Concept explainers
(a)
To distinguish:
Animals and other organisms.
Introduction:
Animals come under multicellular organisms having eukaryotic cells. They lack cell wall. They are heterotrophs, acquiring the carbon and energy source from the organic compounds built by other organisms.
(b)
To distinguish:
Vertebrates and invertebrates.
Introduction:
Vertebrates are the group of animals which acquires a backbone and spinal cord to support their body. Invertebrates are the group of animals which do not contains backbone.
(c)
To distinguish:
Protostomes and deuterostomes.
Introduction:
Protostomes and deuterostomes are used to classify the subkingdom Eumetazoa included in Animalia, on the basis of embryonic development of animals. In protostomes the blastopore develops the mouth, while in deuterostomes it develops the anus.
(d)
To distinguish:
Ectotherms and endotherms.
Introduction:
Ectotherm and endotherm in animal classification represents the thermal regulation by the animals. Ectotherms cannot maintain their body temperature as they lack internal mechanisms. Endotherms regulate their body temperature by generating heat from the
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BIOL:CONCEPT+INVEST.ETEXT
- Which of the following is an example of an animal that has true tissues, has a coelom, is triploblastic, and is a Deuterstome? Question 8 options: a) Echinodermata and Chordata b) Cnidaria c) Ctenophora d) Placozoaarrow_forwardThe distinction between sponges and other animal phyla is based mainly on the absence versus the presence of (A) a body cavity. (B) a complete digestive tract. (C) mesoderm. (D) tissues.arrow_forward1 explain the meaning of the following characteristics of animals a)triploblastic b)bilateral symmetry c)segmentation d) acoelomate e)cephalisationarrow_forward
- A previously unknown animal is being studied so that it can be classified. It is an invertebrate, triploblastic, dorsoventrally flattened, acoelomate, and has flame cells. Which phylum would you place it in? A)Arthropoda. B)Porifera C)Mollusca. D)Platyhelminthes. E)Cnidaria.arrow_forwardMatch the following:(a) Operculum (i) Ctenophora(b) Parapodia (ii) Mollusca(c) Scales (iii) Porifera(d) Comb plates (iv) Reptilia(e) Radula (v) Annelida(f ) Hairs (vi) Cyclostomata and Chondrichthyes(g) Choanocytes (vii) Mammalia(h) Gill slits (viii) Osteichthyesarrow_forwardIdentify 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.arrow_forward
- In vertebrates, what anatomical structure partially or completely replaces the notochord? 1.) lateral-line system 2.) cartilage or a bony skeleton 3.) endostyle 4.) dorsal hallow nerve cordarrow_forwardThe animal you are dissecting possesses several ganglia. Several are located at the head. Others are located at segments along a nerve cord. Under what phylum would this animal likely be classified? A)Echinodermata B)Platyhelminthes C)Cnidaria D)Arthropoda E)Molluscaarrow_forwardSuppose you discover a new species of animal that does not have body segments, but is triploblastic, coelomate, and cephalized. Under the molecular phylogenetic scheme, you would allocate it to which phylum? A)Platyhelminthes. B)Arthropoda. C)Nematoda. D)Mollusca. E)Echinodermata.arrow_forward
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