Essays Tagged: "Leaf"

stomata distribution in a dicot leaf

nd compare the distribution density of stomata in the upper and lower epidermis of a dicotyledonous leaf.Stomata are the principle means of gas exchange in plants. Stomata are small pores they are con ... o enter the plant, and allow water and excess oxygen to escape. About 90% of water is lost from the leaf during transpiration.The number of stomata on leaf surface varies among different species. The ...

(4 pages) 34 0 4.2 Apr/2002

Subjects: Science Essays > Biology > Plant Biology

Monkshood (an endangered plant). It's common names, description and the plant's disease

early about three to four years for its hood shaped flower to bloom. Monkshood is an erect, slender leafy plant. Its leaves are toothed and deeply lobed. The upper two petals of its flower are conceal ... ed with many diseases. Fungi, Bacteria and Nematodes cause these diseases. Crown rot, Downy mildew, Leaf spot, Rust and Wilt are some of the diseases initiated by Fungi. Crown rot causes the plant to ...

(4 pages) 57 0 2.0 Oct/2002

Subjects: Science Essays > Biology > Plant Biology

Explain roots, stems and leaves in plants.

rowth of Stems: Production of LateralsWhen the meristem grows the cells divide and form tissues and leaf primordia which develop into leaves. The axil is the angle between the base of the leave and th ... at can repress the growth of lateral buds is apical dominance.LeavesThe beginning of a leave is the leaf primordium. Cells in the leaf primordium may divide and grow in many different patterns. The ce ...

(5 pages) 114 2 4.6 Jan/2003

Subjects: Science Essays > Biology > Plant Biology

Mangrove Analysis Report - Common mangroves; Structure of Mangrove forests; Mangrove herbal remedies; Functionment; Definitions; Ecological factors of export; Water salinity

ing, descriptions, and adaptation discussion for each specimen.Excoecaria agallochaAnalysis:·Leaf description: The leaves are alternate, simple, oval, and shorter than 10 cm; they have a shiny ... m is only effective against aggressors once they have learnt a lesson.Ceriops tagalAnalysis:·Leaf description: The leaves are a waxy yellow-green, shorter than 8 cm, opposite, simple, oval; the ...

(11 pages) 69 1 3.7 Apr/2003

Subjects: Science Essays > Forestry

Biology Coursework Analysis and Evaluation (transpiration)

lant at the beginning of the experiment water quickly evaporated. This is also due to the fact that leaf water is also needed to aid in photosynthesis and to stop the leaves from wilting. Transpiratio ...

(2 pages) 43 0 3.6 Feb/2004

Subjects: Science Essays > Biology

I found timelessness

ted towards the red-orange of autumn on a tree. At the very center of my concentration was a single leaf; a torn yellow-green, not even red yet. But it fell. I saw the precise moment of release - the ... yellow-green, not even red yet. But it fell. I saw the precise moment of release - the instant the leaf actually disconnected from the branch. It was the brevity of perfection. Partition in sunderanc ...

(1 pages) 16 0 2.3 Mar/2004

Subjects: Social Science Essays

An Investigation To Discover Whether Or Not There Is A Relationship Between Light Intensity And The Surface Area Of A Leaf.

stigation is to see whether I can find a definite relationship between the light intensity onto the leaf's surface and the surface area of the leaf.HypothesisI think the light intensity could affect t ... rface area in the following way:·A higher light intensity could make the surface area of the leaf larger.The reason I think a higher light intensity could make the surface area larger is the fa ...

(2 pages) 18 0 3.0 Mar/2004

Subjects: Science Essays > Biology > Plant Biology


tree - SA of leaves =200m"; - SA of spongy cells inside leaves = 6000m".gases diffuse straight into leaf cellswind replaces air round leavesGAS EXCHANGEGas exchange takes place at a respiratory surfac ... sely-packed spongy cells increase the area for gas exchange still further. You are expected to know leaf structure in the detail shown in the diagramGases enter the leaf through stomata -usually in th ...

(6 pages) 49 0 5.0 Apr/2004

Subjects: Science Essays > Biology

To investigate whether there is a difference in the frequency of stomata between green and white areas of leaves

ions.Apparatus:Nail VarnishSticky tapeLeavesGlass slidesMicroscope (x400 magnification)MethodTake a leaf from each species of plant, and paint onto the lower epidermis four sections of clear nail varn ... lace in areas of the leaves where chlorophyll is present. These areas are the green sections of the leaf, which look like this due to the green chlorophyll pigments. This means that photosynthesis doe ...

(12 pages) 41 0 5.0 Apr/2004

Subjects: Science Essays > Biology > Plant Biology

Response to Literature "The Fall of Freddy the Leaf" by Leo Buscaglia

Do you know what the life cycle is? In The Fall of Freddy the Leaf, the author, Leo Buscaglia, addresses the life cycle in the terms of a little, but very special ... e in life as other living things have their purposes.The simplicity of the seasons changing for the leaf is alike with the complex life cycle that humans and animals face. The seasons changed for Fred ... . This proves that there is still life after death and we will always be a part of it in some way.A leaf is but one, all alone in my hand. A simple thing such as a leaf has such complexities that many ...

(2 pages) 17 0 5.0 May/2004

Subjects: Literature Research Papers > North American

The Structure of Plants as Relates to Transpiration

edons, or seed leaves, and dicots, with two cotyledons. Monocots usually have parallel veins in the leaf, complexly arranged vascular bundles, fibrous root systems, and floral parts in multiples of th ... rous root systems, and floral parts in multiples of three. Dicots usually have netlike veins in the leaf, vascular bundles arranged in a ring, taproots (large, vertical roots), and floral parts in mul ...

(4 pages) 36 1 4.0 Dec/2004

Subjects: Science Essays > Biology > Plant Biology

Transpiration AP Lab

piration under different lab conditions, and3. study the organization of the plant stem and leaf as it relates to these processes by observing sections of tissue.ObjectivesBefore doing this la ... o blot off all excess water before massing.12. Calculate the water loss per square meter of leaf surface by dividing the water loss at each reading (Table 9.1) by the leaf surface area you cal ...

(8 pages) 36 0 1.0 May/2005

Subjects: Science Essays > Biology

The Action of guard cells.

Scattered throughout the leaf epidermis are pairs of bean-shaped cells, called guard cells . These cells contain chloroplasts ... cells contain chloroplasts, which are tiny granules filled with chlorophyll . Chlorophyll gives the leaf its green color. Chloroplasts enable leaves to carry on photosynthesis because they are able to ... sis, the food making process in which oxygen is released as a waste . This oxygen passes out of the leaf. At the same time, oxygen also enters the leaf, In order for the plant to carry on cellular res ...

(1 pages) 15 0 1.0 Sep/2005

Subjects: Science Essays > Biology


s.b. In C4 plants, bundle sheath cells as well as the mesophyll cells contain chloroplasts.c. In C4 leaf, mesophyll cells are arranged concentrically around the bundle sheath cells.d. C3 plants use Ru ...

(2 pages) 24 0 3.0 Nov/2005

Subjects: Science Essays > Biology > Plant Biology

Biology Lab Report on the Effects of Photosynthesis

ight, and label another 250-mL beaker dark. Half-fill the two beakers with water. Place a uncovered leaf to light, and both a entirely covered and a semi-covered leaf in the dark, in the appropriately ... h.4. Gently spread out the leaves in the Petri dishes. Add drops of Lugol's iodine solution to each leaf until iodine has come into contact with the entire leaf.5. Wash all glassware thoroughly. Dry t ...

(5 pages) 165 0 5.0 Mar/2006

Subjects: Science Essays > Biology > Plant Biology

Examining chloroplasts

icroscopeSlideElodea plantWater DropperCover slipLampMethod:1. prepare microscope and lamp2. take a leaf from the water plant and put it onto the slide3. put 2 drops of water onto the leaf4. carefully ... nd put it onto the slide3. put 2 drops of water onto the leaf4. carefully place cover slip over the leaf5. carefully study the leaf on a low magnification then work your way to higher magnificationsDi ...

(1 pages) 1909 0 1.0 Mar/2006

Subjects: Science Essays > Biology

Science Fair Idea and Abstract

(1 pages) 879 0 0.0 Oct/2006

Subjects: Science Essays > Biology > Plant Biology

E.e. Cummings

ntional punctuation could have been easily simplified by Cummings if he had only given us ("a leaf falls:/loneliness"). This way he would have conveyed the same message without the mystery ... tant human emotion that the poem produces. Looking deeply, you start to think of a gloomy day where leafs on your trees begin to fall. There is only one leaf singled out by this poem as one feels when ...

(2 pages) 908 0 0.0 Sep/2001

Subjects: Literature Research Papers


colors get washed away. In the spring hormones work together to make the leaves grow, in the summer leaf growth hormones slow down, and abscisic acid stops the leaf from growing. The decline in day le ... reezes and low temperatures in winter. Minerals, carbohydrates, and other nutrients travel from the leaf to be stored in the roots and the body of the tree over the winter. Conifers Survive harsh wint ...

(1 pages) 1196 0 0.0 Feb/2008

Subjects: Science Essays > Biology

Factors Affecting the Biotic and Abiotic features in the environment

and also how it lived there. Animal excretions and flowers etc. Were taken into account, as well as leaf litter. These results were put into table form.10.The temperature for the selected area was tak ... ry meter along the 30m belt transect.Meter (m)Description1•2 different types of grass•80% leaf litter and dead grass material•2 tiny toadstools•approx. 10 ants2•3 different ty ...

(12 pages) 14 0 0.0 Oct/2008

Subjects: Science Essays > Biology