane proteins are deeply embedded in the nuclear membrane. While some integral extend only into the membrane matrix, Some integral proteins span the whole nuclear membrane and are called trans-membrane proteins because the span from the extracellular nuclear membrane to the innercellular membrane. The serve as transport channels.

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i would say that hybridization occurs frequently in nature, because there are many types of hybrids that have occurred naturally, such as the mule (male donkey + female horse)