BIO 2135 : Cnidaria Key Words.doc

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ochrebat396

7 Mar 2012

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Aboral surface: in radially symmetric animals there is no anterior, posterior, left or right sides to the animal. In this case, it is the side opposite the mouth. Acontia: threadlike defensive organs composed largely of nettling cells, thrown out of the mouth or special pores of certain cnidarians when irritated (found at the base of anthozoan"s gastrovascular cavity). Anthozoa: include anemones and corals that have a polyp only life cycle. They are big and need to take in a lot of food (siphonoglyphs). Biradial symmetry: the organism appears radially symmetric but at least one set of structures is paired. This results in only two planes of symmetry that pass through the oral-aboral axis of the animal. Blastula: a stage in the development of multicellular animals in which only one cell layer is present, the blastoderm; the cavity the cells surround in the blastocoel.

Related Questions

1. A) Comparing digestion between sponges and cnidarians, what are the benefits of developing extracellular digestion in a gastrovascular cavity for the evolution of larger animals? B) A) Explain how bilateral symmetry contributed to motion, predation, cephalization (the evolution of a head and brain) and increased the diversity of animals.

maroonherring430

Chapter 9 Study Guide

Recognize and identify the 5 major grades of organization

Be able to know what a metazoan is

Know what parenchyma and the stroma are

Know the four ways in which animal body plans are different

Know the types of animal symmetry

Know the names of the embryonic germ layers, where they are located and what a diploblastic and triploblastic animal consists of

Be able to identify and/or label the regions of bilaterally symmetrical animals

Know the 3 planes of dividing a bilaterally symmetrical animal

Define cephalization and know its purpose

Identify the acoelomate, pseudocoelomate, and eu/coelomate body plans

Know the 2 ways in which coelomate body plans are formed

Differentiate between a protostome and deuterostome

Identify the 4 classes of tissues found in animal bodies

Know the term that means the study of tissues

Understand the major differences among the tissues and their location within an animal body

salmonwolf68

1. Two adaptations that land plants have for minimizing waterloss are _______ and ________.

2. Which of the following types of plants have the followingcharacteristics: originated 360 million years ago (mya), produceseeds that are not in specialized chambers, were abundant duringthe age of dinosaurs?

seedless vascular plants

bryophytes

angiosperms

gymnosperms

3. Not every angiosperm has invested in attractingpollinators.

True

False

4. It is a common misunderstanding that lichens are a singleorganism. However, lichens are actually a symbiotic association of_____ and _______.

5. Which of the following types of animals does not have radialsymmetry?

all of the above have radial symmetry

arthropods

molluscs