If you measure the width of a book with a ruler you are collecting DATA. Data is the facts and statistics collected together for analysis.
Answer:
Changes in intracellular pH can potentially affect virtually all cellular processes, including metabolism, membrane potential, cell growth, movement of substances across the surface membrane, state of polymerization of the cytoskeleton and ability to contract in muscle cells.
The concentration of hydrogen and hydroxide ions in an aqueous solution can greatly affect both the structure and chemical reactivity of cellular molecules. Cells are cell organelles must maintain an appropriate pH in order to function optimally.
Cell migration occurs extensively during both gastrulation and organogenesis.
Cell migration occurs extensively during gastrulation and organogenesis. During gastrulation three germ layers are formed. The Ectoderm, mesoderm and Endoderm are formed and these are positioned by the migration of epithelial and mesenchymal cells. During organogenesis organs are formed by the germ layers.
Cells migrate to form a specific organ. Organogenesis is the process happening right after the gastrulation. Cleavage is the process of division of cells without increasing its size. During this process cell migration doesn't happen. Hence all the other options except option D are incorrect.
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