The first line of defense involves which structure? a. Tcell, b. skin, c. blood, d. b cell

Which best describes an adaptation that could be found in a fish that lives in a slow-flowing stream? the ability to attract prey by glowingextra gills, for oxygen extractionthe ability to grow largerextra fat, for warmth

How do you date a sample of rock that you suspect as being one of the earliest on earth

What is the term for the two sets of chromatids formed in the parent cell a.haploid b.diploid c.gamete d.tetrad