Many cephalopods have a structure found inside of their head called the "pen". Because cephalopods have a "pen", evolutionary biologists have concluded;

Q: examine the morphology of a millipede and a butterfly.  What characters do they share? Notice how…

A: As per the evolution of organisms, the organisms are divided into various phyla. These are a group…

Q: Most insects have wings. Which is the other animal phylum that contains creatures with analogous…

A: Insects is a class of Arthropods. Organisms of this class belongs to the subphylum Hexapoda and…

Q: Define cephalopods

A: Cephalopods are the animals that belong to the Phylum Mollusca. The typical examples of cephalopods…

Q: fishing net brings up a soft bodied animal with a coiled external shell. How can you determine…

A: Cephalopods are only found in the ocean, whereas gastropods are mostly found on land, with a few…

Q: In the deuterostomes the digestive tract (Gut) forms from the cells of the a) ectoderm b) nerve…

A: Deuterostome are type of division of animals in which blastula of developing embryo becomes anus…

Q: In tetrapods, the efferent nerves exit the spinal cord through the   Question 2 options:   A)…

A: A.ventral root

Q: Describe the following general characteristics can be used to distinguish among Animal phyla: a.…

A:

Q: How is the large size of some cephalopods related to the type of circulatory system they present?

A: Mollusca is the largest marine phylum of the animal kingdom that is characterized by a mantle with a…

Q: Mammals belong to a group of amniotes known as synapsids. Three major lineages of mammals had…

A:

Q: Distinguish between (a) radial and bilateral symmetry; (b) blastula andgastrula; (c) direct and…

A: (a) radial and bilateral symmetry -  Bilateral symmetry is where the left and the right sides of the…

Q: Define what are Cnidarians ? Explain the role of Cnidarians ?

A: Cnidaria is a phylum under kingdom Animalia containing more than 11,000 types of amphibian creatures…

Q: Which of the following is the correct classification for the following chordate animal: This animal…

A: Fishes  Fishes are aquatic Gill bearing animal belonging to the phylum chordata and sub phylum…

Q: Create a body plan table (Insert → Add Table) for the following animal phyla: Porifera, Cnidaria,…

A: Coelom can be defined as the principal body cavity that is present in most animals. It is located…

Q: Use examples to explain how the external morphology of cephalopods has changed over evolutionary…

A: Mollusca is the largest marine phylum of the animal kingdom that is characterized by a mantle with a…

Q: Explain how each molluscan feature is modified, compared to gastropod and bivalve body plans. 1)…

A: Cephalopods, Gastropods and Bivalvia are all classes of Molluscs. They differ in their habitats. For…

Q: The absence of muscle tissue in cnidarians primarily reflects...

A: The correct answer is option B: The presence of only two germ layers.

Q: Discuss the idea that every evolutionary adaptation has both advantages and disadvantages, using…

A: Cephalization is the development of ahead, where the sensory organs and the brain are organized.…

Q: Bilaterally symmetrical animals have________embryonic tissue layers, known as________ ,___________,…

A: The embryo undergoes various types of changes in order to form a developing fetus. During the…

Q: Aristotle classified all large, mobile, unshelled aquatic animals without a vertebral column as:…

A: The objective of the question is to identify the classification Aristotle used for large, mobile,…

Q: Arthropods are known for displaying "tagmosis", which means that arthropods have tagma. The tagma of…

A: Animals (likewise called Metazoan) are multicellular eukaryotic creatures that structure the natural…

Q: Unifying features include shell, mantle, radula, foot, visceral mass Which classes show a loss of…

A: Mollusca is the  second largest phylum of the invertebrate animals.  Answer;1    The mollusk (or…

Q: WORD FILL INS a) All chordates as embryos have the start of gills- what are these called? ____…

A: Vertebrates, tunicates, and lancelets are all members of the Chordates (Chordata) family of animals.…

Q: In vertebrates, what anatomical structure partially or completely replaces the notochord?  1.)…

A: Vertebrates:  Vertebrates are a subphylum of animals within the phylum Chordata. Vertebrates are…

Q: insect'

A: Insect are small animal with six legs, two pairs of wings and a body which is divided into three…

Q: Describe the development of the notochord. Include the terms primitive pit, notochordal process,…

A: The Notochord is a cartilaginous skeleton that supports the body in the form of a rod. It is found…

Q: Man appealed to the laboratory in Middle Asia. He lived in village in the pise-walled house and…

A: Ticks Ticks are small parasites belonging to the phylum Arthropoda, capable of causing various…

Q: Is the presence of myomeres a symplesiomorphic or synapomorphic feature of vertebrates compared to…

A: Gastrulation happens in the third week of human development. Gastrulation is one of the most…

Q: The evolution of different body plans in animals has led to a wide diversity of species. For…

A: Bilateral symmetry refers to the body plan where an organism can be divided into two equal halves…

Q: To what order does this animal belong (both animals belong to the same order)? This animal DOES NOT…

A: The picture shown above is of Caecilians. They are basically limbless amphibians, having cylindrical…

Q: this is dugesia  Compare the body plan of Dugesia and cnidarians. Aside from differences in…

A: Cnidarian and Platyhelminthes (Dugesia) are invertebrate animals that do not contain notochord and…

Q: Cephalopods are the only mollusks (with segmented bodies/have a mantle that secretes a shell/with a…

A: Mollusca are designated as the second-largest phylum of the animal kingdom after Arthropoda. They…

Q: Which of the following conclusions is supported by the diagram and the data table?  Number of cell…

A: The animal kingdom is the largest kingdom amongst the five kingdoms consisting of all animals.…

Q: Which statement about lungs and gas bladders is true? A) the first osteichthyans had lungs and these…

A: Hi! Since you posted more than one question, we will be answering the first question for you. If you…

Q: Which of the following is the correct classification for the following chordate animal: This is a…

A: Tetrapoda is a superclass under the phylum chordata. They are limbed vertebrates and include…

Q: In comparison with the most basal animal phylum, arthropods exhibit at least five major changes (new…

A: Arthropods (which means "joint-legged" in Greek) are a large group of invertebrates. Arthropods…

Q: Discuss how the circulatory system of cephalopods has been adapted to enable their active, predatory…

A: Cephalopods have a closed circulatory system and three hearts. They are the only molluscs with a…

Q: Based on an evolutionary perspective, do you think the present forms of cnidarians are the best…

A: Cnidarians are diploblastic organisms , they have organized tissue level, and digestion is…

Q: How do the presence/loss, form, and function of the radula differ within members of the Classes…

A: Mollusks are a diverse group of animals that have a wide range of uses for humans. Many mollusks,…

Q: Explain the relationship between the Vertebrata and these invertebrates.

A: The classification of phylum chordata is divide into three subphylum, i.e., Urochordata (Tunicata),…

Q: Which of the following is a synapomorphy for mammals? a)Lactation b)Limbs c)Circulatory system…

A: Evolution is defined as a slow gradual change over a period of time. It brings about the…

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.