Which type of tail is present in Scoliodon?

Q: How does the head of Dugesia move differently from the tail?

A: Dugesia (also known as planaria) is a genus of dugesiid triclads containing the common…

Q: Draw the structure of head region of cockroach?

A: Cockroaches are the insects belonging to the order Blattodea. These are generalized insects and do…

Q: Define the term diphyodont.

A: The suffix dont is used to describe teeth. So, the term diphyodont refers to specific pattern…

Q: How does paurometabolous metamorphosis differ from hemimetabolous metamorphosis?

A: The class of insects undergoes morphological and biological changes after birth through the process…

Q: Explain in detail the external characters of Scoliodon?

A: Class Chondricthyes includes the cartilaginous fishes. The fishes bear endoskeleton made up of…

Q: What is the significance of the notochord?

A: Chordates includes all animals containing a vertebrate or a backbone. Two groups of the…

Q: What is a nauplius? What is the difference between direct and indirect development in Crustacea?

A: The ear is divided into the inner ear, middle ear or ear canal and the inner ear. The outer ear…

Q: Explain the term thecodont and diphyodont.

A: The term dentition refers to the development of teeth and their arrangements in the mouth. In…

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: Explain the development of a feather?

A: The epidermal growths which form distinct outer covering or plumage in aves are known as Feathers.…

Q: Which of the following is not a synapomorphy of craniates?

A: Craniates are a group of chordates that includes many organisms that have a cranium or a braincase.…

Q: what was chracteristucs define the genus homo?

A: HOMINIDS:- Hominid are known as apes. This hominid belongs to the  Hominidae family includes a…

Q: Are any areas of the frog zygote more darkly pigmented than other areas?

A: Yes , the animal pole is darkly pigmented.

Q: What type of scale is found in Scoliodon?

A: Scoliodon is a marine shark , also known as Dog fish due to it's dog like protruded snout . Phylum…

Q: What is archegonium?

A: Archegonium is a female sex organ that is found in bryophytes, pteridophytes and most gymnosperms.

Q: Give the digrammatic representation showing V.S skin of lizard?

A: Lizard belongs to the class reptilia of kingdom Animalia. The body of a lizard is divided into head,…

Q: How can true seals be differentiated from the eared seals (sea lions and fur seals)?

A: BASIC INFORMATION SEALS  Their scientific name is Pinnipedia. There are around thirty- three species…

Q: What is the function of bud scales?

A: Vegetative reproduction (otherwise called vegetative proliferation, vegetative increase or cloning)…

Q: What are the features used to identify a male cockroach from a female cockroach?

A: Cockroaches are insects which also includes termites. They belong to kingdom-Animalia. About 30…

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: how did bat wings evolve from arms?

A: Evolution is the process of change in the features of an organism with time. It is based on the…

Q: Why is it important to know the sex of the frog? and why do we study the external features of the…

A: Frogs are the animals belonging to phylum amphibian. There as called so because they can survive on…

Q: What are three shared derived characters of deuterostomes?

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

Q: identify the common name of this animal's skull?

A: Skull is the bony structure present superior to the brain, it is the protecting shield that protects…

Q: Is there a respiratory pigment in the annelid blood?

A: The annelids are also referred to as the segmented worms. Some examples are leeches and earthworms.…

Q: What are the characterstics of mammals?

A: A chordate is a phylum which contains vertebrates like mammals, birds and some fishes and also…

Q: Is fecundation in mammalsinternal or external?

A: Fecundation, also known as fertilization involves the physical union of the male and female gamete…

Q: What is clasper in scoliodon?

A: Scoldion or the Dogfish belongs to the shark family.

Q: what is the symplesiomorphic character of deuterostomes? explain

A: The study of links between various groups of species and their evolutionary development is known as…

Q: What are the three ways sex is determined in reptiles? Briefly describe each.

A:

Q: Holometabolis refers to complete metamorphosis (True/False)?

A: The above-mentioned statement is true. Holometabolsim is a synonym for complete metabolism. It…

Q: Do female frogs have more pigmentation ventrally than male frogs? And does the maxillary teeth of…

A: Frogs are the organisms which belongs to the amphibian family of the vertebrate. It has a tendency…

Q: Give the digrammatic reprsentation showing a leeping frog?

A: Vertebrates have spinal cord which remain surrounded by bone or cartilage. Reptiles, birds, fish,…

Q: What are the external characters of Labeo?

A: Labeo belongs to phylum chordata and sub-phylum vertebrata. It belongs to class teleostomi. Its…

Q: What is the classification of the animal shown?

A: Animals are multicellular eukaryotic organisms that belong to the Kingdom Animalia. Every animal is…

Q: What type of centra does a tilapia have? what type of tail does a tilapia have?

A: Tilapia is a type of fish belongs to the family cichlidae . They are fresh water fishes found in…

Q: What are the typicalfeatures of mammals?

A: Vertebrates have spinal cord which remain surrounded by bone or cartilage. Mammals are vertebrate…

Q: Why scoliodon is known as dogfish?

A: The superclass-Pisces includes true fishes. It is the first true jawed vertebrate group. It is…

Q: What is the notochord?How is this structure formed?

A: Embryology is about the study of zygote and embryonic and organ development in plants and animals.…

Q: Discuss the adaptations of Labeo?

A: Fishes are gill-bearing aquatic vertebrate animals. The earliest organisms that can be first…

Q: What is the destination of the notochord in vertebrates and in protochordates?

A: A notochord appears in embryos as a small flexible rod made from cells from the mesoderm. It is only…

Q: Where are the spines/spinelets of Blue sea star located ?

A: Blue sea star belongs to the Ophidiasteridae family.

Q: What are the adaptations of Rana?

A: Rana is the genus name of the common pond frogs. Rana temporaria is one of the most common species…

Q: What is the difference between Labeo and Scoliodon?

A: Fishes are gill bearing aquatic animals that belong to the kingdom Pisces and phylum chordates. They…

Q: How is the dorsal lip of the blastopore similar to the primitive streak? How are they different?

A: Cell movements in gastrulation cause a major rearrangement of the embryo, transforming it from a…

Q: Draw and describe the different types of egg as to the concentration of yolk they contain. Give…

A: Almost all the female animals lay eggs of various species, such as birds, reptiles, amphibians, a…

Animal Phylogeny

Cladistics is a method of biological classification where organisms are classified based on their ancestors and their relationship with them. It is defined as the concepts and methods for determining the branching patterns of evolution and evolutionary history. Some scientists, however, have preferred the term phylogenetic systematics or phylogenetic taxonomy to emphasize the reliance on a phylogeny for classification. It is the most common and accepted method for classifying organisms.