During Stage I of development, a human embryo, a bat embryo, and a chicken embryo look strikingly similar. What theory does this support?

Cell differentiation is critical during embryonic development. The process of cell differentiation results in the production of many types of cells, including germ, somatic, and stem cells.

What differences, if any, would this assay show if performed using raw (unpasteurized) milk?

why does someone experiencing anaphylaxis need to receive medicine through injection instead of swallowing a pill

How do the structures in an organism relate to its function

Are the backbones of the DNA molecule identical in all living things?

How can the level of pain you feel vary if a stimulus causes an all or none response?

How long does gunpowder residue remain on a shooter's hands? A few hours About 24 hours A few days About a week

Why are some planets made of frozen gases and others solid?

The skin is the primary organ of the

What is true for urochordates? A. The notochord is present throughout their lives. B. The notochord is present only in the larval stage; it is absent in adults. C. The notochord is present in the larval stage; it becomes vertebrae in adults.