1. Assignment 4.1.1 - Sponges<br />Part 1: Decide whether the following statements are true or false.<br />Sponges are plants. False<br />The water moves through the pores bringing microscopic particles of food to the sponge. True<br />When food, such as bacteria and very small plankton, are pulled through the sponge, it's called germ filtering. False<br />Spicules are hard particles that help form the body of the sponge. True<br />Spicules can be made of a variety of materials such as calcium carbonate, silica and spongin. True<br />Sponges grow very quickly. False<br />Once a sponge larva settles on a spot on the ocean floor or coral reef, it spends the rest of its life in the same spot. True<br />Humans use sponges for food nowadays. False<br />Part 2: Label the following diagram using the choices below. <br />PartsAnswersCollar cellA. Water flows out through osculum Water flows in through ostium B. Flagellum Flagellum C. Nucleus Spicule D. Epidermis (pinacocytes)Water flows out through osculum E. Collar cellEpidermis (pinacocytes)F. Water flows in through ostiumNucleus G. Archeocyte (amoebocyte) Archeocyte (amoebocyte)H. Spicule <br />