model activity task of school education, Assignments of Environmental science

Download model activity task of school education and more Assignments Environmental science in PDF only on Docsity! MODEL ACTIVITY TASK CLASS – IX LIFE SCIENCE 1. Write the answer in complete sentence by choosing the correct answer for each question with respective serial number : 1.1 Identify the phylum whose members have Colloblast cells –– (a) Nematoda (b) Cnidaria (c) Ctenophora (d) Mollusca 1.2 Read the following statements and identify the correct one –– (a) The internal skeletons of the animals belonging to Class Chondrichthyes are made up of bones (b) The main plant body of Pteridophytes are gametophytic in nature (c) The body of animals belonging to the phylum Mollusca are segmented (d) The main plant body of Gymnosperms are sporophytic in nature 1.3 Select the pair that is NOT correct –– (a) Parenchyma tissue — Presence of intercellular spaces (b) Epithelial tissue — Presence of basement membrane (c) Sclerenchyma tissue — Presence of living cells (d) Nervous tissue — Presence of neurone and neuroglia 2. Decide whether the following statements are true or false: 2.1 Scientist Sydney Fox had termed the hot seawater mixed with various organic molecules as 'hot dilute soup'. 2.2 The cells present in the protists are prokaryotic in nature. 2.3 Nucleotide is composed of nitrogenous base, pentose sugar and phosphate radical. 3. Answer in two or three sentences: 3.1 " The body of the animals belonging to this phylum is composed of small ring-like segments." — name the phylum and write two of its characteristic features. 3.2 Mention three functions of endoplasmic reticulum. 4. Answer the following question: 4.1 Mention the location and two functions of liver in human body. Distinguish between xylem and phloem based on the following characteristics:  Components  Functions Students will write answers to these activity tasks in subject-specific exercise books at home, and submit the exercise books to respective subject teachers after schools reopen. Under no circumstance, students will go out of home.