Mount Litera Zee High School Hayathnagar Class:4 Subject: Science Date:8-5-2020. Lesson: Adaptations in plants.

Answers of track your progress. a) Spongy bodies b) Top of the surface c) Waxy coating, absorbing excess water d) Submerged Answers of assessment zone. A bit) 1) a 2) c 3) b 4) a 5) d

B bit) 1) Cactus (All others are aquatic plants) 2) Lotus ( All others grow in hills) 3) Mango (All others grow in deserts) 4) Mangrove (All others grow in plains) 5) Palm( All others are floating plants)

C bit) 1) Tape grass 2) Spruce 3) Hollow stems 4) Roots 5)Water lily

Notes: Short question and answers. 5) Why do aquatic plants have spongy bodies? Ans) Floating aquatic plants have spongy bodies to make them light and help them to float on water. Long question and answers. 1) Take the leaf of an aloe vera plant and cut it. You will find a watery substance stored in the leaf. Which kind of habitat do you think aloe vera will grow in? Ans) Aloe vera is a succulent plant ( store watery substance in the leaf) like cactus. Hence these are adapted to desert habitat. 2) Differentiate between cactus plant and pine tree.

3) What is the difference between roots of mangrove and a floating aquatic plant? Ans) Mangrove trees grow in marshes. Their roots do not get air under the soil . So they grow above the soil to breath. But floating aquatic plants do not have roots and they float with the flow of water. 4) State two adaptations for the following types of plants. a) Xerophytes b) Hydrophytes Ans) a) Xerophytes: I) They have succulent stem, which can store large amount of water. II) The leaves are modified into thin and sharp spines which prevent the loss of water. b) Hydrophytes: I) They have spongy bodies filled with air. II) Fixed aquatic plants have long and hollow stems. 5) How do aquatic plants prevent damage from strong water currents? Ans) Aquatic plants have long, hollow stems with large air spaces, this soft and flexible stem prevent them from damaged by strong water currents.