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freshwater sponge, any of about 20 species of the genus Spongilla (class Demospongiae, siliceous sponges), a common, widely occurring group. It stays in place, sifting out plankton (microscopic algae and animals) from the water that passes through its body. FRESHWATER SPONGE (Spongilla lacustris): SPECIES ACCOUNTS PHYSICAL CHARACTERISTICS. Sexual reproduction involves formation of sperms and ova. General Characteristics of Sponges: Some of the general characters of sponges are listed below: 1. Exogenous budding is seen in case of Spongilla Organ system level iv. The Phylum Porifera may be defined as a sedentary, mostly marine, radially symmetrical, or asymmetrical, multicellular organism without definite organ systems. Sperm of one sponge reaches to the Ostia of another sponge and after developing inside the cavity, free-swimming larvae are born Ans: The structure of spongilla consists of ocular fringe, spicules, spongocoel, Ostia, bud and substratum. (a) Hydra (b) Spongilla (c) Plasmodium (d) Amoeba 28. ( a ) In meiocyte , chromosome number is diploid ( 2n ) while in gamete , haploid ( n ) . crown sponge or urn sponge. Reproduction occurs by both sexual and asexual methods.

Hylonema. Reproduction in Organisms solved mcqs. 3.25).Unlike marine sponges, freshwater sponges are exposed to far more adverse and variable environmental conditions; thus they have developed a dormancy mechanism. Suberites massa, Hymeniacidon perlevis, H. heliophila, Chalinula ecbasis, and Spongilla lacustris. iv. They become dormant during winter. 2.

It occurs by both asexual and sexual methods. Gemmules are helpful in. Symbiosis.

The development includes a free-swimming ciliated larval stage, the amphiblastula or parenchymula larva ; They have a great power of regeneration.


I. The water column conditions locally experience notable fluctuations across the year, mostly driven by biannual monsoon seasons. Further reproduction prohibited without permission. Concept Videos. Asexual by gemmules and sexual through an unusual free swimming larva characteristic of Spongilla . It is a genus of sponges found in the freshwater, slow streams and lakes, belonging to the family Spongillidae. Spongilla genus sponges stick themselves to the logs and rocks and filter the water for numerous smaller aquatic organisms including bacteria, protozoans, and other free-floating pond organisms. Biotechnology and its Applications. , 111 ( 2 ) ( 1992 ) , pp. Which animals have developed the capacity for regeneration? (1985) The development of Spongilla lacustris from the oocyte to the free larva (Porifera, Spongillidae). They reproduce sexually as well as asexually. 4. Gemmules formation in Spongilla. Then the sperm mother.

food-filled ball of amebocytes protected by protein and spicules, can survive in harsh conditions, used when environment goes bad. Thus In some sponges the sexes are separate. Development is indirect. form of Spongilla lacustris in New Hampshire.

The mesenchyme around the gastral layer of the flagellated chamber is Sexual reproduction is effected by the formation of the archaeocytes (specialized amoebocytes). ( a ) State the difference between meiocyte and gamete with respect to chromosome number . A sponge is the antithesis of a super hero. The movement of whiplike cells in the center of the sponge draws water through the holes and into the sponge. Response to Hostile environment Resistant to Dessication (Drying Watch Video in App Continue on Whatsapp. Join the 2 Crores+ Student community now! common bath sponge. 35. HABITAT-Marine, found 10-15meters deep in sea. Menomics or short tricks to learn Animal Kingdom for NEET class 11,12 Mnemonic: SpongesPores All Your Sides. But in most aquatic organisms like fishes, amphibians, etc. Life cycle events of new, larva-produced sponges of Spongilla lacustris and an unidentified species were followed from the time of metamorphosis in midsummer to late fall in the natural environment. that type of Asexual mode of reproduction in which one parental body of organism divides into two or more daughter cells is known as fission.

Although most sponges are hermaphrodite but cross-fertilization is the rule because eggs and sperms are produced at different times. Welcome to Spongell, where we create your self-care oasis. 10. These gemmules give rise to new organisms. For more information on phylum Porifera, its characteristics, classification and Porifera examples, keep visiting BYJUS website or download the BYJUS app for further reference. They reproduce by sexual and asexual mode. They become dormant during winter. (B) Sexual - Sponges are hermaphrodite, fertilization internal and cross fertilization (Protogynous condition).

All of these. 2. I. Phylum-Porifera belongs to the sub-kingdom Parazoa. Also Read: Sexual Reproduction. They reproduce sexually by Answered by | 16th Jun, 2014, 11:33: AM. flagella captures sperms and passes to ova developing in mesenchyme. (D) ornamental mollusc. The sponge possesses a high power of regeneration.

Reproduction asexual by budding or gemmule formation. Mode of reproduction - Asexual (Fragmentation) and Sexual (gamete formation). Multiple fission. Spongilla can reproduce asexually or sexually. Biomolecules-1. The mode of asexual reproduction such as gemmule formation, budding and fragmentation. Reproduction Bisexual or hermaphrodite animals. Salinity, temperature, and pH often reach extreme values, unsustainable for the majority of the marine fauna. 7Class 6Class 5Class 4Class 3Class 2Class NCERT SolutionsNCERT Solutions Class 12NCERT Solutions Class 11NCERT Solutions Class 10NCERT Solutions Class 9NCERT Solutions Class 8NCERT Solutions Class 7NCERT Solutions Class 6NCERT Solutions Class

( b ) Because the egg develops into a complete offspring without fertilization . Types of Asexual Reproduction: Asexual reproduction takes place in the following ways. Asexual reproduction occurs by budding, while sexual reproduction occurs via ova and sperms. 4. There are two types of reproduction : sexual and asexual. Spongilla: It is a freshwater sponge. Habitat: ADVERTISEMENTS: All sponges are aquatic, mostly marine, rarely fresh water (e.g., Spongilla), solitary or colonial, sessile (attached to the substratum).

Types of asexual reproduction. Annelida Arthropoda Mollusca This is covered by flat cells. cell undergoes divisions and spermatocytes are formed. Fertilization - Internal; Development - Indirect consisting of a morphologically distinct larval state. In Spongilla, budding is endogenous as a number of buds called gemmules are formed 2. choanocytes engulf sperm.

Spongilla is a genus of freshwater sponges in the family Spongillidae found in lakes, ponds and slow streams. Unlike marine sponges, freshwater sponges are exposed to f Can you explain this answer? Fertilization is internal. fresh water sponge. done Phylum Porifera Total Questions - 65. question_answer 1) A Chamber common to all types of canal system of sponges is called [CPMT 1973, 78; AFMC 1985] A) Paragastric cavity. 7 Common bath sponge is. In sexual reproduction, they reproduce by the cross-fertilization of male sperms and female ova. Phylum Porifera Reproduction Most have male and female sexual reproduction, some are hermaphroditic, all use internal fert., clitellum produces mating mucus Human Concerns Add nutrients to soil, aerate soil, supply food chains. Euplectella.

Spongilla lacustris have the ability to reproduce both sexually and asexually. Colony is profusely branched, exhibiting various shades of green colour due to the presence of green algae, called as Zoochlorellae, in the cellular system. In this process, a new individual is created from a bud or outgrowth due to cell division at one specific location of the parent body. (1) Penguin is homeothermic while the remaining three are poikilothermic Gemmule formation is a common mode of asexual reproduction in (1) Paramecium (2) Hydra

REPRODUCTION - ASEXUAL Exogenous Budding. Asexual reproduction through formation of gemmule occurs in spongilla. Spongilla belongs to phylum Porifera. They reproduce by sexual and asexual mode. The asexual mode involves budding. In this process, a new organism develops from an outgrowth or bud due to cell division at one particular site of the parent body. The growth form ranges from encrusting, to digitate, to branched, depending upon the quality of the habitat. Development Into Adult. When a parental body divides into many daughter organisms it is called Multiple fission. Q7 . Google Scholar Canavan, R. W. & P. A. Siver, 1994. 111: 7788. 1. (C) glass rope sponge. NEET UG Biology Reproduction in Organisms MCQs with answers available in Pdf for free download. C) Asexual reproduction occurs in spongilla by the development of gemmules. Read More. A sponge can be distinguished from other animals by the presence of. Multiple Choice Questions form important part of competitive exams and NEET exam and if practiced properly can help you to get higher rank. Although all the animals of Porifera are multicellular, the cells that make up the body do not form tissues and organs. In the same animal both male and female sex cells will develop. Spongilla is a genus of sponges in the family freshwater sponges.

SCIENTIFIC NAME-Hylonema COMMON NAME-Glass rope sponge DISTRIBUTION-Found along new England coast. in Biology. REPRODUCTION IN ORGANISMS . ( b ) Why is a whiptail lizard referred to as parthenogenetic . Examples: Sycon (Scypha), Spongilla (Fresh water sponge) and Euspongia (Bath sponge). Spongilla lacustris have the ability to reproduce both sexually and asexually. They become dormant during winter. The growth form ranges from encrusting, to digitate, to branched, depending upon the quality of the habitat. Spongilla lacustris is part of the class demosponges of the phylum Porifera. Reproduction Bisexual or hermaphrodite animals. Asked by Topperlearning User | 16th Jun, 2014, 09:33: AM. LIFE CYCLE EVENTS IN YOUNG, LARVA-PRODUCED SPONGES OF SPONGILLA LACUSTRIS AND AN UNIDENTIFIED SPECIES1 TRACY L. SIMPSON and JOHN J. GILBERT Department of Biology, University of Hartford, West Hartford, Connecticut 06117 and Department of Biological Sciences, Dartmouth College, Hanover, New i. 1. sperm enters pores of diff sponge. It stays in place, sifting out plankton (microscopic algae and animals) from the water that passes through its body. Coelenterates are marine and radially symmetrical animals.

Common genera are Spongilla (L. spongia, from Gr. Budding is seen in sponges, coelenterates, annelids and tunicates. Fertilisation - Internal Development Indirect having a larval stage which is morphologically distinct from the adult. 1) Fission 2) Budding 3) fragmentation 4) spore formation 5) regeneration 6) parthenogenesis 7) vegetative reproduction fission Asexual mode of reproduction. Spongilla belongs to the Porifera phylum. am. Life cycle and reproduction of Spongilla lacustris Trans. 4.

How it Happens: Each multicellular outgrowth called bud enlarges, develops the parental characteristics and then separates to lead an independent life. IDENTIFYING CHARACTERS- Rounded or oval body with a spirally twisted root tuft. Freshwater sponges are delicate in structure, growing as encrusting or branching masses.

Suberites massa, Hymeniacidon perlevis, H. heliophila, Chalinula ecbasis, and iii. Nov 17,2021 - Which of the following show asexual reproduction-a)sycon and Ctenoplanab)pleurobranchia and aureliac)Ctenoplana and pleurobranchiad)spongilla and ObeliaCorrect answer is option 'D'.

Usually yellowish brown in colour and comprised of numerous small individuals with a common flat [] Symbiosis. Life cycle and reproduction of Spongilla lacustris. hyalonema. Answer: Spongilla. Examples: Spongilla, Euspongia, Sycon PHYLUM Biomolecules-2. ASEXUAL REPRODUCTION IN SPONGES.

(A) Euplectella. Soc. Rhagon larva in Spongilla species are also seen. Cahong in Ha Long Bay (Vietnam) is a small lake with a reduced, invisible connection with the open sea. Life cycle events of new, larva-produced sponges of Spongilla lacustris and an unidentified species were followed from the time of metamorphosis in midsummer to late fall

Budding. Expert Answer: Gemmulation or internal budding is found in Spongilla. venus flower basket. Steps of sexual reproductions. Multiple Choice Questions on Phylum Porifera (Sponges) 1. They enter the spongocoel and are carried to the egg by amoeboid cells.

Phylum Coelenterata. Godzilla vs. Spongilla: A Contrast in Life Styles. Reproduction is by both sexual and asexual means. Sex organs are absent. Spongilla is a genus of freshwater sponge.

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The MCQ Questions for NEET Biology with answers have been prepared as per the latest NEET Biology syllabus, books and examination pattern.

Biodiversity and its Conservation. Get FREE solutions to all questions from chapter REPRODUCTION IN ORGANISMS.

Skeleton consists of siliceous spicules in form of network of smooth or spiny large and small oxeas (curved monaxons) embedded in the spongin fibres. Reproduction in Organisms IMPORTANT POINTS Reproduction is biological process in which organism give rise to offspring similar to itself. Sexual reproduction by fusion of gametes. reproduction They have the capability to reproduce asexually and sexually. Understand the each MCQ clearly by consistently practicing the Reproduction in Organisms Multiple Choice Questions and Answers for NEET and score well in your exams. Annelida Arthropoda Mollusca Vegetative reproduction in Pistia occurs by (a) stolon (b)offset (c) runner (d) sucker. Gemmules are the buds formed internally in sponges hence are called endogenous buds. Biotechnology Principles and Processes. In this process, a new organism develops from an outgrowth or bud due to cell division at one particular site of the parent body. spongilla.

Sperm: An 'archaeocyte enlarges in size and functions as sperm mother cell. These asexually-produced gemmules overwin-tered, but functional tissues did not. 3.25).Unlike marine sponges, freshwater sponges are exposed to far more adverse and variable environmental conditions; thus they have developed a dormancy mechanism. Which one of the following is a matching set of a phylum and its three examples? Pore Porifera All Spongilla Your Euspongia, Sides Sycon.

It is a common freshwater colonial sponge found usually attached to sticks or pieces of wood in lakes and ponds. Trans. Therefore, the biodiversity of the benthic | EduRev NEET Question is disucussed on EduRev Study Group by 158 NEET Students. 36. Show Answer (a) Porifera - Spongilla, Euplectella, Pennatula (b) Cnidaria - Bonellia, Physalia, Aurelia (c) Platyhelminthes - Planaria, Schistosoma, Enterobius (d) Mollusca - Loligo, Teredo, Octopus. Soc. Examples: Sycon, Grantia, Hyalonema, Cliona, Spongilla, Euspondia, etc. Animal of phylum Porifera are characterised by. Sexual reproduction occurs via ova and sperms. Hyalonema. GENERAL CHARACTERSTICS OF SPONGILLA. These organisms reproduce asexually by the formation of gemmules. Each sponge produces both egg and sperm. Animal Tissue. Formation of reduction bodies. All sponges are hermaphrodite. Fragmentation: It is that type of asexual reproduction in which the parental body breaks into Bird's Nest Sponge (Pheronema Carpenteri): Species Accounts ADVERTISEMENTS: In this article we will discuss about the structure of spongilla with the help of a diagram. An asexually created mass of cells, that are capable of developing into a brand-new organism or into associate adult fresh sponge is termed as a Gemmule. Obelia Choose the correct match showing the division of labour with animal example. 3. Answer : A. In a sexual reproduction single parent is involved and capable of producing offspring . 2. REPRODUCTION - ASEXUAL Gemmule : Internal Bud formed internally in all freshwater sponges and some marine sponges. Question 1. external fertilization occur. Life cycle, reproduction, and ecology of fresh-water sponges in a South Carolina pond.

Budding is a type of asexual reproduction in which one or more unicellular or multicellular outgrowths called buds are formed on or inside the parental body. Asexual reproduction in sponges is by. The sperms are released in the water. The exchange of gases and excretion is in the form of diffusion. boring (B) sponge resembling a flower basket. BEHAVIOR AND REPRODUCTION. Answer: sponge resembling a flower basket. (2000) Reproduction cycles and strategies of the cold-water sponges Halisarca dujardini (Demospongiae, Halisarcida), Myxilla incrustans and Iophon piceus (Demospongiae, Poecilosclerida) from the White Sea. Reproduction. Budding: It is that type of asexual reproduction in which one or more unicellular or multicellular outgrowths, called buds, are formed on or inside the parental body. 77 - 88 It feeds, grows, becomes an adult and repeats the process. Fission. Sponges are clumps of cells arranged around masses of tubes. Genus: Spongilla ii. Oocytes are produced inside the body and remain inside mesogloea waiting for fertilization. Spongilla is commonly found in freshwater that is usually colonial and attached to substratum like wood pieces in ponds. Sexual reproduction 26 Which coelenterate is called the portugese man of war? These are hermaphrodite and each sponge can produce egg and sperm.

Plus Two Botany Reproduction in Organisms Three Mark Questions and Answers. Reproduction. Microsc.

(a) Hydra, Starfish (b) Plasmodium (c) Earthworm (d) Spongilla. Examples: Sycon, Grantia, Hyalonema, Cliona, Spongilla, Euspondia, etc. They have sexual reproduction. spongos, sponge) and Myenia. Sponges like Fig: Sporulation occurs in (a) Plasmodium (b) Hydra (c) Starfish (d) Spongilla. Sponges reproduce asexually (fragmentation) and sexually.

They are omnivores. Chapter-1. Sponges of the genus Spongilla attach themselves to rocks, logs and sometimes to ground and filter the water for various small aquatic organisms such as protozoans, bacteria, and other free-floating pond life. Chemical and physical properties of Reproduction in Organisms is the first chapter in the unit Reproduction of class XII or class 12th Biology NCERT. The newly created bud divides and grows into a new cell. Which one of the following statements about all the four of Spongilla, leech, dolphin and penguin is correct? Sponges reproduce asexually (fragmentation) and sexually. Life cycle, reproduction, and ecology of freshwater sponges in a South Carolina Pond. Physalia 27 Sea anemone is known as Ereskovsky, A.V. Spongilla are hermaphrodite. Reproduction in Organisms, Asexual Reproduction.

Sexual reproduction: Sycon is a hermaphrodite animal. A sponge is the antithesis of a super hero. 3. sperm transferred to amebocytes. Freshwater sponges are most common in midsum- mer, although some are more easily found in the fall. A fresh sponge reproduces Spongilla. Larva of sponge is known as. Fertilisation - Internal Development Indirect having a larval stage which is morphologically distinct from the adult. Gemmules are an important part of sponges which are the internal buds and involved in asexual reproduction. The scientist R. Grant was used the term phylum-Porifera for the first time in 1836.
The Porifera may be defined as an asymmetrical or radially symmetrical multicellular organism with a cellular grade of an organization without well- definite tissues and organs; exclusively aquatic; mostly marine, sedentary, solitary or In living orgamism there are two types of reproduction. ova and sperms develop in the same individual. Am. Phylum Porifera (sponges) FYBSc Zoology MCQs - MCQues It occurs by both asexual and sexual methods.

These are mostly hermaphrodite and protandrous (male sex cells develop first). Canal system is rhagon type. Their sexual reproduction is similar to higher animals even though their body organization is primitive It is absent in the higher invertebrates and all vertebrates. 1. Sycon 16 What kind of reproduction do medusa undergo to form polyp? Last Answer : (d) Mollusca - Loligo, Teredo, Octopus. Reproduction is the process of producing offspring by an organism which is similar to itself. Later the nucleus of the parent yeast is separated into two parts and one of the nuclei shifts into the bud. Sponges reproduce both asexually and sexually and they also possess the power of regeneration due which it is almost impossible to kill a sponge. Spongilla belongs to phylum Porifera. Asexual Reproduction. B) A young shrimp pair gets entrapped in the sponge. Commonly known as fresh-water sponge. Answer:(b) budding They are little bud-like cells, that are fashioned by sponges to face up to unfavourable environmental conditions.

Examples: Sycon, Euspongia (Bath sponge), and Spongilla (Freshwater sponge).

REPRODUCTION IN FRESH-WATER SPONGES II.

Spongilla, one of 23 genera in the Spongillidae, attach themselves to rocks and logs and filter water for various small aquatic organisms, such as protozoa, bacteria, and other free-floating pond life (Fig. C) It symbolises the goddess of marriage. sexual reproduction. Classification of Hyalonema Kingdom: Animalia Phylum: Porifera 44. Show Answer (a) Hydra, Starfish. Most common method of reproduction in sponges is (a) binary fission (b) budding (c) multiple fission (d) sexual reproduction. The surface is covered with small holes.

sycon or scypha.

(1) Asexual reproduction and (2) Sexual reproduction. Phylum-Porifera: Definition, General Account, Identifying Characters, Examples. I. REPRODUCTION - SEXUAL Sycon. The life cycle featured gemmule hatching and functional tissue formation in the spring, sexual reproduction including the production of free-swimming larvae during the summer, and gemmule formation in the fall. There are two ways of asexual reproduction: gemmelae forming during hibernation and bud forming. A) Its basal root tuft and upper part symbolise the two sexes. Spongilla, one of 23 genera in the Spongillidae, attach themselves to rocks and logs and filter water for various small aquatic organisms, such as protozoa, bacteria, and other free-floating pond life (Fig. They possess a rhagon type canal system. They do reproduce sexually, but existing genotypes may also reappear annually from gemmules. Sexual Reproduction: Sponges are monoecious, i.e. Using patented technology and innovative delivery systems, we dispense our blend of high-quality moisturizers, botanicals, sea minerals, antioxidant, and anti-aging ingredients to create multi-use body wash infused buffers. Sponges reproduce asexually by budding, fragmentation and special asexual reproductive bodies called gemmules. Sexual reproduction happens in the summertime: the sponge gives birth to Reproduction takes place by means of (A) Asexual - By Budding - Special cell mass gemmules containing archaeocytes.Endogenous budding of asexual reproduction in sponge is known as Gemmulation. 3 ered this variation genetic, but Potts (1887) indicated it might be related to environmental conditions and Jewel (1935) found that the spicules of Trochospongilla pennsyl vanica and Spongilla lacustris varied and attributed these variations to differences in the silica and mineral content

6 Venuss flower basket is a. Which type of asexual reproduction is found in Spongilla?

Sexual reproduction: Some species of sponges reproduce sexually. Budding is the asexual reproduction through budding or gemmules formation. Some unicellular organisms shift to sexual method of reproduction , before the onset of adverse conditions, because- a)Sexual reproduction is a simple method b)it involves gamets c) Survival chances are more in D) It contains a sieve plate in the osculum region. Question 25 : Euplectella is a symbol of union till death because.

They develop into sperms. Examples: Sycon (Scypha), Spongilla (Fresh water sponge) and Euspongia (Bath sponge). The sex cells arise either from archaeocytes or choanocytes. In sponges, a part of parent body produces internal buds known as gemmule which separates from the parent body and forms a Which one of the following statements about all the four of Spongilla, leech, dolphin and penguin is correct? Asexual reproduction occurs by buds and gemmules. Spongilla. One sponges sperm reaches another sponges Ostia and development takes place inside the cavity to produce free-swimming larvae.

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