Which of the following is a difference between Adapoids and Omomyoids?   A. Adapoids had a bony ear tube, while Omomyoids had an ear hole   B. Adapoids had claws, while Omomyoids had nails   C. Adapoids had a postorbital bar, while Omomyoids had a postorbital plate   D. Adapoids were mostly diurnal, while Omomyoids were mostly nocturnal

Q: What advantages favored the evolution of tapeworms’ long, flat shape?

A: Tapeworm belongs to the Phylum Platyhelminthes commonly known as flatworms. The organisms belonging…

Q: Which of the following is most closely related to lobsters and what characteristics are significant…

A: Lobsters are a group of crustaceans which are commercially important because they are consumed as…

Q: Echinoderms have _____ symmetry as embryos and _____ symmetry as adults. a. radial; radial c.…

A: The group of eukaryotic, multicellular, and heterotrophic organisms is classified under the kingdom…

Q: The nervous system of the Hydra is _______ _______ while the flatworm’s is ________ _________.…

A: Introduction In terms of biology, symmetry is referred to as the repetition of parts in animals or…

Q: Which group of flatworms are primarily ectoparasites of fish? a. monogeneans b. trematodes c.…

A: The flatworms come under Phylum Platyhelminthes and comprise a very diverse group of worms.  The…

Q: What are some possible ways that humans could mitigate the effects of cnidarians?

A: Cnidarians, which include species like jellyfish, corals, and sea anemones, can pose various…

Q: Which of the following groups includes all of the others? a. Protostomes c. Eumetazoans b.…

A: Taxonomy is that the observe of distinguishing completely different organisms, classifying them into…

Q: Suppose you find an animal that has a lateral line and a skeleton made out of cartilage. What class…

A: Every animal phylum poses some unique characteristics that are used for the identification of that…

Q: Which has a posterior flagellum that spits fluids that "burns" from its anal glands? A. Amblypygi B.…

A: Scorpions are the organisms that comes under the phylum arthropods in class arachnids. This are…

Q: Which of the following has a complete digestive system? a. tapeworms c. cnidarians b. sponges d.…

A: Digestive system is one of the systems in the body which carries out digestion. Digestion is the…

Q: Which of the ff. has a repugnatorial gland and coils into a ball when disturbed? A. Diplopod B.…

A: Various species under the arthropoda phylum are classified under Myriapoda. These possess multiple…

Q: 1. a) List 5 distinguishing factors of reptiles and their similar characteristics to birds. b) How…

A: Birds and reptiles are two different groups of animals that are quite different from each other yet…

Q: A. Which type of Armadillo belongs to the same phylum as Tityus? Give both the scientific name and…

A: In the living world, we see a large number of microorganisms, animals and plants. These organisms…

Q: What characteristics make a pig a chordate?

A: Chordate Chordates belong to the phylum Chordata. During some period of the life cycle of chordates,…

Q: Which of the following list places the important evolutionary innovations in the correct order of…

A: A phylogeny example is the evolutionary tree of organism demonstrating the history of animal organs.…

Q: The amniotes include all but the a. birds. c. mammals. b. reptiles. d. amphibians.

A: The organisms which have a fetal tissue called amnion are referred to as amniotes. It is found…

Q: How do primitive chordates like urochodata and cephalochordata; i. escape predators ii. How do…

A: Urochordata and Cephalochordata are two subphyla of the phylum Chordata. Both Urochordata and…

Q: Why are horseshoe crabs not crabs (or crustaceans)?

A: Crustaceans are essential for a group, or taxon, classified as arthropods. The fundamental passing…

Q: You are confronted with two creatures that, on first glance, both appear to be pill bugs. Upon…

A: An isopod crustacean belongs to phylum arthropoda with the exoskeleton made of chitin and joined…

Q: What is a key characteristic of all arthropods? a. Six legs c. Hydrostatic skeleton b. Pseudocoelom…

A: Arthropoda are invertebrate animals equipped with joint appendages. It is the largest phylum of…

Q: Poison glands of snakes are homologous to: A. electric organs of fishes B. stings of rays…

A: Among the given options, option (d)is the most appropriate. Poison glands are generally associated…

Q: Unlike bony fishes, amphibians havea. ears. b. jaws. c. a circulatory system.d. a heart.

A: The group of eukaryotic organisms that are heterotrophic and multicellular is called animals. There…

Q: Which group of crustaceans has all of these attributes: - sessile, strongly attached to substrates…

A: Introduction Any member of the Crustacea subphylum (phylum Arthropoda), a collection of invertebrate…

Q: How can aquatic arthropods have larger bodies than their terrestrial counterparts?

A: This question is based on the comparison between aquatic arthropods and terrestrial arthropods.

Q: All of these animals catch plankton with feathery things except A. Phoronid B. Ribbon worm C. …

A: A diverse group of organisms present in water that is carried by tides and currents is referred to…

Q: Which can be found in both the anterior and posterior regions of a nematode?    a. None among the…

A: Phasmids are present in lateral region. Sensory papillae are present on dorsal as well as ventral…

Q: Which of the following about caecilians are TRUE? Select one: a. They are legless, worm-like and…

A: Step 1 Amphibia is a class of first terrestrial tetrapods that lead a dual life in water as well as…

Q: All Gnathostomes have: I) mineralized teeth II) lung derivatives II) vertebrae O A. I & II B. I &…

A: Gnathostomes belongs to kindom- animalia, phylum- chordata. includes both cartilaginous & bony…

Q: Which of the following prevent large particles form entering the pharynx of ascidians? a. buccal…

A: Ascidiacea, also known as ascidians, tunicates, and sea squirts, is a polyphyletic class of sac-like…

Q: Pretend you see an animal at the ocean under a rock. It's 4 cm long. At first you think it might be…

A: The Hemichordate has a worm like body consisting of anterior proboscis, intermediate collar and…

Q: What is the closest common ancestor of the Allosaurus and Aves? A. Maniraptora B. Theropoda C.…

A: The cladogram presented here consists of four major clades which are Dinosauria, Saurischia,…

Q: What is the function of the arachegonium? O a. To carry out a sexual reproductive O b. To produce…

A: An archegonium is a multicellular construction or organ of the gametophyte period of specific…

Q: Which of the following factors allows plethodontid (lungless) salamanders to survive and thrive…

A: Introduction :- Ectothermic refers to animals that regulate their body temperature by absorbing heat…

Q: Which is INCORRECT about sea urchins? A. Spines are movable B. Secondary spine is shorter a d solid…

A: Sea Urchins are echinoderms having a spiny outer structure.  They move with the help of tube feet…

Q: Match the benefit to the correct chordate adaptation. (match each number to the correct letter)…

A: Evolution is a continuous process and we are still evolving. Evolution is nothing but adapting to…

Q: Differentiate the following based only on their general external anatomy: Beetles versus True Bugs

A: Insects are invertebrates that do not have a backbone or skeleton inside. They have a hard outer…

Q: What is the mot distal part of a crinoid that is associated with feeding? A. brachige B. Pinnules C.…

A: Crinoids are marine animals belonging to the phylum Echinodermata and the class Crinoidea.

Classification of Marine Organisms

Classification is a way of categorizing organisms that enables an easy process of identification of such organisms. All living things are classified by grouping them under specific categories. The grouping is done based on the close relativeness of the organisms. The classification tool requires knowledge of characteristics, differences, and similarities between different organisms.