Phylum platyhelminthes Study guides, Class notes & Summaries

WGU C451/GNC2/1NC1 Integrated Natural Sciences Module 8 Already Passed Explain the concept of natural selection. It is a process where organisms with advantageous traits leave more offspring than organisms with other traits - causing populations to change over time. (key mechanism of evolution) variation traits vary from individual to individual heritable traits A trait that can be passed on genetically from parent to offspring. fitness the number of offspring an organism leaves over its life...

Phylum Porifera - ANSWER simple, sessile (permanently attached to one location) sponges; no tissues, organs, mouth or digestive cavity; filter feeders: flagellated collar cells line the large internal cavity and draw water into the sponge (food particles are strained out of the water current by the collar cells which pass food to other sponge cells); acolemate (no colon); no symmetry; most are marine Phylum Cnidaria - ANSWER class hydrozoa, class scyphozoa, class anthozoa; jellyfish, sea anem...

1 BROOKS BIODIVERSITY UNIT 3 EXAM | QUESTIONS & ANSWERS (VERIFIED) | LATEST UPDATE | GRADED A+ Plants Architecture Correct Answer: Plant needs i. collection & conversion of solar energy -> leaves ii. positioning & support of leaves -> stems iii. anchorage & absorption -> roots iv. transport -> vascular system Leaf Structure Correct Answer: Epidermis, Mesophyll, and Vein (Vascular Bundle) Epidermis contains what? Correct Answer: - Cuticle - Guard cells with Stomata ...

FTCE Middle Grades Science 5-9 Exam 406 Questions with Verified Answers Which of the properties listed below is a characteristic of a liquid but not of a gas? A. It has the ability to flow. B. It maintains its volume in an open container. C. Its molecules are constantly in motion. D. Its volume varies depending on temperature. - CORRECT ANSWER B A 0.100 m3 chamber is filled with oxygen gas at standard conditions (101 kPa at 273 k). Assuming ideal conditions and behavior, what will be t...

Which of the following is not an observation or inference on which natural selection is based? a. There is heritable variation among individuals. b. Poorly adapted individuals never produce offspring. c. Species produce more offspring than the environment can support. d. Individuals whose characteristics are best suited to the environment generally leave more offspring than those whose characteristics are less well suited. e. Only a fraction of an individual's offspring may survive. b. Po...

WSU Biology 106 Exam 3 Questions Marking Scheme Spongocoel - ANSWER- the large central cavity of sponges. water enters the spongocoel through tiny pores called ostia and it exits through the large opening called the osculum. spongocoel is lined with choanocytes which help to create a current in the water. Spicule - ANSWER- structural elements found in most sponges. They provide structural support and deter predators. Large ones are called megascleres while microscopic ones are ca...

Virulence deals with the consequences of a parasite on the hosts _________. a) anatomy b) behavior c) reproductive success d) physiology e) all of the above Which of the following is not a characteristic of Platyhelminthes? a) most are parasitic b) dorsoventrally flattened c) triploblastic d) pseudocoelomate e) all of the above Which of the following is not a class belonging to the phylum Platyhelminthes? a) Turbellaria b) Monogenea c) Cestoidea

Digenea female reproductive system Ans -ovicapt: sphincter muscle controls release of oocyte from ovary term-11 - Laurer's canal: vestigial vagina - Mehlis' gland: unicellular mucous and serous glands surrounding ootype - Ootype: expanded area of oviduct surrounded by Mehlis' gland - vitellaria: vitelline glands which produce bulk of shell material and yolk of the egg - Oogenotop: "egg forming apparatus" Characteristics of phylum Platyhelminthes... Ans *Flatworms* -Simplest bil...

NATIONAL OPEN UNIVERSITY OF NIGERIA COURSE CODE : BIO 207 COURSE TITLE: LOWER INVERTEBRATES Course Code & Course Title: BIO 207: Lower Invertebrates Course Writer: Dr. Patrick A. Audu Course Editor Programme Leader Dr. Ado Baba Ahmed National Open University of Nigeria, Lagos Course Coordinator Mr. Adams, Abiodun E National Open Univers...

Parasitism - Answer A symbiotic relationship in which one animal, the host, is injured through the activities of the other animal, the parasite. Parasites of medical significance belong to four phyla - Answer Protozoa, Platyhelminthes, Aschelminthes, and Arthropoda. Phylum protozoa - Answer Eukaryotic (unicellular) and have organelles that function in nutrition or locomotion. Trophozoites stage - Answer The growing stage of parasites; feed by engulfing particles and move...