3 constute 60 of nal course grade

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: CAL/FAMILY BEREAVEMENT EMERGENCIES ARE ACCEPTABLE EXCUSES FOR MISSING EXAM –  no other excuses accepted –  Prac<ce ques<on set posted –  see BB for TA review session <mes determinate vs. indeterminate growth •  growth des<ned to form a terminal structure (e.g. leaf, flower) = determinate –  programmed, ends with differen<a<on into non- dividing cell types •  indeterminate –  in meristems –  undifferen<ated cells persist while new roots and shoots grow •  contain poten<al to develop into all root and shoot structures Indeterminate growth Box Huckleberry in PA covers 10 sq mi and may be over 13,000 years old secondary growth •  is a dicot characteris<c –  depends on func<on of vascular cambium and cork cambium, which are not present in monocots –  cork surrounds stems and roots •  waterproofing •  few monocots have thickened stems –  e.g. palms –  use a different mechanism for this growth rings of annual growth are most prominent in temperate trees pith: spongy perenchyma cells func<on in storage leaf anatomy Leaf Cross Sec<on Plant nutri<on •  Common nutrients (easy for plants to obtain) –  Carbon –  Hydrogen –  Oxygen •  More precious nutrients (obtained) from "soil solu<on" as ions –  Sulfur –  Phosphorous –  Magnesium (needed in Chlorophyll) –  Iron (needed in cytochromes) Plants are... •  photoautotrophs –  but some plants rely on bacterial chemolithotrophs to provide nitrogen and sulfur •  sessile –  unlike sessile animals, which use moving water to bring food to them, most plants need to use growth as their movement •  microenvironments very important –  defined by availability of nutrients and light –  some good, some bad, preven<ng survival/growth macro- and micronutrients •  Macronutrients - needed in concentra<ons of >1 g /kg dry weight •  Micronutrients - needed in < 100 mg / kg dry weight •  (aside: what is dry weight and how do you measure it?) How to tell if a plant is deficient in a mineral nutrient? •  N deficiency = most common •  N is almost always limi<ng for plants growing in nature •  N is needed for chlorophyll; N deficient plants are deficient in chlorophyll pigment; yellow (carotenoid pigments) is seen (normally masked...
View Full Document

This note was uploaded on 10/02/2013 for the course BIO 201 taught by Professor True during the Spring '08 term at SUNY Stony Brook.

Ask a homework question - tutors are online