Help this test is timed What is a system?
2 points
The solid rock part of Earth, including mountains, valleys, continents, and all of the rock beneath the oceans
The set of all water on the earth's surface, such as lakes, seas, and oceans
A group of related parts that all work together to perform a specific function
The greenhouse gases that help keep the earth at a temperature where water is in liquid form

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.

What evidence supports the law of conservation of energy? a) mechanical energy is converted to chemical energy during photosynthesis. b) oxygen is made from the breakdown of carbon dioxide during photosynthesis. c)energy is absorbed by chlorophyll and becomes chemical energy during photosynthesis. d)the sun gives off light energy that is absorbed by plants.

Which hypothesis most likely explains the results at 60°c and 70°c