• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

The tissues main that are found in a mesophytic leaf are epidermal tissue, vascular and ground tissue. The main part of a leaf is the blade of the lamina

Extracts from this document...

Introduction

Biology HL Unit 9 Plant science Yaw Appiah 2009/10/5 Mrs. Fowler The tissues main that are found in a mesophytic leaf are epidermal tissue, vascular and ground tissue. The main part of a leaf is the blade of the lamina; it consists of a large surface area for photosynthesis but is only 0.3mm thick it composes of four thin tissues of layers with veins at intervals. Leaves most important task is photosynthesis that why leaves are flat and wide. So the most important tissue in a leaf is the palisade and the spongy mesophyll. The epidermal tissue is the tissue that surrounds and protects the leaf. ...read more.

Middle

The stoma is situated at the bottom and it pore that allows carbon dioxide to enter and release oxygen. The guard cells are a pair of cells that opens or closes the stomata and controls transpiration of the leaf as it opens or closes pores. Vascular tissue is a complex conducting tissue; it is situated in the middle of the leaf. The tissue transport fluids and nutrients internally within veins and the primary components of a vascular tissue are Xylem and Phloem. Xylem is responsible for the transportation of water and minerals within the plant. It is also used to replace water lost during transpiration and photosynthesis. ...read more.

Conclusion

After the absorption of the water a plant called gibberellins is produced in the cotyledons of the seed. Gibberellin produces an amylase which creates a chemical reaction in digestion with the starch to make maltose in the food stores of the seed. The maltose is transported from the food stores to the growth areas such as the embryo root and the embryo shoot. Maltose is then turned into glucose which is then either used for cell respiration as a source of energy, or its used to synthesize cellulose or the other substances that is needed for growth. As soon as the leaves start to get sunlight, photosynthesis will be used to produce food and the food stores will no longer be needed. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our International Baccalaureate Biology section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related International Baccalaureate Biology essays

  1. Biology Extended Essay 2009

    2.3 Orange Juice from concentrate Method of processing Diagram 214: Shows a flow chart and steps of the process of concentrating orange juice. Freshly squeezed orange juice is sent through the centrifuge to discharge all pulp from the orange juice.

  2. Testing the effect of characteristics of leaves on the transpiration rate of * ...

    The thicker waxy cuticles can indicate the increasing hydrophobic. Then the transpiration rate increasingly slows down. About stomatal complex, it involves stomatal density, stomatal size, and stomatal index. All three aspects of it are different from species to species and thus have impact on transpiration rate of each species.

  1. The Effects of Salinity on Wheat Germination

    The experiment itself poses no great danger and it can be assumed that the safety, environment and possible costs should an accident take place are ? 3 meaning that there is an unlikely risk of an insignificant incident and/or a rare risk of a minor accident taking place.

  2. Identification of Organic Compounds

    Place on a hot plate and heat to boiling. 2. Using the following steps, test each of the substances in a table for the presence of reducing sugars. a. Number clean test tube 1 - 10 b. To each test tube, add 1 mL of substance to be tested c.

  1. Investigating the Effects of Salt on Seed Germination

    is affected by the concentration/percentage of NaCl, convincingly answering our research question. Due to this, I proved my hypothesis correct/valid as the 0.5% concentration of NaCl proved to germinate the highest percentage of seeds- germinating 90% of the seeds in its petri dish.

  2. Sleep is a normal part of human life. Investigate the neurobiological basis of normal ...

    Epidemiological studies on the relations between cardiovascular health and siesta have led to conflicting conclusions, possibly because of poor control of moderator variables, such as the physical activity. It is possible that people who take a nap/siesta have different physical activity habits, e.g., waking earlier and scheduling more activity during the morning.

  1. Finding the isotonic point for potato tissue

    With additional water, the potato cylinders gained mass. C : Between 0.32 M and 1.0 M, the potato sticks lose mass as the sucrose solution became more concentrated. The water particles leave the cells from the more dilute cell cytoplasm to the more concentrated sucrose solution by osmosis.

  2. Examine the correlation between soil moisture at different heights up the slope and the ...

    The independent variable being the variable that is changed in order to deduce whether there is a correlation between soil moisture and Bracken Fern leaf length. The soil moisture will be measured with the soil moisture probe, where it?s inserted into the soil of each of the 7 Bracken Ferns

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work