The number of electrons that can be held in the second orbit

Compare and contrast nutrient limitation in soil vs. nutrient limitation in aquatic ecosystems

Use the drop down menus to match each example to the fossil topic discussed then to show how the fossil record gives evidence of evolution

In a classic experiment using pea shape, mendel conducted two separate genetic crosses. in the first cross the parent plants were “true breeding” for pea shape; one had round peas ( r )and the other had wrinkled (r). the first cross produced a filial 1 generation of all round peas. in the second cross, mendel bred plants from the filial 1 generation. this cross produced different results. out of approximately 1000 plants, about 75% were round and 25% were wrinkled.