Lab 1: Dependent and Independent Variables

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Name:
Lab 1: Dependent and Independent Variables (39 points)
Lab Results
Table 1: Average Yield for each seed variety at no, low, and high infestation levels (8 points)
Seed Variety Level of ECB Infestation Pot 1
Yield Pot 2
Yield Pot 3
Yield Average
Yield BT 123
None
Low
High BT 456
None
Low
High Golden
None
Low
High Super Harvest
None
Low
High
Table 2: % Reduction in yield for each seed variety at high levels of infestation (4 points)
(transfer data on average yield with no infestation and high infestation from Table 1 to Table 2)
% reduction = (ave. with no – aver. with high)/ave. with no * 100
Seed Variety Avg. Yield with
No Infestation Avg. Yield with High Infestation % Reduction
In Yield BT 123
BT 456
Golden
Super Harvest
Laboratory Analysis Questions
ECB refers to: (1 pt)
A genetically engineered plant that is resistant to insect pests
Edible corn byproducts
An insect pest that reduces corn yield
European corn borer
c and d
How many days are required for a corn seed to become a mature plant with maximum weight kernels ready to be harvested? (1 pt)
about 23
about 65
about 140
about 180
“BT Corn” refers to corn that: (1 pt)
Has been infested with insect pests
Has been infected with bacteria
Is resistant to ECB
Is not affected by pesticides
BT is: (1 pt)
A stomach poison produced by bacteria
A genetically engineered corn product
A bacterium carried by the European corn borer
A bacterium that has a gene for producing Cry proteins
Creation of BT corn requires genetic material from all of the following except: (1 pt)
European corn borer
Bacillus thuringiensis
a corn plant
all of the above contribute genetic material to the production of BT corn
For each seed variety, why did you need to collect data from 3 pots for each infestation level to obtain reliable data?