Adult members of this subphylum are sessile and possess only one of the chordate characteristics. Which one?

Q: Describe the structure of megasporangium in Selaginella.

A: Selaginella is the only living genus of the order Selaginellales, commonly known as ‘spike moss’.…

Q: What is direct development? Is there a larval stage in planarias?

A: Animal development starts with a fertilization of egg and it undergoes two types of development,…

Q: What are the anatomical advantages for simple animals in the chordata phylum?

A: There are four anatomical advantages for simple animals is that, when taken together, set chordates…

Q: Discuss the unique reproductive capacity of the bdelloid rotifer.

A: Bdelloid rotifers belong to kingdom Animalia and phylum rotifera.They are mainly found in freshwater…

Q: Compare the differences in sexual reproduction between Porifera and Cubozoans. How does the…

A: The important evolutionary step which happened with respect to the phylum cnidaria was the…

Q: Name the two classes of the phylum Anthophyta and discuss the differences between the two classes of…

A: Anthophyta is a phylum which produces seeds enclosed in an ovary. These are found in terrestrial…

Q: Flatworms have no coelom. Recent gene sequencing shows that their closest relatives are the rotifers…

A: Coelom is the fully functional body cavity that is lined by mesoderm. Within the coelomic cavity,…

Q: What indicates positive evidence of aquatic ancestry bryphytes?

A: Plants are the source of energy for many higher organisms that cannot prepare their own food. They…

Q: Describe asexual and sexual reproduction in Dryopteris.

A: Dryopteris is a plant genus that grows in tropical, subtropical and temperate regions of the world.…

Q: What character unites members of clade Gnathifera?

A: There exist different types of organisms that are placed according to the characteristic features…

Q: How can the features of the arthropod exoskeleton explain the terrestrial adaptation of some species…

A: The phylum Arthropoda is characterized by the presence of jointed legs, a segmented body, and an…

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

A: Chondrichthyes includes sharks, rays, and skates, as well as sawfish and a few fish species known as…

Q: What is phylum-echinodermata with its diagram?

A: The phylum Echinodermata belong to the animal kingdom. The members of this phylum have endoskeleton…

Q: Why is the madreporite of sea cucumbers internal instead of external like other echinoderms?

A: The madreporite  is made up of calcium carbonate and is covered in pores, looks grooved like some…

Q: What are Trochozoans ? Explain what do they play ?

A: The Trochozoa are a proposed Lophotrochozoa clade that is sister of Polyzoa. The trochozoans clade…

Q: identify the type of trichome present in: -Phoenix sylvestris -Cassia obtusifolia -Bauhinia anguina

A: Trichomes is derived from the Greek word trichoma which means "hair". Trichomes are specialized…

Q: Explain how Craniata are paedomorphic for some traits of Chordata larvae.

A: Hemichordates have a number of features that are common between them, chordates and echinoderms.…

Q: What physical feature is found on most free-living insects, including free living lice, that is…

A: Introduction: Insects can range in size from large—like the 130 mm bush giant dragonfly—to…

Q: Hemichordata is a small aberrant group which was earlier placed with chordata. Give reason.

A: Taxonomy is a branch of science involved with classification, particularly of organisms;…

Q: What features of Dugesia distinguish its head from its tail?

A: Dugesia are the common flatworms which are found in habitats of african, european, asian and…

Q: What are the ecological roles of hexapods and myriapods? Cite some examples of ecologically…

A: Introduction :- Ecology is the study of interaction among the living organisms and with their…

Q: What characters unite rotifers and acanthocephalans as members of clade Syndermata?

A: Animal phylogeny is a rapidly changing field for the biologists. Even if the members of animal…

Q: Difference between pseudocelomates and acoelomates?

A: Coelom is the chief body cavity of animals. It is present inside the body to surround and contain…

Q: What are the classes into which the phylum Echinodermata is divided?

A: Echinoderms are the marine organisms that belong to the kingdom Animalia. They are triploblastic…

Q: What phylum is the closest relative of nemertines? Why?

A: Nemertines:  Nemertea, sometimes known as ribbon worms or proboscis worms, is a phylum of organisms.…

Q: What factors support the placement of phoronids and brachiopods as sister taxa?

A: The tree phyla-Phoronida, Ectoprocta, and Brachiopoda-possess a crown of ciliated tentacles, called…

Q: What are some adaptive advantages of a pseudocoel compared to the acoelomate condition?

A: In animals the body cavity (coelom) is the area or free space that contains all the organs suspended…

Q: Describe some of the different hymenophore configurations found within the Boletales and also…

A: Within the fungal order Boletales, a fascinating array of hymenophore configurations exists, each…

Q: Explain diversity in male prothallus of pteridophyta.

A: Prothallus is the haploid gametophyte of which form the sex organ in pteridophytes.  Pteridophytes…

Q: Explain the process of fertilization in Selaginella.

A: Selaginella is the only life genus from the Selaginellales order and is generally referred to as…

Q: Describe the two invertebrate subphylum of the phylum Chordataand their relationship to the…

A: Classification is a method of grouping organisms into categories or groups based on similarities and…

Q: illustrates four key characters ofchordates: a notochord; a dorsal, hollow nerve cord; pharyngeal…

A: A chordate is an animal of the phylum Chordata. During some period of their life cycle, chordates…

Q: In terms of efficient reproductive strategy, which is better between articulate and inarticulate…

A: With exception of three particular taxa brachiopods are typically gonochoristic creatures with…

Q: List any three families of agricultural importance in the suborder Auchenorrhyncha and indicate why…

A: The suborder Auchenorrhyncha is also known by the name of Homoptera. The organisms belonging to this…

Q: Give an example of a highly polymorphic, floating, colonial hydro-zoan

A: An animal is any member of the kingdom Animalia. Generally, animals are characterized by a…

Q: Which of the following is not a characteristic of the phylum Chordata

A: The phylum Chordata is a group of animals that includes vertebrates (animals with backbones) as well…

Q: What are the two main subdivisions of the phylum Chordata?

A: Phylum chordata consists of animals that have a characteristic NOTOCHORD.  they are coelomates with…

Q: Differentiate between Phylum Porifera and Clade Eumetazoa. -Poriferans are only haploid during…

A: The objective of the question is to differentiate between Phylum Porifera and Clade Eumetazoa, two…

Q: What is the name of the larva of corals and sea anemones? What is the biological importance of that…

A: Corals belong to the class Anthozoa of the phylum Cnidaria.  They are marine invertebrates and are…

Q: what is the main morphological difference between the sengis and shrews

A: Sengis are  distantly related to elephants and are in a family of their own  Macroscelidea.

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.