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

EFFECT OF LIGHT INTENSITY ON THE GROWTH OF PLANT.

Extracts from this document...

Introduction

IB BIOLOGY HL CANDIDATE NUMBER- EFFECT OF LIGHT INTENSITY ON THE GROWTH OF PLANT. AIM: TO INVESTIGATE THE FACTORS AFFECTING LEAF SIZE IN WILD CHERRY PLANT 1. DESIGN: RESEARCH QUESTION: WHETHER THE LIGHT INTENSITY CAN INFLUENCE THE GROWTH OF THE LEAF OF WILD CHERY PLANT? HYPOTHESIS: My prediction is that plant exposed to/ growing in the region of bright light has a leaf with more surface area(longer and wider),compared to the one growing in a shaded area which would be shorter in length and width(lesser surface area), based on my knowledge that light is a factor affecting the growth of plants,thus in this case it would be a limiting factor for those plants in shaded areas. VARIABLES: A.)INDEPENDENT VARIABLE: In this case,the indepent variable would be the different area's/regions the plant is taken from,as one is taken from an area of bright light and the other from a shaded area. ...read more.

Middle

* Take a sample of 30 leaves from the branch of the bright area.(the sample has to be done randomly(some small leaves and some larger ones as well),take different sizes of leaves(length and width.)but from the same branch/tree. * Then measure and record the length and width in millimeters using a ruler of each leaf from the bright area. * Then calculate and record the surface area of each of these leaves by multiplying its length by its width and dividing the product by two. * REPEAT THE 2ND,3RD,4TH PROCESSES FOR THE BRANCH FROM THE WILD CHERY PLANT IN A SHADED AREA. * After that , compare both the findings/data of surface area-from the bright area and shaded area. * 2.DATA COLLECTION AND PROCESSING: 1.QUANTITATIVE RAW DATA: TABLE 1. PLANTS EXPOSED TO BRIGHT AREA:--- TABLE 2,PLANTS EXPOSED TO SHADED AREA: 2.AND 3)PROCESSED DATA AND PRESENTATION OF PROCESSED DATA: TABLE 3-AVERAGE(MEAN) ...read more.

Conclusion

II.)EVALUATES WEAKNESSES AND LIMITATIONS: AGE OF PLANTS(SAMPLES) MAY VARY, WHICH MAY BE A FACTOR AFECTING THE HEIGHT ,LENGTH ,ETC.AS BOTH SAMPLES MAY BE IN A DIFFERENT GROWTH PERIOD(AGE.) WE HAD ONLY SELECTED 2 SAMPLES(BRANCHES),SO THESE TWO SAMPLES MAY NOT GIVE A WHOLE PICTURE TO COMPARE HOW THE LIGHT INTENSITY AFFECTS ITS GROWTH. WE HAD ONLY SELECTED 1 SPECIES.-WILD CHERRY PLANT, AND THIS RESULT MAY VARY WITH DIFFERENT SPECIES OF PLANTS. III.)SUGGEST REALISTIC IMPROVEMENTS: NEXT TIME MAKE SURE THAT WE SELECT BOTH SAMPLES FROM THE SAME AGE GROUP/STAGE OF GROWTH. WE SHOULD ALSO COMPARE OUR RESULT WITH USING SOME OTHER SPECIES,NOT ONLY USING A WILD CHERRY PLANT INCLUDE MORE SAMPLES AS WELL,NOT ONLY 2 ,ONE FROM BRIGHT LIGHT, AND ONE FROM SHADED AREA , WE SHOULD TAKE ATLEAST 2 FROM EACH ,SO 60 LEAVES FROM BRIGHT AREA, AND 60 FROM SHADED AREA. ?? ?? ?? ?? ...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. Experiment Colours of Light (Wavelength) absorbed by green plant

    440 2.00 470 1.80 490 1.60 520 1.00 550 1.34 580 1.17 590 1.78 680 1.40 Table 7: Average percentage of absorption by spinach sample (%) Standard Deviation for the average percentage of absorbance of wavelengths by both mustard sample and spinach sample (With respect to standard solution at 0.00

  2. Environmental Factors affecting plant growth

    The root development of the plant will slow down and lengthwise they will be very small. Phosphorus plays an important role in plant growth. It is a very essential nutrient for plants as it helps in energy transfer and storage during photosynthesis.

  1. In this extended essay I am looking at the effect of different kind of ...

    All entirely matured seeds contain an embryo and, in most plant species some have stores of food reserves, wrapped in a seed coat. Some plants produce varying numbers of seeds that lack embryos, such type of seeds are described as empty seeds, and never germinate.

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

    Turn a three-way tap (the middle one of a three-way tap for closure) to the side of rubbing tube to close the way for water to enter 6. Push (not completely) the plunger to have all air bubbles go out 7.

  1. The effect of toliet cleaning products on E-coli ...

    dish with nutrient agar Material 5 E coli colony sachet Material 5 Bleach (sodium hydrochloride) Material 10mls Distilled water Material 500mls Methylated spirits Material 250mls King white Material 10mls Toilet duck cleaner Material 10mls Home brand toilet cleaner Material 10mls Harpic toilet cleaner Material 10mls 1.3.2- Safety aspects (table 3)

  2. Allelopathy. Open Investigation Will increasing the number of allelopathic sunflower plants effect the ...

    Some allelochemicals biodegrade over time and some allelochemicals continue to exist in the soil. Allelochemical concentrations in the producer plant may also vary over time and in the plant tissue produced. Due to the allelopathic substances retains many similarities to that of herbicides, allelopathic plants have been often used as "weedkillers".

  1. Carrot growth with differing wavelegnths of light

    These electrons are passed from chlorophyll molecule to chlorophyll molecule until they reach the reaction center of the photosystem where they are transferred to electron carriers in the thylakoid membrane (Allot 2007). This is where ATP production begins. Each time the excited electron passes from one carrier to the next

  2. Comparing the effect of different antimicrobials on the growth of E.coli

    of inhibition created onto the bacterial culture of Escherichia coli by equivalent concentrations of different antimicrobials has to be compared. Hypothesis A higher concentration of an antimicrobial has a stronger inhibiting effect on the growth of the bacterial culture of Escherichia coli.

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