Is the punnett square 100% accurate? Explain.

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

Which identifies the main purpose of biological taxonomy?

4. multiple crosses were made between true-breeding lines of black and yellow labrador retrievers. all the f1 progeny were black. when these progeny were intercrossed, they produced an f2 consisting of 91 black, 39 yellow and 30 chocolate. a. propose an explanation for the inheritance of coat color in labradors. b. propose a biochemical pathway for coat color determination and indicate how the relevant genes control coat coloration.