25 Jun GMC BIO123 Week 1 Dependent and Independent Variables Virtual Lab Report
Question
VIRTUAL LAB: DEPENDENT AND INDEPENDENT VARIABLES
WORKSHEET
ECB REFERS TO:
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?
ABOUT 23
ABOUT 65
ABOUT 140
ABOUT 180
“BT CORN” REFERS TO CORN THAT:
HAS BEEN INFESTED WITH INSECT PESTS
HAS BEEN INFECTED WITH BACTERIA
IS RESISTANT TO ECB
IS NOT AFFECTED BY PESTICIDES
BT IS:
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:
EUROPEAN CORN BORER
BACILLUS THURINGIENSIS
A CORN PLANT
ALL OF THE ABOVE CONTRIBUTE GENETIC MATERIAL TO THE PRODUCTION OF BT CORN
TABLE 1: AVERAGE YIELD FOR EACH SEED VARIETY AT NO, LOW, AND HIGH INFESTATION LEVELS
SEED VARIETY
LEVEL OF ECB INFESTATION
POT 1
YIELD
POT 2
YIELD
POT 3
YIELD
AVERAGE
YIELD
BT 123
NONE
164
162.6
168.3
165
LOW
161.1
164.8
164.2
163.4
HIGH
155.1
163
163.9
160.7
BT 456
NONE
190
183.2
184.8
186
LOW
178.8
172.6
179.6
177
HIGH
157.3
157
159
157.8
GOLDEN
NONE
181.6
182.8
189.8
184.7
LOW
177.9
171.2
170.6
173.2
HIGH
135.4
139.6
138.3
137.8
SUPER HARVEST
NONE
164.1
164.3
161.9
163.4
LOW
159.1
155
157.5
157.2
HIGH
125.5
129
130
128.2
TABLE 2: % REDUCTION IN YIELD FOR EACH SEED VARIETY AT HIGH LEVELS OF INFESTATION
(TRANSFER DATA ON AVERAGE YIELD WITH NO INFESTATION AND HIGH INFESTATION FROM TABLE 1 TO TABLE 2)
SEED VARIETY
AVG. YIELD WITH
NO INFESTATION
AVG. YIELD WITH HIGH INFESTATION
% REDUCTION
IN YIELD
BT 123
165
160.7
2.6%
BT 456
186
157.8
15.3%
GOLDEN
181.6
137.8
24.5%
SUPER HARVEST
164.1
128.2
22%
FOR EACH SEED VARIETY, WHY DID YOU NEED TO COLLECT DATA FROM 3 POTS FOR EACH INFESTATION LEVEL TO OBTAIN RELIABLE DATA?
WHICH SEED VARIETY HAS THE HIGHEST YIELD UNDER CONDITIONS OF NO INFESTATION?
WHICH TRANSGENIC SEED VARIETY WAS MOST RESISTANT TO THE ECB AT HIGH INFESTATION LEVELS?
WHICH NON-TRANSGENIC SEED VARIETY WAS MOST RESISTANT TO THE ECB AT HIGH INFESTATION LEVELS?
COMPARE THE YIELD OF SUPER HARVEST SEEDS AND BT 123 SEEDS UNDER CONDITIONS OF NO INFESTATION. IS THERE ANY DIFFERENCE IN THE AVG. YIELD?
IF YOU COMPARED ONE POT OF SUPER HARVEST AND ONE POT OF BT 123 WITH NO INFESTATION, WOULD YOU EXPECT THE YIELD OF EACH POT TO BE WITHIN 0.5G? EXPLAIN YOUR ANSWER.
A FARMER DECIDES TO PLANT 90% OF ONE FIELD WITH BT 123 SEEDS AND THE REMAINING 10% OF THE FIELD WITH A DIFFERENT SEED VARIETY. HE HOPES THIS WILL SLOW THE EVOLUTIONARY DEVELOPMENT OF BT RESISTANT INSECTS. WHICH SEED VARIETY SHOULD HE USE THE 10% OF HIS FIELD THAT IS NOT PLANTED WITH BT 123 SEEDS? EXPLAIN YOUR ANSWER.
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