The coelom of most deuterostomes develops from outpocketings

The coelom of most deuterostomes develops from outpocketings of the endoderm of the gut. Torsion is a unique characteristic of all mollusks. Fishes may rely on their lungs for buoyancy. Sessile animals are often filter feeders. Fruits are expanded anthers. The spleen filters blood and removes damaged red blood cells. Coenocytic fungi have many nuclei in one extensive cytoplasm. Segmentation allowed the development of specialized appendages. Animals that have nerves always have brains. Mollusks have closed circulatory systems. You could kill a starfish by cutting off its arms. Reptiles never have gill slits. The heart of an adult amphibian has three chambers. Phloem transports organic nutrients from leaves to roots. Sieve tube members are found in xylem. Tracheids are a type of cell in phloem. Xylem transports water from roots to leaves. Sponges have three tissue layers. Higher plants have a minute diploid phase. Many fungi depend on plants for mineral absorption. If lichen were sprayed with a chemical that blocked photosynthesis, it would probably die. The insects include more species than any other group. Poikilotherms are unable to produce body heat. Leaves are broad and thin to minimize their absorption of oxygen. Water can hold more oxygen than air can. Book lungs are found in crustaceans and mollusks, while external feathery gills are found in arachinids. Saprobes parasitize plants. In coelomates, but not in pseudocoelomates, a peritoneum completely lines the coelomic cavity Trypanosomes possess a kinetoplast (a mass of mitochondrial DNA close to the nucleus) Psychrophiles live in extremely hot conditions Above 100 degree C Spirogyra is a plant protist Shigella spp is a bacteria that causes dysentery Anthrax is a bacteria that can be used in terrorism. Plants have internal clocks.

Solution

17. True

18. true

19. false

20. True

21. false

22. True

23. True

24. True

25.false (platyhelminthes)

26.True

27. false

28. True

29.false (only in croodile, birs and mammals)

30.True

31.false

32. false

33. True

34. false diploblastic

35. false

36 True

37 true

38 True

39 True

40 True

41 True

42 True

43 false

44 True

45 True

46 false

47 True

48 True

49. True

50. True (hormone)