1) A(n) _________________ is a group of ecosystems with similar climates and organisms.  a) ecosystem b) biome c) food chain d) energy pyramid 2) There are _________ major biomes. a) 2 b) 5 c) 6 d) 8 3) The tallest layer of the rainforest is the _________________, which can reach up to 70 m. a) emergent layer b) canopy c) understory 4) The ________________ is the 2nd layer of the rainforest and is a leafy roof. a) emergent layer b) canopy c) understory 5) The _______________ is a layer of shorter trees and vines which grow well in the shade. a) emergent layer b) canopy c) understory 6) A grassland located close to the equator is known as a ____________________. a) prairie b) savanna c) hilltop 7) Oaks and maples are examples of __________________________ because they shed their leaves and grow new ones each year. a) coniferous trees b) evergreen trees c) deciduous trees 8) ___________________ trees produce their seeds in cones and have needle-shaped leaves. a) coniferous b) palm c) deciduous 9) The frozen soil in the tundra is known as ________________________. a) ice b) snow c) taiga d) permafrost

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