Question

what is ser............. ​

Answer 1

Explanation:

There are two verbs that mean “to be” in Spanish, ser and estar. Ser is used in a simple way, to talk about WHAT something is (permanent state). To describe characteristics that are an essential part of the thing we're talking about.

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Answer 2

Smooth ER — It is called smooth endoplasmic reticulum when no ribosomes are attached to the membrane.