Define the following:-
(i) Spongocoel.
(ii) Choanocytes.
(iii) Ostia.
(iv) Mesoglea.
(v) Ectoderm & Endoderm.
(vi) Cnidoblast.
(vii) Nematocysts.
(viii) Paragastric cavity.
(ix) Coloblasts.
(x) Ciliary plates.
[Correct answer needed & will be marked as brainliest].
Answers
Answer:
hi snap pe aao na re
Explanation:
Read the extract and complete the activities given below. (12) I have been asked many summit, I did not think of who was going to be "first." I am sure that Hillary was not thinking that. Climbing takes all your attention. You have many more important worries. times, "Who was first?" When we were within reach of the What does it matter whether I reached the top first or Hillary? Our main thought was that both of us reach the top. We had to. One couldn't do it alone. If there had been a difference of one thousand feet between us, then one could make the claim that he was first. But even then, only the man behind him could confirm the distance between the two of them. When we reached Kathmandu we discovered that a controversy had arisen. We talked it over, Hillary, Colonel Hunt and I. We agreed that all the talk was childish. So we made a pact, and each of us signed it in the office of the Prime Minister of Nepal. Each one signed his own statement. I have a copy of Hillary's statement which I carry in my pocket. It reads: "Kathmandu, June 22, 1953." "On May 29th, Tenzing Sherpa and I left our high camp on Mt. Everest for our attempt on the summit. As we climbed upwards to the South Summit, first one and then the other would take a turn at leading. We crossed over the South Summit and moved along the Summit ridge. We reached the summit almost together. We embraced each other overjoyed at our success, then I took photograph of Tenzing holding aloft the flags of Great Britain, Nepal, the United Nations and India." (Signed: E.P. Hillary) There is another paper like this in English, signed by me. Thus, we will not take part in any controversy. As the statement says, Hillary and I embraced when we reached the top. We did as well as our bulky equipment would let us. I remember saying to him: "We have done it." But we couldn't hear. We had our oxygen mask on. A1. Global Understanding (2) Describe the opinion of Tenzing about the question- Who was the first?" A2. Complex factual (2) Rewrite the statement choosing the correct alternative. 1) The pact was signed in the office of the Prime Minister of India/Nepal. 2) Tenzing had a copy of his / Hillary's statement. 3) The two mountaineers did not care / cared about reaching first to the summit. 4) Tenzing held flags of India, Great Britain, Nepal and United Nations/United States of America. (2) A3. Interpretation Give the list of Tenzing's activities after reaching at the summit. (2) A4. Personal Response Give your opinion: We should participate in adventure sports because (2) AS. Language Study Do as directed 1) Tenzing and Hillary made a pact at the office of P M of Nepal. (Begin the sentence with -A pact) 2) Hillary and I embraced each other. (Use not only -----but also) A6. Vocabulary (2) Fill the letters to get meaningful words from the extract. Use hints given in the bracket. 1) s-m-i- (Top of the mountain) 2) c-l-n-1 (Post in the military) 3) p-c (Formal agreement) 4) e-b-a-e- (Held closely in one's arms)
Answer:
1)A spongocoel, also called paragaster, is the large, central cavity of sponges. Water enters the spongocoel through hundreds of tiny pores and exits through the larger opening.
2)any of the flagellated cells in sponges that maintain a flow of water through the body. A collar of protoplasm surrounds the base of the flagellumAlso called: collar cell.
3)An opening into a vessel or cavity of the body. 'The latter arise from the paranasal sinuses and protrude into the nasopharynx through the sinus ostia. '
4)Mesoglea refers to the tissue found in cnidarians like coral or jellyfish that functions as a hydrostatic skeleton. It is related to but distinct from mesohyl, which generally refers to tissue found in sponges.
5)Anatomical terminology. The ectoderm is one of the three primary germ layers formed in early embryonic development. It is the outermost layer, and is superficial to the mesoderm (the middle layer) and endoderm (the innermost layer). It emerges and originates from the outer layer of germ cells.
6)A cnidocyte (also known as a cnidoblast or nematocyte) is an explosive cell containing one giant secretory organelle called a cnidocyst (also known as a cnida ( pl. cnidae) or nematocyst) that can deliver a sting to other organisms.
7)nematocyst, minute, elongated, or spherical capsule produced exclusively by members of the phylum Cnidaria (e.g., jellyfish, corals, sea anemones).
8)1 : situated near the stomach. 2 : being the cavity or one of the cavities of a sponge into which the radial canals open and which opens outwardly through the cloaca.
9)Colloblasts are unique, multicellular structures found in ctenophores. They are widespread in the tentacles of these animals and are used to capture prey. Colloblasts consist of a collocyte containing a coiled spiral filament, internal granules and other organelles.
10)a locomotor organ consisting of a row of strong cilia whose bases are fused. synonyms: ctene. type of: organ. a fully differentiated structural and functional unit in an animal that is specialized for some particular function.
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