Which abiotic factor is the most limiting in terms of the amount of food plants can produce? Here are the options
A: Sunlight hitting the leaves
B: Amounts of carbon dioxide
C: Amounts of oxygen
D: Amounts of oxygen

Look at the images of different rocks. which rocks have a fine-grained texture? check all that apply. 1 2 3 4 5

Consider darwin's first writings on the theory of natural selection. an important point of darwin's essay on the principle of population, written in 1798, was a peer's observation that in nature plants and animals produce far more offspring than can survive, this observation can be attributed to a) charles lyell. b) thomas malthus. c) jean-baptiste lamarck. d) johann friedrich meckel.

What was the land like over 500 million years ago? what was under the sea?