Concept explainers
To review:
The differentiation between radial symmetry and bilateral symmetry, protostome and deuterostome, and diploblastic and triploblastic.
Introduction:
Symmetry is defined as the repetitive body parts of plants and animals in a very ordered fashion. Different types of symmetry are exhibited by animals, such as asymmetry, radial, biradial, bilateral, and spherical. Depending on embryonic development, metazoans can be differentiated into protostomes and deuterostomes.
Protostomes are primarily primitive invertebrates, whereas deuterostomes include echinoderms and chordates. Germ layers are primarily layers of cells that are formed during embryogenesis. Some of the organisms have two germ layers and some have three and are diploblastic and triploblastic, respectively.
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Life: The Science of Biology
- An unidentified animal is noted to have simple tissues and possesses specialized cells called nematocysts. What is its overall body shape? Group of answer choices A. Asymmetrical B. Bilateral Symmetry C. Radial Symmetry D. Biradial Symmetryarrow_forwardWhat type of body symmetry does this creature have? Group of answer choices A. bilateral B. ribbitical C. none - asymmetrical D. radialarrow_forwardYou have received a number of embryos of a bilaterian animal from a colleague, who has asked for your help in determining the specific body plan of this animal. What type of symmetry is associated with the embryos that you received and why?arrow_forward
- Which of the following is not a member of the phylum Chordata? a. Cephalochordata b. Echinodermata c. Urochordata d. Vertebrataarrow_forwardList the predominant body plan (acoelomate, pseudocoelomate, or coelomate) for members of each protostome phylum and discuss how our picture of protostome evolution would change if each body plan were a homologous characterarrow_forwardWhich of the following correctly describes the cleavage pattern in reptiles, birds, and fish? A. holoblastic,isolecithal,radialB. holoblastic, mesolecithal, radialC. meroblastic, telolecithal, discoidalD. meroblastic, telolecithal, bilateraarrow_forward
- Identify and elaborate or briefly define the special features (or unique organ/s) of each of the following organisms: (a) echinoids (b) crinoids (c) holothuroids (d) ophiuroids and (e) asteroids.Limit your answers to 1 – 2 sentences per group of organisms. Fill out the table below for an easier presentation of answers.arrow_forwardIf you were to build a phylogenetic tree of living animals, which of the following derived characters would appear first? A. deuterostome development B. true tissues C. protostome development D. bilateral symmetryarrow_forwardCompare radial and bilateral symmetry, and provideexamples of animals that exemplify each.arrow_forward
- In terms of classification, what are the 5 unique characteristics that place animals in the Phylum Mollusca? B)Name one characteristic for each the mussel, chiton, snail, and squid that is unique to each of their respective classes.arrow_forwardDraw a skull of a mammal and identify which parts are the Chondrocranium or Nuerocranium, Dermatocranium and Splanchnocranium.arrow_forwardWhich of the following does NOT occur? radially symmetrical diploblast diploblastic eucoelomate protostomic coelomate bilaterally symmetrical deuterostomearrow_forward
- Concepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax College