Which element is most important for adding strength to hair, feathers, and outer skin? oxygen hydrogen sulfur phosphorus

What must happen before meiosis can begin? a. four gametes must be produced b. the four tetrads must be pulled apart c. dna doubles and produces sister chromatids d. the cell membrane pinches together

Matched chromosomes carrying information about the same characteristics in the organism are called

The wind is to parities grasses because it them