What is the advantage of the countercurrent gas exchange in the case of some molluscs? Why is it not present in all representatives

Q: Four of the five features listed below are characteristic of cnidarians. Select the exception. a.…

A: Cnidarians is a phylum of Kingdom Animalia. In this phylum, aquatic animals are present which lives…

Q: 2.Why are Tuataras not grouped  together with lizards?what is the morphological character that…

A: As per our policy we are answering the only one question. For the rest of the question kindly…

Q: 1. If you disregard cryptobiosis, would you consider tardigrades successful? Why or why not?

A: Tardigrades or water bears may be terrestrial or aquatic in nature. By a phenomenon called…

Q: What are the major adaptations of Kinorhynchs that allow them to thrive in the interstitial…

A: Kinorhynchs Organisms belonging to the phylum Kinorhyncha are called kinorhynchans.  These are small…

Q: 1. What are the harmful effects of flatworm in man? 2. What phylum is the first to exhibit an…

A: Since you have posted multiple questions, we solve the first question for you. To get the remaining…

Q: 1. Phylum Ctenophora are believed to be offshoots of some medusoid cnidarian. Give 3 proofs that…

A: The three reasons are as follows :  Both have the gelatineous body

Q: 7. Myriapods, branchiopods and remipedes have all been considered possible sister groups to the…

A: Insects are pancrustacean hexapod invertebrates belonging to the class Insecta. They are the largest…

Q: 1. How do the larval forms of the trematodes and the cestodes differ? 2. How do their life cycles…

A: Cestodes and Trematodes are the two Classes of Phylum Platyhelminthes.

Q: Flatworms (platyhelminthes) possess a O A. metanephridial system B. protonephridial system O C.…

A: Flatworms are unsegmented organisms that are bilaterally symmetrical and are acoelomates. They have…

Q: 1. All hymenopterans have narrow waists. true/false 2. Trichopterans have scales on their wings.…

A: Answer 1st answer true 2nd answer false

Q: 1. Both Lepidoptera and Diptera have proboscis. true/false. 2. Phthirapterans have large claws…

A: Answer 1 :- True.   Explanation :-  The proboscis is an elongated, tubular structure that is used…

Q: 15. On the tree below, mark the place or places that three tissue layers have evolved in animals.…

A: ANSWER;- Homology is sharing of common ancestry and exhibiting similarity of structure and…

Q: 1. Describe the characteristics of members of the subphylum Crustacea.

A: Hello. Since you have posted multiple questions and not specified which question needs to be solved,…

Q: Develop a hypothesis that explains the origin of sponge skeletons (i.e. why did sponges develop…

A: Sponges are aquatic organisms which are multicellular and belong to the phylum Porifera. Their…

Q: 10. Which phyla has a notochord? Group of answer choices a.Porifera b.Chordata c.Nematoda…

A: option (b) is correct answer.

Q: 4) Mesoderm is found in: Annelids Protostomians Ciliates Bilaterians Sponges = Porifera Cnidarians

A: The organism are divided into two categories on the basis of germ layer: Diploblastic: They have…

Q: Discuss how starfish have radial symmetry but yet contain ganglia is due to their ancestors? 2. What…

A: Starfishes belong to kingdom Animalia. Starfishes are placed under the group called Echinoderms…

Q: 34.Though most gastropods are grazing forms , some are Sessile benthos . Select one : True False

A: Gastropods are under the phylum mollusca. The term gastropod means gastro=digestive system and…

Q: 13. Which of the following is true of coiling? A. is a counter-clockwise coiling of the visceral…

A: General features of mollusc.

Q: 1. Which of the following justifies the expansion of the allantois in shelled amniotes? * a. It…

A: The allantois is a respiratory organ that also functions as a reservoir for excreta. These…

Q: 4. The Malpighian tubules of insects     grind food into find particles before it goes to the…

A: *NOTE: Kindly repost for other questions. Dear Student as per the guidelines we are supposed to…

Q: Describe how the reproductive structures of each organism are adapted towards the given…

A: Answer of the questions given below...

Q: evolutionary adaptation of arthropods

A: Arthropods are animals with jointed appendages and a chitinous exoskeleton. They are adapted to live…

Q: phylum Annelida

A:

Q: 1. What are the major adaptations that allow nemertines to thrive in the marine environment? Support…

A: Adaptation: It is a process of evolution that allows any particular organism to be well suited for…

Q: 1. Would you consider annelids as successful in the terrestrial environment? Why or why not? 2.…

A: Annelids are the phylum of the animal kingdom that are are found nearly everywhere on earth. They…

Q: 18. 17- 16 15 14 19. 13 12 10 11 3 Frog Late Gastrula 5 7 .6 8

A: FROG LATE GASTRULA  Ventral  yolky endoderm  fertilization membrane fragment  Ventral lip of…

Q: 10. Name and explain four factors that may have contributed to the normous species diversity of…

A: Biodiversity refers to all the populations, species, and communities in a defined area and the term…

Q: .With reference to the thorax only, how do insects differ from other organisms.

A: According to guidelines we have to answer the first question only. So kindly please post remaining…

Q: 5. Describe four different uses for thoracic appendages seen in di crustaceans. Use specific…

A:

Q: Discuss the diversity of gas exchange you have observed in Arthropoda?

A: Arthropoda is largest phylum of the kingdom Animalia which includes insects. Word Arthropoda is…

Q: . Which of the following animals would most likely have bilateral symmetry and a high degree of…

A: Cnidarian are radially symmetrical and show low degree of cephalization. sessile animal lack…

Q: 1. Adult Ephemeroptera has stigma on its wings. true/false 2. Gracillariidae is a leaf-mining…

A: 1. Yes, it's true, they have pterostigma on its wings. Stigma or Pterostigma is a Dark ,more or less…

Q: 11. Which animals have stinging cells? Group of answer choices a.Cnidaria b.Arthropoda c.Mollusca…

A:

Q: What are the major considerations in the inclusion of some groups (previously with their own phyla)…

A: Annelids Annelids are organisms belonging to the phylum annelids. They possess a distinctive…

Q: Lancelets (Cephalochordates) feed on: O a Sea weeds (algae). O b. Bacteria and dead organic…

A: Lancelets or cephalochordates are a type of filter feeders.

Q: Cephalopods are able to swim for a sustained period Select one True False

A: Cephalopods are marine organisms that have a bilaterally symmetrical body symmetry and have a very…

Q: 33.Though most gastropods are grazing forms , some are Sessile benthos . Select one : True False

A: Gastropod are commonly called snail and slugs. Large number (near about 65000) of species are…

Q: What are the unifying characteristics of Gnathifera? Are these characteristics present in all…

A: Ahlrichs established the taxon Gnathifera based on morphological data. The Gnathostomulida and…

Q: 1. Account for the success of parasitic flatworms. Cite specific strategies to support your answer.…

A: Please follow step 2 for detailed explanation.

Q: 28. The octopus belongs to the class Cephalopoda of the phylum Mollusca A. True B. False

A: Q28. Octopuses are soft-bodied, eight-limbed molluscs that belong to the Octopoda order. Squids,…

Q: 6. In molluscs.the umbones are other. when they face each a. prosogyroUs b. opisthogyrous c.…

A: Mollusca is the second largest invertebrate animal phylum after Arthropoda, and its members are…

Q: 1. Define coelom. How is the coelom related to the hydrostatic skeleton?

A: Skeleton is the framework of bones. All animals possess skeletons, even invertebrates have hard…

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.