What are the four most abundant gases in earth's crust?

I need biology help please?

• 1. How many chambers are found in the bird's heart? A. 1 B. 2 C. 3 D. 4 2. In what way is the body plan of a snake different from that of a typical reptile? A. Snakes have moist skin. B. Snakes do not have lungs. C. Snakes have two-chambered hearts. D. Snakes have no legs. 3. Modern hominids are A. Homo sapiens. B. Australopithecus afarensis. C. Homo erectus. D. Homo habilis. 4. One reason for the early success of reptiles was that A. reptiles could reproduce away from water. B. reptiles were strictly aquatic. C. Earth's climate became warmer and more humid. D. lakes and swamps became more numerous. 5. Most reptiles exchange gases through their A. gills. B. skin. C. lungs. D. limbs. 6. If a bird has a hooked bill and sharp talons, it might be a(an) A. water bird. B. ostrich. C. bird of prey. D. perching bird. 7. Which of the following help mammals retain body heat? A. hair and sweat glands B. hair and body fat C. bones and sweat glands D. bones and body fat 8. A four-chambered heart is found in A. lizards. B. snakes. C. turtles. D. birds. 9. Kangaroos, koalas, and opossums are A. placental mammals. B. marsupials. C. monotremes. D. cetaceans. 10. The separation of populations by barriers such as rivers, mountains, or bodies of water is called A. timing isolation. B. geographic isolation. C. behavioral isolation. D. genetic equilibrium. 11. The earth’s crust is part of the _____________. A. hydrosphere B. lithosphere C. atmosphere D. biosphere 12. Living creatures are part of the ________________. A. lithosphere B. biosphere C. atmosphere D. hydrosphere 13. The largest unit of study in ecology is ____________. A. ecosystems B. the bioshere C. communities D. populations 14. Which of the following is an important factor when determining climate? A. Distance from water B. Altitude C. Latitude D. All are important factors. 15. Which terrestrial biome commonly contains permafrost? A. Chaparral B. Desert C. Tundra D. Savanna 16. The greatest diversity of life is found in which biome? A. Tropical forest B. Temperate forest C. Chaparral D. Desert 17. The only mammal capable of true flight is the ___________. A. bat B. squirrel C. bird D. dolphin 18. A mammal which lays eggs is the _________. A. koala B. platypus C. kangaroo D. none of the above. No mammals lay eggs 19. Humans fall under which category of animals? A. Not animals B. echinoderms C. primates D. canids 20. The earth’s rocks are part of the ___________. A. hydrosphere B. atmosphere C. biosphere D. lithosphere 21. Heat is transferred throughout the atmosphere by ____________. A. radiation B. convection C. conduction D. all of these methods 22. What is a wetland which forms along a river called? A. Estuary B. Swamp C.Bog D. Marsh 23. Earth’s most recent era is the A. Paleozoic. B. Mesozoic. C. Cenozoic. D. Precambrian. 24. Which of the following is NOT an adaptation that enables reptiles to live out of water? A. having four legs B. having lungs C. having scaly skin D. laying eggs that have protective membranes 25. One method snakes use to locate prey is to flick their tongue in the air and then draw their tongue across the roof of their mouth. In this method, the function of the tongue is to A. collect chemicals in the air. B. measure the temperature of the air. C. pick up vibrations from the air. D. sense the direction of the wind. 26. A four-chambered heart is found in A. lizards. B. snakes. C. turtles. D. alligators. 27. Climate conditions in a small area that differ significantly from the climate of the surrounding area are called A. natural features. B. microclimates. C. biomes. D. ecosystems. 28. Ponds and lakes are A. flowing-water ecosystems. B. wetlands. C. standing-water ecosystems. D. estuaries. 29. During soaring flight, a bird A. rises on a current of warm air. B. coasts downward through the air. C. moves its wings rapidly. D. folds its wings against its body. 30. What characteristic is used to classify a mammal as a monotreme, marsupial, or placental mammal? A. the environment in which it lives B. how much hair or fur it has C. the structure of its brain D.the way in which its young develop 31. The large muscle that enables mammals to breathe in and out is called the A. lung. B. respiratory muscle. C. air sac. D. diaphragm. 32. If an animal is an ectotherm, it has A. a skeleton on the outside of its body. B. a skeleton on the inside of its body. C. a body that regulates its own internal temperature. D. a body that does not produce much internal heat. 33. Birds are theorized to have evolved from reptiles. A. true B. false

• Answer:

  That is absolutely unacceptable. Do your own homework, will you?