Biology Study Set 13

Biology

Quiz 25 :

Animal Evolutionthe Invertebrates

Quiz 25 :

Animal Evolutionthe Invertebrates

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A nautiloid shell develops as a symmetrical series of ever larger chambers. Do some research and then write a brief report that correlates the functions of the chambers with the nautiloid life-style.
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Nautiloids are large and assorted gathering of marine cephalopods (Mollusca) having a place with the subclass Nautiloidea that started in the Late Cambrian and are spoken to today by the living Nautilus.
Nautiloids prospered amid the early Paleozoic time, where they constituted the principle ruthless creatures, and created exceptional differing qualities of shell shapes and structures. Nearly 2,500 types of fossil nautiloids are known, yet just a hand sized scoop of species get by to the present day.

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The animal groups called flatworms, roundworms, and annelids all include species that are parasites of mammals, whereas the groups called sponges, cnidarians, mollusks, and echinoderms do not. Propose an explanation for the difference.
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All flatworms have two-sided symmetry and smoothed bodies and inadequate digestive tracts. The level body state of a flatworm amplifies the surface region in contact with the earth.
The three groups of flatworms are parasitic flukes, parasitic tapeworms, and free-living flatworms. Annelids are paramount on the grounds that they circulate air through and treat soil. Doctors now and then apply parasites to evacuate abundance blood. Oligochaetes are utilized for angling goad and as soil conditioners.
Roundworms, otherwise called nematodes, are for the most part little, unsegmented worms with decreased finishes and a complete digestive tract. Illustrations of roundworms include: Ascaris, an intestinal roundworm; Trichinella, transmitted in uncooked pork; and Wuchereria, the reason for elephantiasis.
Sponges are the simplest animals belong to the phylum Porifera. Their bodies consist of masses of specialized cells embedded in a gel like matrix. Their body cavity is lined by unique flagellated cells called choanocytes, or collar cells.
The flagella of choanocytes draws water in through its collar made of small hair-like projections resembling a fence. This fence traps the food particles in the water, such as protists and tiny animals.
Cnidarians are habitat in marine water. They are few millimeter in length. Sea jellies, corals, sea anemones and hydrozoans are examples of cnidaria. All most all cnidarians are predators. They cause painful strings in humans.
Echinoderms are radially symmetrical and coelomates ; they have five arms or the regions of the body that project from the central axis.
Echinoderms are deuterostomes and most of the echinoderms have spines protruding out from the surface of their body, and they possess an internal skeleton, covered by a thin skin. They also possess water vascular system, which aids in locomotion.
The Sponges, Cnidarians, mollusks and Echinoderms can attack the humans and other animals with their stings, but they do not have the ability to grow in the humans (host). Thus, they are not considered under parasites of mammals. s

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Match the organisms with their appropriate descriptions. img
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Choanoflagellates are also known as sister taxon of animals. There are thirty to forty microvillus are present at the end of the anterior end of heterotrophic. Hence, this option is correctly matched up with
img .
Sponges are the asymmetrical animals. In these organisms many number of collar cells is attached to the matrix of the shell and forms a sheet. These organisms do not have organs and tissue and thus this option is correctly matched up with
img .
Cnidarians are the simple organisms which do not have any organs, but have two tissue layers. These are nematocyst producers. Hence, this option is correctly matched up with
img .
Flatworms are the simplest organ system and have some primary tissue layers which are named as ectoderm, endoderm and mesoderm. Hence, this option is correctly matched up with
img .
Roundworms are abundant animals. The body shape of the roundworm is cylindrical and these organisms have complete gut and false coelom. Hence, this option is correctly matched up with
img .
Annelids are species of bilateral animals. These animals include leeches, and some other organism such as earthworms. These are segmented worms. Hence, this option is correctly matched up with option
img .
Arthropods are also bilateral animals which have exoskeleton. The exoskeleton is in hardened and joined form. Hence, this option is correctly matched up with
img .
Mollusk has soft body and bilateral animals. These organisms have mantle which is extended over the complete body mass. Hence, this is correctly matched up with
img .
Echinoderms are the spiny skinned organism. The body of these organisms is covered with the interlocking spikes. Hence, this option is correctly matched with
img .

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You are diving in the calm, warm waters between a large tropical reef that formed around an island. You come across the branching soft coral shown in Figure 25.45 a. You observe that it grows only on the side of the reefs spine facing the island, not the side exposed to the open ocean. Develop a hypothesis to explain its one-sided distribution. How you would go about testing the hypothesis
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The ______ are coelomate and radial as adults.
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All animals ________.
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You are walking along a beach and see what looks like a shield with a spine sticking out from under it. You flip it over and see five pairs of legs. Is this animal in the same group as lobsters and crabs Or in the same group as spiders and ticks How do you know
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Flukes are most closely related to _______.
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In 2000, only 10 percent of the lobster population in Long Island Sound survived after a massive die-off. Many lobstermen think the deaths followed heavier spraying of the pesticides used to control mosquitoes that are vectors for West Nile virus. Speculate on why a chemical designed to target mosquitoes might also harm lobsters.
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Earthworm nephridia perform a function most similar to the _________.
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A coelom is a __________.
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Which group has the greatest number of species
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Cnidarians alone produce ________.
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