List the modifications that are thought to give some cetaceans the ability to (a) increase their swimming speed, (b) dive to great depths without suffering the bends, and (c) stay submerged for long periods.

Q: What is the main evolutionary novelty presented by annelids?

A: Lamarck coined the term Annelida for these ringed animals. He established this phylum as the first…

Q: In what ways do the genera Australopithecus and Homo differ?

A: Genetic evidence showed that about 7-10 million years ago, humans were evolved from chimpanzees. The…

Q: What is meant by homologous structures? What is meant by serial homology, and how do crustaceans…

A: The structures present in different organisms which are anatomically similar but functionally…

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

A:

Q: What are the characteristics of a female mud crab ( Scylla serrate) on its carapace?

A: Carapace is meant for the protection and it vary in size and is different in males amd female.it is…

Q: How are the 4 chordate synapomorphies evident in a tunicate larva and in an adult tunicate?

A: Although tunicates are classified as chordates, only the larval form possesses all four common…

Q: What feature separates the Chondrichthyans (sharks and rays) from the lobed-finned fishes? O some…

A: The class Chondrichthyes has two subclasses: the subclass Elasmobranchii (sharks, beams, skates, and…

Q: What internal structure does this animal use to bring in oxygen and release carbon dioxide? O A.…

A: Dolphins are mammals. They have three ear bones, and they have hair at some point during their life…

Q: How do the body coverings of fishes, amphibians, nonavianreptiles, birds, and mammals differ?

A: Body covering can be defined as the covering of the body or a body part. Skin is the body covering…

Q: Define about Fishes: Evolution of the Jaw ?

A: An aquatic vertebrate that bears gills for respiration and lacks limbs with digits is called fishes.…

Q: What makes hydra, planaria, salamanders, and fish so much better at regenerating than mammals?

A: Answer- Regeneration is the process by which an organism damaged or missing cells of the organisms…

Q: What advantage might a bilaterally symmetrical animal have over one that is radially symmetrical,…

A: Bilateral symmetry involves the organisms with body shapes and are mirror images along a midline…

Q: What similarities do birdsand reptiles share regardingexternal coverage,reproduction and excretion?

A: Birds are the warm-blooded vertebrate animals constituting the class aves. They are characterized by…

Q: What derived characters do sharks and tuna share? Whatfeatures distinguish tuna from sharks?

A: Pieces are true, jawed vertebrates with specific organs for respiration, excretion and blood…

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: Why can the amphibiancirculation be classified asdouble and incomplete?

A: The system which is primarily meant for the circulation of substances through body fluids is…

Q: name and describe the two main lineages within the protostome animals?

A: The kingdom Animalia breaks down into two subkingdoms, Parazoa and Eumetazoa. Parazoa includes…

Q: About how big are gastrotrichs, gnathostomulids, and micrognathozoans?

A: Gastrotrichs, gnathostomulids, and micrognathozoans are three groups of worm-like animals that are…

Q: Threespine sticklebacks that invaded freshwater lakes have lost their pelvic spines. What other…

A: Threespine sticklebacks (Gasterosteus aculeatus) are commonly found in the ocean. They are…

Q: How many anatomical characteristics do cetaceans share with mammals and fish?

A: Introduction: Those vertebrates that have a memory gland and give birth to the young ones instead of…

Q: What features differentiate animals from their nearest relatives?

A: The evolution of larger animals happened around 2000 million years ago when there was an increase in…

Q: How many common characteristics do cetaceans share with mammals and fish?

A: According to the question, we have to explain how many common characteristics cetaceans share with…

Q: the common ancestor of Cnidarians were an open-ocean jelly fish, what would you infer regarding the…

A: Cnidarians is a phylum which comes under the main classification animilia  They are aquatic animals…

Q: What is a body structure that is found in Bony fish but not in Cartilaginous fish?   Teeth Gills…

A: The animal kingdom is diverse constructing millions of species. Fishes are one group of vertebrates…

Q: Name two structures found in the gut of shark but not of frog ?

A: Digestion in shark takes place by digesting the food into a semi-liquid chyme.

Q: Given that modern echinoderms and chordates look nothing alike, what factors have led zoologists to…

A: Echinoderms are animals that belong to the phylum Echinodermata. They are recognized by radial…

Q: list the functiond of the mandibles, maxillae, and maxillipeds in crayfish

A:

Q: what do fossils tell us about the evolutionary history of the animal kingdom?

A: The traces or remains of an organism that once lived on Earth is termed as fossil. Fossils somehow…

Q: Which is the chordate classconsidered an evidence of thetransition of the vertebratesfrom the…

A: Evolution is a process of the change in the characteristics of a species over several generations…

Q: Why is ventilation important? Compare the morphological traits that enable ventilation in fishes…

A:

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: How can the endoskeleton of echinoderms be characterized in comparison to analogous structures…

A:

Q: What is the currently favored explanation for the evolution of vertebrate jaws?

A: The jawless vertebrates belong to the subphylum Vertebrata under the section Agnatha. The…

Q: How do Weberian ossicles increase a fish’s sensitivity to sounds?

A: Fishes are defined as the aquatic vertebrates that have gills and appendages in the form of fins.…

Q: What does radial symmetry means? What is the type of symmetry found in chordates? Which are other…

A: The animals are the most abundant living organism that is found in almost every habitat. They have…

Q: QUESTION 1:  What are the four distinguishing features of chordates?

A: Ans- The presence of a post-anal tail, a notochord, a dorsal, hollow nerve cord, and pharyngeal…

Q: What do fossil tetrapods tell us about the transition from water to land?

A: The animals that have 4 limbs are known as tetrapods and constitute the superclass Tetrapoda which…

Q: Based on anatomy, fossil, embryos, and DNA what are the closest living relatives of cetaceans, fish…

A: Cetacean, any member of a completely aquatic cluster of mammals usually referred to as whales,…

Q: Members of Chondrichthyes are thought to be descended from fishes that had ________. a. a…

A: Sharks, rays, and skate, as well as sawfishes and a few handful fish species known as chimaeras, or…

Q: If members of a group, such as chordates , evolved from a common ancestor then they should show…

A: The oldest discovered fossil of chordate is Pikaia gracilens belonging to cephalochordate. It is…

Q: How many gill slits are present in Scoliodon?

A: Scoliodon or shark belongs to class Chondrichthyes.  Their skeletons made up of cartilage rather…

Q: Describe how lobsters, crayfish and shrimp are similar?

A: The science of classifying and naming organisms, plants and animals based on their morphology,…

Q: What types of molecular and morphological changes occurred along the different branches that led to…

A: Answer: Introduction: Tetrapods (means four limbs) evolved from a group of animals called as the…

Q: Make a cladogram that includes the following groups of fishes: chon-drosteans, elasmobranchs,…

A: The cladogram is a diagrammatic relationship between species. But it didn’t represent an…

Q: The flexibility inherent in a segmented body plan was clearly important to crustacean evolution, but…

A: Evolution is the change in the heritable characteristics of organisms over successive generations.…

Q: How did the characteristic differences between aquatic and terres-trial environments influence the…

A: The basic differences that animal are required to accommodate while moving from water to land are…

Q: Why do you believe squid received the name cephalopod, which means head-foot? What distinguishes the…

A: Hi dear, here's your answer. The name cephalopod, in Greek, means that "head foot." This name was…

Marine Evolution

Marine habitat is less explored, and hence, its biological diversity is far less known. The marine habitats are not constant due to their shifting nature, while the terrestrial habitats are more stable. Marine biology is the science that deals with the study of diverse marine species, their interactions, and behavioral characteristics.