Human Biology, 14 Edition

Published by McGraw-Hill Education
ISBN 10: 1-25924-574-8
ISBN 13: 978-1-25924-574-9

Chapter 3 - Section 3.2 - How Cells Are Organized - Check Your Progress - Page 50: 3

Answer

The nucleus in eukaryotic cells is believed to have formed from invagination of the plasma membrane. This means that the plasma membrane formed a pocket that enclosed a small amount of the cell's DNA and formed its nucleus. Mitochondrion and chloroplasts are believed to have formed when prokaryotic cells were engulfed and over time evolved into organelles like mitochondrion and chloroplasts.

Work Step by Step

The nucleus in eukaryotic cells is believed to have formed from invagination of the plasma membrane. This means that the plasma membrane formed a pocket that enclosed a small amount of the cell's DNA and formed its nucleus. Mitochondrion and chloroplasts are believed to have formed when prokaryotic cells were engulfed and over time evolved into organelles like mitochondrion and chloroplasts.
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