The coelom of most deuterostomes develops from outpocketings of the endoderm of
ID: 83430 • Letter: T
Question
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.Explanation / Answer
17. No. The coelom of deuterostomes develops by enterocoely in which the mesoderm outpockets from the walls of the archenteron (the primary gut or digestive tube that forms during gastrulation in the developing zygote) and hollows to form the coelom.
18. Not all. Gastropoda class of the phylum Mollusca, having assymetrical body, exhibit torsion. In torsion, the visceral mass, mantle and shell rotate 180° with respect to the head and foot of the gastropod.
19. No. Fishes use gas bladders to maintain buoyancy. They are also referred to as swim bladders. They help fishes swim vertically. They may be open type, where they are filled with air from the pneumatic duct or closed type, where they are filled with gas secreted into them from the blood vessels.
20. Sessile animals, though attached to a substrate for most of the adult part of their lives, may crawl or swim to good feeding sites. Some may filter plankton from water or feed on small prey.
21. No. A fruit is formed from a mature ovary and its associated parts.
22. Yes. It is part of the lymphatic immune system, filtering blood, removing old red blood cells, and storing platelets and white blood cells.
23. Yes, coenocytic or aseptate hyphae have many nuclei forming one long cell. They do not have septa between their nuclei. Example - fungi from the class Zygomycetes.
24. Yes. With each segment, new appendages developed for specific function.
25. No. Cnidarians (non-bilaterian) like jelly fish and corals, have nerves but no brain.
26. No. Molluscs have open circulatory system, where the blood is pumped by a heart directly bathing the tissues.
27. No. Starfish can regenerate lost body parts and can the whole starfish can be generated from small body parts.
28. No. Reptiles have gill slits during the embryonic stage of development.
29. Yes. Two atria and one ventricle. Example-frog
30. Yes. Phloem tranports nutrients both up and down through the plant.
31.No. Sieve tube members are found in phloem where they make up the sieve tubes.
32. No. They are present in xylem and conduct water.
33. Yes. By cohesion-adhesion tension (cohesion- water molecules sticking to each other and adhesion - water molecules sticking to walls of xylem vessels and tracheids) and transpirational pull (water evaporating from leaves through stomata in the day, creating negative water tension, water moves up from the roots.
34. No. Sponges, belonging to the phylum Porifera have no differentiated tissue layers.
35. No. In higher plants, the diploid phase is dominant, the diploid plant structure is called sporophyte which comprises the main plant.
36. No. Fungi obtain sugars from plant roots with plants depending on fungi for mineral absorption from the soil.