I will give all my points to those who could help! 39. Which diagram above shows the very beginning of primary succession?
40. Which diagram shows a young woodland forest in secondary succession.
41. Which diagram shows mosses, ferns, and lichen beginning to colonize?
42. Which diagram shows plants that need a thin a layer of soil on the ground before they can develop (grow)?

any abiotic or biotic factor in an ecosystem that causes a population's size to slow or decrease is a limiting factor.

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.

several tissues working together form an organ, and several organs together make up an organisms.

the group of cell that carries out special jobs are tissue.