When scientists obtain the biomass of samples, they heat it at 75 °C for 2 hours. They weigh the sample, reheat it for 15 minutes and weigh it again. They continue this cycle of reheating and weighing until they find the sample has a constant mass. Explain how this method helps to provide a reliable measurement of the biomass. (2 marks)

Explain how sequences of amino acids in proteins can be used to reveal relationships among organisms.

Sort the examples by the type of diversity that they exhibit a park has 80 species of trees red, yellow, and orange bell peppers are all members of the same species individuals of the same lizard species have different mating strategies. five different bird species are at a bird feeder. genetic diversity species diversity

Which statement about relative potential energy of electrons is correct? a. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 2 s orbital of the second electron shell. b. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 3 p orbital of the third electron shell. c. an electron in the 3 p orbital of the third electron shell has more potential energy than an electron in the 2 p orbital of the second electron shell.