Cridarians have surface cells called choanocytes that contain prey capturing str
ID: 84379 • Letter: C
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Cridarians have surface cells called choanocytes that contain prey capturing structures known as nematocycts. The coeiom of most deuterostomes develops from outpocketings of the endoederm 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. During double fertilization, one sperm nucleus unites with the microscope mother cell. Coenocytic fungi have many nuclei in one extensive cytopiasm. Segmentation allowed the development of specialized appendages. Animals that have nerves always have brains. 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. Most higher plants have a minute diploid phase. Many fungi depend on plants for mineral absorption. If a lichen were sprayed with a chemical that blocked photosynthesis, it would probablydie. 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 conditions9Above 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.Explanation / Answer
19. Answer : False. It is only a characteristic of Gastropoda class of mollusks which includes snails and slugs including abalone, limpets, conch, nudibranchs, sea hares, sea butterfly.
20. Answer : False. Swim bladders help them in buoyancy
21. Answer : True. Sessile means "permanently attached" to the sea floor so they cannot move and feed by filtering or straining food floating in sea water.
22. ANswer : False. Carpels develop into the fruit where edible part from ovary and the seeds within are ovules.
23. Answer : False. 1 sperm nuclei unites with egg and other sperm nuclei unites with polar nuclei. Microspore mother cells are cells of the anther that develop into pollen grains.
24. Answer : True. Coenocytic fungi have a continuous cytoplasmic mass with hundreds or thousands of nuclei.
25. Answer : True. Segmentation allows specialization of body parts like appendages.
26. Answer : False. Only animals with distinct body cavities have brain.
27. Answer : False. The open circulatory system is common to molluscs and arthropods.
28. Answer : False. It can regenerate its arms.
29. Answer : True.
30. Answer : True. Amphibians have a 3-chambered heart.
31. Answer : True. Phloem carries nutrients from leaves to roots and xylem carries water from roots to leaves.
32. Answer : False. Sieve tubes are found in pholem to carry nutrients.
33. ANswer : False. Tracheids are found in xylem
34. ANswer : True.
35. Answer : False. Sponges lack tissue layers.
36. Answer : True.
37. ANswer : False.
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