Name the three key mechanisms important for maintaining the organization of cells into tissues

What will be an ideal response?


1. cell communication
2. selective cell–cell adhesion
3. cell memory

Biology & Microbiology

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Why is gel electrophoresis so important when studying genetic variation?

A. Gel electrophoresis enables a scientist to identify dominant and recessive traits. B. Gel electrophoresis enables scientists to identify proteins of different size or charge. C. Gel electrophoresis enables scientists to replicate a strand of DNA. D. Gel electrophoresis enables a scientist to link phenotype to genotype. E. Gel electrophoresis enables a scientist to sequence DNA.

Biology & Microbiology

What is the first step in the major events of the inflammatory process?

A. Injury and mast cells releasing chemical mediators B. Activation of complement C. Scar formation and/or resolution D. Vascular reactions E. Formation of pus and edema

Biology & Microbiology

Which of the following individuals has a recessive phenotype?

A. aAbB B. Aa C. AA D. AaBb E. aabb

Biology & Microbiology

How do planarians survive without a circulatory system? What will be an ideal response?

Biology & Microbiology