How the charaacteristic features of aves are the presence of feathers?

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: Discuss the systematic position of Labeo?

A: The genus Labeo consist of more than 100 species around the world. It is the most diverse group.…

Q: What changes occurred in the surroundings of horses from Hyracotherium to Equus?

A: Evolution of horse traced back about 60 million years ago and they evolved from small woodland…

Q: What are zoonoses? Whatare some examples ofzoonoses transmitted bybirds?

A: Infection can be transmitted by vectors of reservoirs that carry the infectious agent in them. The…

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: What function other than feeding do suckers serve?

A: There are many organisms that have sucker which is a kind of attachment in the body. It is found in…

Q: what is the scientific name of stray cats? or house cats? and what is the common name?

A: Scientific names, otherwise called 'scientific nomenclature' are binomial expressions that comprise…

Q: What is meant by “genelocus”?

A: The basic fundamental unit of inheritance is called gene. They contain information that are needed…

Q: Explain in detail the Habitat and habits of labeo?

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

Q: Discuss nutrition and digestion in turbellarians?

A: Turbellarians refer to the organisms of the class turbellaria. This class is a primitive subdivision…

Q: What are some potential selective advantages of paedomorphosis?

A: Paedomorphosis is a phenomenon in which an adult organism retains larval or juvenile traits. The two…

Q: Which Platyhelminthes class lack teguments and why?

A: The classification of phylum-Platyhelminthes is based on the mode of life, i.e. Free living or…

Q: How to know if an Ascaris specimen is male or female?

A: They belong to the Phylum Nematoda of Animal kingdom. It consists of two main species Ascaris…

Q: Molecular sequence data indicate that Xenoturbella is a deuteros-tome. Are there corresponding…

A: In the living world, we see a large number of microorganisms, animals and plants. These organisms…

Q: What advantage might a prosthecate organism have in a verynutrient-poor environment?

A: Prosthecate bacteria are a non-phylogenetically related gathering of Gram-negative microbes that…

Q: Why the birds require parabronchi?

A: The respiratory system in aves is responsible for the oxygen delivery from the air and helps in the…

Q: Explain the molecular mechanism underlying the symptoms of Xerodermapigmentosum.

A: Xeroderma pigmentosum (XP) is an autosomal recessive disorder which is characterised by sensitivity…

Q: What two phyla are most closely related to theTenericutes?

A: Step 1 Tenericutes is a phylum of bacteria. The genera include Mycoplasma, Spiroplasma, Phytoplasma,…

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 is the nature of teeth in Petromyzon?

A: The Sea lamprey is also known as Petromyzon marinus. It is the parasitic lamprey. They belong to…

Q: Give three characteristics of lizard's death?

A: Lizards belong to the Class Reptilia and includes about 6000 species, which are cosmopolitan in…

Q: Is there any relationship among fish lice, bird lice, and land mammals, except that they are lice?

A: The living world produces a diversity of organisms and their various relationships which are between…

Q: how the food is taken in paramoecium?

A: Protozoa include a wide range of organisms most of which are free-living single-celled eukaryotes.…

Q: How was Nile Perch introduced to Ohio?

A: Nile perch is a large freshwater fish, belonging to the family Centropomidae and it is originally…

Q: What is the type of nitrogenwaste that mammalseliminate?

A: Nitrogen is a naturally occurring element which is important for reproduction and growth in animals…

Q: What is the oxygen requirement of Pseudo-nitzschia australis? And is it Aerobic or Anaerobic?

A: Aerobes and anaerobes An organism is said to be aerobic if it requires oxygen for its survival, and…

Q: What are the major evolutionary features that distinguish Phylum Platyhelminthes from earlier phyla?…

A: The phylum is defined as the taxonomic rank or classification level and placed below kingdom and…

Q: What is the scientific name of Pigeon?

A: The nomenclature is important because they allow people throughout the world to communicate…

Q: What is  Amphidiploid?

A: The ploidy of an organism refers to the number of sets of chromosomes present in a cell that also…

Q: What are the four major group of protozon?

A: Protozoans are microscopic eukaryotic unicellular organisms. Their nutrition may be saprobic,…

Q: How does cryptobiosis in tardigrades increase the likelihood of survival?

A: Water bears, called tardigrades, are the water-dwelling microscopic invertebrates.

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: Difference between peteropus and macropus?

A: The viviparous animals produce young one directly by developing them in the mother’s body. The…

Q: Bring out the differences between Scolodona and Rana regarding digestive tract?

A: BASIC INFORMATION SCOLODONA here it is mis-spelt as it should be written as Scoliodon. Scoliodon It…

Q: Do you find trunus artteriosus in shark's heart ?

A: Shark has a two-chambered heart. The circulatory system is single circuited because it does not have…

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

A: Blue sea star belongs to the Ophidiasteridae family.

Q: Mention one similarity between hydrach&Xerach secession?

A: Hydrarch succession refers to ecological succession of plants which begins in shallow water. In this…

Q: How is the ctenidium modified from the ancestral form in a typical bivalve?

A: Ctenidium is a comb-like structure with an axis consisting of rows of projecting filaments. It is a…

Q: Give a detailed systematic posistion of pigeon?

A: The branch of science that deals with naming, describing, and classifying various organisms is known…

Q: What makes a (domestic) pig be under the family "Suidae"? In other words, what are the…

A: The domestic pig, often called as swine, hog, is a large, domesticated, even-toed ungulate. It is…

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: The saber-tooth blenny mimics what other species?

A: Mimicry in biology is the similarity seen in one or more species with respect to physical…

Q: How can we differentiate Taenia saginata and Taenia solium eggs?

A: Taenia, commonly known as tapeworm, is type genus of the Taeniidae family of tapeworms which is a…

Q: In what ways are the life cycles of f6 and rotaviruses similar? How do they differ?

A: Here, f6 is a bacteriophage (bacteriophage is a type of virus that infects bacteria) and rotavirus…

Q: Identify what kind of trichomes does: -Cosmos bipinnatus -Mimosa pudica -Pandanus amaryllifolius…

A: Trichomes are aerial hair-like appendages on various types of plants, lichens, protists, and some…

Evolutionary lineages

An evolutionary lineage is a series of populations of organisms that descend from a common ancestor. Each species in the lineage is the direct consequence of evolutionary change from a common ancestor. A phylogenetic tree is generally used to display lineages visually. Lineages are components of the phylogenetic tree of life. Molecular systematics procedures are widely used to predict lineages.