Functioning Systems

What are the four characteristics that an organism must have to be considered multicellular? What is cell differentiation and why is it important for multicellular organisms? Sort the statements into either unicellular or multicellular Multicellular Many cells Eukaryotes Cells are specialised to preform specific functions required by the organism Functions are carried out at the cellular, tissue and organ system levels Macroscopic size Longer life span as work is divided efficiently between cells mostly sexual reproduction Only cells specialised for reproduction will reproduce (gametes) Unicellular Single cell Prokaryotes and some eukaryotes One cell carries out all the functions for life Functions are carried out by different organelles within the cell Microscopic size Short life span due Mostly asexual, clonal reproduction Whole organism is involved in reproduction Why are sponges and sea jellies considered to be tissue-less multicellular organisms? Match the specialised cell with its function Red blod cell carried oxygen around the body White blood cell protects against pathogens guard cell on outside of stomata - protects against water loss xylem cell transports water epidermal cell barrier and protection Describe an organ system in a vertebrate and describe how it supports the survival of the organism. What are the 2 types of vascular tissue in plants and their functions? How is it possible for the tallest tree to transport water from their roots to their uppermost branches, sometimes over 100m high? Which of the following will increase transpiration?-high temperature-high humidity-darkness-strong wind Explain how a tree is killed by ringbarking