PLANT STRUCTURE AND FUNCTION

Major Parts of a Plant Leaves Seeds Flower Stem Root Where photosynthesis occurs Seeds Method of sexual reproduction Flower Site where reproduction occurs Stem Transports nutrients and supports the plant Root take in nutrients and anchor plant

Male Parts of the Flower Stamen- Makes up all male parts Pollen- Male sex cell, similar to sperm Anther- Sac-like structure on top of the filament Filament- Short stalk that holds the anther

Female Parts of the Flower Pistil- Makes up all female parts Ovules- Female sex cell, similar to the egg Stigma- Sticky part of the system, catches pollen Style-Tube that leads from the stigma to the ovary Ovary- Place where ovule is fertilized by the pollen, Turns into a fruit or seed coat

PROBLEM! IF THE CUTICLE BLOCKS WATER, WHAT ELSE IS PREVENTED FROM ENTERING/EXITING THE PLANT? C O 2 !!

Solution? STOMATA! Tiny pores in epidermis surrounded by two guard cells! Open during the day! Why? PS occurs during the day Transpiration necessary for cooling

Stems Transports food, water, and nutrients Supports the leaves and flowers

Plant Processes Photosynthesis Mixes light, water, and carbon dioxide in the presence of chlorophyll to produce sugar and oxygen Respiration Combines sugars and oxygen to give off water and heat Transpiration Loss of water through the leaves or stems Causes wilting when soil is dry

Animal Water Wind                                                     Dispersal of Seeds Gravity Wind Force