# What Effect Do the Different Levels of Ecb Infestation of the Bt and Non-Bt Corn Have on the Yields?

1992 Words Oct 8th, 2008 8 Pages
Biology IBO
Group 61
Teacher: Lorena Isabel Garza Hinojosa
Student: Angélica López Hernández ID: A01211745
Due Date: 19/08/2008
Dependent and Independent Variables

Problem Statement:
How different wavelengths of light affect the rate of photosynthesis?

Variables:
* Dependent: wavelength of light (color)
* Independent:
* Control:
Method for controlling variables:
All types of corn must be grown in the same soil and nutrient conditions, watering amounts and light conditions. They must be grown in separated plant chambers, and the seeds will be planted in three pots and each grow chamber will be labeled. The amount of ECB that is added to the plantation must always be in the same quantity corresponding to
5. Weighing: Drag each ear on each of the plants to the weighing dishes to weigh its kernels. The yield of kernels of each plant is now on a weighing dish. Drag a weighing dish to the balance to read the weight of the kernels. Record the weigh of a Data Table. Proceed to weigh the kernel yield from all plants. Calculate the average kernel yield form each set of three identical plants that are grown under identical conditions from the same type of seed. Record the calculations on the Data Table.

Method for collection of data
The yields of each experiment must be weighed on the same weighing dish, and the results must be measured in a labeled table considering four significant numbers. The unit that must be used is grams. Uncertainty will be considered as half of the minimum weight that can be measured on the balance (¬ - + 0.05).

Data collection
CORN VARIETIES AND YEILDS
CORN VARIETY LEVEL OF ECB INFESTATION GROWING POT 1 YEILD (GRAMS) GROWING POT 2 YEILD (GRAMS) GROWING POT 3 YEILD (GRAMS) AVERAGE YEILD (GRAMS)
UNCERTAINTY + - .O5 (GRAMS)
BT 456 HIGH 157.30 157.00 159.00 157.77
BT 456 LOW 178.80 172.60 179.60 177.00
BT 456 NONE 190.00 183.20 184.80 186.00
BT123 HIGH 155.10 163.00 163.90 160.67
BT123 LOW 164.00 162.60 168.30 164.97
BT123 NONE 160.10 164.80 164.20 163.03
GOLDEN CROP (NON BT) HIGH 135.40 139.60 138.30 137.77
GOLDEN CROP (NON BT) LOW 177.90 171.20 170.60 173.23
GOLDEN CROP (NON BT) NONE