The is a layer of the embryo, which will become the nervous system and brain, sensory receptors, and skin parts.

In the diagram below, the northern hemisphere would be in what season at position a a.fall b. winter c.summer d.spring

Which of these is not an example of molecular homology? 1. use of dna and rna as genetic material 2.use of glycolysis as the first step in cellular respiration in both plants and animals 3. the lack of an igf-1 gene in prokaryotes 4. the use of aldolase b to break down fructose in bacteria, plants and animals

Veronica and her little sister, monique, are playing on a seesaw. if veronica weighs 75 pounds, and monique weighs 60 pounds, which statement is true?