At a certain locus of the human genome, 200 different alleles exist in the population. Each person has at most allele(s).

How many trophic levels are there in the following food chain? phytoplankton - shrimp - perch - pike - osprey

And give a detailed description! scientist observes the boundary between two tectonic plates for a decade and finds that no new volcanoes have formed over the course of her investigation. does this result support the theory of plate tectonics? why or why not?

Look at the photo of the leaf. which term best describes this leaf?