Which of the following feature is exclusively present in members of class Mammalia? 1.Pulmonary respiration 2.Oviparity 3.Mammary glands 4.Homoiothermy

Q: Read following statements w.r.t. cockroach and choose the option which correctly states true and…

A: Cockroaches are insects that belong to the order Blattodea. There are 4600 species of cockroaches…

Q: I. Determine the vertebrate where each part is present. Write the letter only. E. Snake F. Chicken…

A: Vertebrates  The organism whose spinal chord protected by bony or cartilaginous bone.

Q: Which statement is true of Spemann’s organizer?a. It is unique to amphibian embryos.b. It arises…

A: Answer is a.)  it is unique to amphibian embryos.

Q: Provide the (1) description and (2) adaptive significance of the following developmental and body…

A: A set of characteristics shared by a group of phylogenetically related animals at some stage during…

Q: Which of the following mammalian structures is derived from one of the extra embryonic membranes?…

A: Introduction An extraembryonic membrane is one of the membranes that aid in embryo development. Such…

Q: Reproductive characteristics and structures of sleected invertebrates and vertebrates. Fill in the…

A: Invertebrates and vertebrates are organisms classified on the basis of the presence of backbone in…

Q: What form of amplexus did you see with the Panamanian Golden frogs?

A: Amplexus  Amplexus is a type of mating behaviour in externally fertilizing animals.

Q: differentiate the frog testis and mammal testis.  Testis characteristics Frog Mammal 1.     2.

A: Although molecular clock dating suggests its break from other frogs dates back to the Permian, 265…

Q: At the end of the 3rd month (12th week) of intrauterine life one of the following is not yet…

A: Fertilization is the process by which the male gamete (sperm) fuses with the female gamete (egg)…

Q: In mammals, distinguish and differentiate the following germinal layers. Identify the organs that…

A: Introduction :- Mesoderm interacts with endoderm and ectoderm during organogenesis to give rise to…

Q: At what phase of development would a mouse embryo appear me similar to a chick embryo? Blastula…

A: THE STAGE OF DEVELOPMENTIS BLASTULA STAGE.

Q: of the following taxa i.e. Teleostei, Aves, Mammalia, and Insecta. Make a summary of the events that…

A: Gastrulation is outlined as associated early developmental|biological process} process within which…

Q: Which of the following statements about gastrulation is correct? A. During gastrulation, the…

A: The embryonic development after 15 days of fertilization marks gastrulation.

Q: Which of the following occurs to the blastocoel during Xenopus development?     is replaced by the…

A: Xenopus It refers to the genus of highly aquatic frogs that are mostly found in the regions of…

Q: Discuss the Distinguish the formation of cleavage snails embryos. 2. Distinguish the formation of…

A:

Q: Which of the following best describes the cloaca in nonmammalian adult vertebrates? O It is a…

A: Vertebrata is a phylum in which the animals have a vertebrae or vertebral column to support the body…

Q: Which of these becomes the gastrointestinal tract? mesoderm endoderm ectoderm all of the above none…

A: The Gastrointestinal (GI) structures are the structure amidst the mouth and the anus.

Q: Compare and contrast gametogenesis in starfish and sea urchin. Please make sure that the answer is…

A: Gametogenesis is a biological process that involves the production of gametes or germ cells in an…

Q: Describe the development of the notochord. Include the terms primitive pit, notochordal process,…

A: The Notochord is a cartilaginous skeleton that supports the body in the form of a rod. It is found…

Q: In what ways do a bull’s reproductive organ structures differ from that of the human? How are the…

A: The reproductive system(male and female) is a complex system with a number of interconnected…

Q: The ___________________ of an egg serves as an embryos water supply while the ____________ provides…

A: The correct option is C) albumen; allantois

Q: All of the following are true about humans EXCEPT: A. our zygote and early embryo cells have…

A: Introduction :- A zygote is a eukaryotic cell created when two gametes fertilise each other. The…

Q: 1. exhalant Females take up sperm through the siphon. 2. inhalant 3. internal The feeding strategy…

A: Females takes up the sperm through the - ? The males sperm leaves superbranchial chamber of the…

Q: In mammals, primordial germ cells migration ends when they reach the _________________   posterior…

A: Primordial germ cells (PGCs) are highly specialized cells that act as precursors of gametes, which…

Q: Choose the correct statement w.r.t. Periplaneta a.In female cockroach, sperms are stored in…

A: The American cockroach, Periplaneta americana (Linnaeus), is characterized by the largest of the…

Q: Which of the following statements is false? Hormones are excreted via tubes The pancreas is an…

A: Hormones are special chemical messengers in the body that are created in the endocrine glands like…

Q: What is NOT true about embryo development? A. a morula is an earlier stage than a gastrula B.…

A: Zygote is a structure formed by the fusion of male and female gamete. The stage of development of…

Q: Draw a diagram that includes the varlous characteristics of deuterostome development: bilateral…

A: Bilaterians are animals whose embryos show bilateral symmetry. That is the embryo is divided into…

Q: 8. The major event in the embryonic development of animals that results in a layered embryo is…

A: An embryo is the early stage of development of a multicellular organism. In general, in organisms…

Q: The visceral mass of gastropods take a 180 degree turn during development. This causes the anus to…

A: Parthenogenesis is the reproduction without actual meiosis and fertilization. It occurs in lower…

Q: Which of the following statements is false? a. Cadherins, but not integrins play a role in…

A: Fertilization takes place when the nucleus of the sperm fuses with nucleus of the eff. A zygote is…

Q: What is the importance of blastopore formation in protostomes? There may be multiple correct…

A: Blastopore formation further helps in gastrulation i.e formation of body cavity or it mainly forms…

Q: 1. In Deuterostomes, nutrient molecules (monomers) are taken into the space between the endoderm and…

A: Question -1. In Deuterostomes, nutrient molecules (monomers) are taken into the space between the…

Q: Which of the following is true about Sea urchin blastula formation and fate map? a) ectoderm that…

A: Sea urchins are spiny, round echinoderms in class Echinoidea. They show external fertilization and…

Q: In amphibian gastrulation, are there any evidences of cephalization? Why or why not? (mi

A: Gastrulation: During gastrulation, cell movements result in a massive reorganization of the embryo…

Q: The folding of ectoderm on the top of the embryo during organogenesis produces...? Group of answer…

A: In humans, the folding of neuro-ectoderm gives rise to one of the most important structure i.e…

Q: Which is not true of both platyhelminths and xenacoelomorphs Group of answer choices acoelomate…

A: Platyhelminthes are flatworms having many classes of triploblastic and are acoelomate flatworms that…

Q: Which of the following rows correctly identifies a difference between blastocysts and morula? Select…

A: In fertilized egg, the egg undergoes repeated cell division which occurs rapidly to form a…

Q: characteristics of __________________________. Hag fish Salmon Stingrays Both A and C…

A: Gills are the structures which are there to breathe. This character  is specially present in fishes.…

Q: What type of gastrulation is depicted from the diagram below? (A) Blastopore Blastopore 4A 4D 4c 4b…

A: The type of gastrulation depicted from the diagram is: Epiboly

Q: Which of the following is not true about avian eggs? Choose all possible answers. a. exhibit…

A: In development biology, cleavage is the process (following fertilization) that involves a series of…

Q: Draw a diagram that includes the various characteristics of protostome development: bilateral…

A: Protostomes belong from phylum invertebrate in which mouth originate prior to anus during the…

Q: A: Why do sea urchins have external fertilization? [Discuss the life style of the developing sea…

A: Introduction: We’ll answer the first question since the exact one wasn’t specified. Please submit a…

Q: What is the distinguishing characteristic of each stage in the embryonic development of the sea…

A: Sea urchins are the organisms that constitutes the external fertilization events in which they send…

Q: Which of the following is not true about frogs eggs and blastula formation? Choose all possible…

A: In the blastula stage of development , a blastula contains large yolk filled cells at the vegetal…

Q: Which of the following structures give rise to pharyngeal (branchial) arches cranial nerves O Neural…

A: Introduction :- Pharyngeal arches are two structures that grow on either side of the growing…

Q: The AMNIOTES are a group of tetrapod vertebrates which lay their eggs on land or retain the…

A: Amniotes are those group of vertebrates that lay amniotic eggs on land and the fertilized egg is…

Classification of Marine Organisms

Classification is a way of categorizing organisms that enables an easy process of identification of such organisms. All living things are classified by grouping them under specific categories. The grouping is done based on the close relativeness of the organisms. The classification tool requires knowledge of characteristics, differences, and similarities between different organisms.