Which evidence has led scientists to conclude that there are different layers within Earth's interior? (1) analysis of earthquake wave data
(3) rock samples taken from Earth's core
(2) measurement of Earth's diameter
(4) temperatures taken within each layer

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.