What difficulties might scientist face when classifying organisms?

Found evidence that the continents were joined together at one time.

Which geologic feature would most likely be represented by contour lines john far apart from one another? a cliff a hill a plain a valley

Which of the following are the ingredients that go into the plant and are needed for photosynthesis? select all that apply. 1.) soil 2.) seeds 3.) carbon dioxide 4.) minerals 5.) glucose (sugar) 6.) water 7.) light energy (sunlight) 8.) oxygen 9.) air