How many tube feet would you estimate are on the oral surface of a sea star?

Q: How many germ layers originate the body of platyhelminthes? In relation to this characteristic how…

A: Platyhelminthes, also known as flatworms, are invertebrates having bilateral symmetry. They have an…

Q: Which are the germ layers present in cnidarians? Which tissues of the animal do they originate?

A: Cnidarians, also known as coelenterates are mostly marine organisms and includes corals, hydras, and…

Q: What is the difference between a cysticercus and one with an evaginated scolox?

A: Phylum Platyhelminthes amongst Kingdom Animalia is considered to be one of the primitive…

Q: What are the characteristics of the anamniotes which differentiate them from amniotes?

A: Amniotes are the vertebrate organisms that includes reptiles, birds and mammals. They are the…

Q: Are all of the organ systems fully developed in a free- swimming larva? Which organ systems are…

A: There are some major organ systems in the body of the animals. These organ systems have a specific…

Q: The shells of molluscs have 3 layers. Which is not one (nacreous/mantle/periostracum)?

A: All animals are classified according to their presence of characteristics such as characters,…

Q: What are the features of trabeculae?

A: The human body is a well built machine in which all the organs coordinate together to make it work.…

Q: Define acoelomate

A: Acoelomate are invertebrates that do not contain a coelom or a body cavity. The organisms belonging…

Q: Draw and label a tapeworm scolex and a mature ProgIotid showing the gonopore and uterus with eggs.

A: Tapeworms are invertebrates that belong to the phylum Platyhelminthes. They are widely distributed…

Q: Which cells give tentacles of Gonionemus their rough surface?

A: Phylum Cnidaria of the animal kingdom includes radially symmetrical organisms with two primary germ…

Q: What are three organs found in Platyhelminthes that were not found in Cnidari

A: Flatworms are more advanced than cnidarians. Cnidarians are diploblastic whereas Platyhelminthes…

Q: What is the role of cuticle of in the body of cockroaches?

A: Insects are the invertebrate organisms which are the largest group in the arthropoda phylum. The…

Q: . What features do all mollusks share?

A: Mollusk also spelled mollusc, is the second-largest phylum of soft-bodied invertebrate animals, with…

Q: View a dissected clam on the website. Make sure you can identify the mantle, the foot, the gills,…

A: 1.) Function of foot in clam is foot enables the clamp to borrow itself in mud or sand. 2.) Function…

Q: What is the excretory matter in scoliodon ?

A: Scoliodon is  cartilagenous fish which belongs to the phylum vertebrata of class elasmobranchii and…

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 does an entoproct differ from an ectoproct?

A: In crustaceans like crayfish, a sac like organ called statocysts occurs that opens to the surface by…

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: Draw an egg in its blastula stage and label the parts. What are its distinguishing charcteristics…

A:

Q: Name the organisms whose locomotory organ are tube feet.

A: Locomotion is the process of movement by organisms from one place to another. Plants lack locomotion…

Q: Explain syncytial blastoderm?

A: In most of the insects, superficial cleavage occurs in which the mitosis occurs without cytokinesis,…

Q: Nematodes and arthropods both (develop an anus from the blastopore formed during…

A: Nematode and arthropods fall under one same ancestor clade i.e. Ecdysozoa.  Nematodes are roundworms…

Q: Embryo above pictured here is a/an O A. blastula O B. gastrula O C. planula O D. zygote

A: Human embryonic development refers to the development of embryo. It involves the process of cell…

Q: What is the evolutionary advantage of the occurrence of sperm cells and larval stage in the life…

A: All sponges belong to Porifera. They are the simplest animals with cellular level of organization.…

Q: What are coelomocyte, identify their location and enumerate their functions?

A: Coelomocytes as the name suggests are the phagocytic leukocyte cells that are present in the coelom…

Q: All acoelomate bilateral animals have protonephridia. O True O False

A: acoelomates are bilateral animal that does not exhibit a body cavity. They are very primitive in…

Q: "What happens to the pronephric, mesonephric, and metanephric tubules in amniote?"

A: Amniotes are a clade of tetrapod vertebrates comprising of the reptiles, birds and mammals. Amniotes…

Q: Match each letter with the corresponding structure for letters A-E. -Sucker -Hooks -Uterus…

A: Tapeworm is also called as flatworms, comes under the category of platyhelminthes. This is a…

Q: Gonozoids continue the reproductive cycle by budding medusae. About how many maturing medusae are…

A: These are rare in number and only found around the hydrocaulus's base. The gonozooids are the…

Q: At which stage of embryonic development does the embryo have a blastopore?   Group of answer choices…

A: Embryogenesis is the development embryo which starts with the fertilization of egg cell with a…

Q: What are two features that put the octopus in the phylum Mollusca?

A: Mollusks are defined as a large group of invertebrates. They generally have soft body, also the…

Q: Which of the following are present in members of Class Cestoda? Select the correct response(s):…

A: They are morphologically characterized by a ribbon-like body composed of a series of segments called…

Q: The only members of Phylum Mollusca that have a radula are the gastropods (True/False)?

A: The radula is an anatomical structure used by molluscs for feeding. It is analogous to the tongue.…

Q: Draw a labelled diagram of the reproductive organs of an earthworm.

A: Earthworm is a terrestrial invertebrate belonging to the order Oligochaeta of the Phylum Annelida.…

Q: What is the Amphiblatula

A: Sponges such as Sycon are hermaphrodite animals. They undergo sexual reproduction. After…

Q: What is the clitellum of earthtworms and where it is located?

A: An earthworm is a terrestrial invertebrate found in the upper layers of the moist soil that is rich…

Q: Which earthworms have a clitellum?a). adultsb). juvenilesc). juvenile femalesd). malese). adult…

A: Annelids are included under the sub kingdom eumetazoa and is characterized by bilateral symmetry and…

Q: in eathworms, Is the clitellum located near the anterior or posterior end? What does the clitellum…

A: Annelida are segmented worms that live in saltwater, freshwater, and wet terrestrial environments.…

Q: What is zygotes ?

A: Fertilization is the process of combining gametes to create a new individual organism or offspring…

Q: How are the excretory systems of the three main arthropod classes constituted?

A: Arthropoda- These are invertebrate animals equipped with jointed appendages. It is the largest…

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: Define cellular blastoderm

A: The blastula is made up of a single layer of embryonic epithelial tissue called a blastoderm…

Q: What is the number of shells each organism has (Cephalopoda Scaphopoda)?

A: Shell or seashell is a hard protective layer formed by an animal that lives in the sea. Shell is…