Scientists studying the relationship between evolution and development have discovered a kind of gene called a Hox gene, which
tells a developing embryo where to build a particular structure, rather than
how to build that structure. How does the research into these Hox genes
support the principle of common descent even among widely different
groups, such as fruit flies and chickens?

According to this food web which of the following would be considered primary consumers

Which of the following types of stars is most likely to end up as a supernova? in graph a, the curve peaks at 800 nm, in the red section of the visible light spectrum. in graph b, the curve peaks at 550 nm, in the green section of the visible light spectrum. in graph c, the curve peaks at 450 nm, in the blue section of the visible light spectrum. in graph d, the curve peaks at 300 nm, in the violet section of the visible light spectrum. a b c d

Look at the photo of the leaf, which term best describes this leaf ? a-simple.b-parallel.c-lobed.d-tooth.