What effects do keystone specie shave on an ecosystem?
A. They make prey species extinct
B. They reproduce biodiversity
C. They keep populations of species balanced
D. They cause primary disturbances.

Which of the following is a difference between a food chain and a food web? selected: a. food webs contain both plants and animals. food chains only contain animals.this answer is incorrect. b. food webs show energy transfer. food chains show which animal eats which animal. c. food webs separate organisms by tropic level. food chains do not. d. food webs are a complex patterns of energy flow. food chains only show one line of energy flow.

Galaxy whose shape seems different follow no set pattern are classified as

Harold makes a venn diagram to him compare and contrast mitosis and meiosis. which label belongs in the region marked z? forms diploid cells creates an even number of cells includes two rounds of cell division duplicates body cells