C. QUIZ TRUE or FALSE: Write True if the statement is correct and False if it is not.
1. The recombinant plasmid would then be placed back to the bacterium in a process
2. One of the benefits of genetic engineering is that genetically modified animals have
3. Risks of GMOs will increased endocrine disruption, reproductive disorders, and
higher resistance to disease and overall better health.
called transformation
accelerated aging.
INS
4. Genetic Engineering modifying genes in a living organism to produce genetically
modified organisms (GMOs) also known as transgenic organisms.
5. GM crops may not cause short and long term effects on the environment,
6. Restriction enzymes are also called restriction endonucleases.
7. Genetic engineering doesn't have various applications in the field of medicine,
environment, and agriculture.
8. Risks of using GMOs involved soil and water pollution.
9. GMOs can reduced greenhouse gas emissions
10. Genetic engineering is an application of biotechnology which uses biological
systems, processes, or organisms to create products intended to improve the quality
of human life.

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

1. the question asks the most appropriate, which seems to rule out "all of the above." your choice appears to be the correct one.

2. the protocol described is good for identifying correlation, but not cause and effect. for cause/effect, you need to devise a protocol that will assign the treatment (or not) to groups that have essentially the same "demographics" with respect to all the other variables. your choice regarding control group seems appropriate. random assignment of treatment (choice d) may be appropriate also. (i think you can argue that b and d are just different descriptions of the same method.)

3. d will randomize the birds, but may not guarantee there are 10 in each group. e will do both, so seems the better choice.

comment on question 2

based on the problem statement, it seems clear that confident, attentive drivers are more likely to use daytime running lights. so, the protocol might need to be devised in such a way that the lights would be turned on or off without the driver's knowledge. (an attentive driver will figure it out.) assigning a confident, attentive driver to a group required to drive without running lights might mess with his/her confidence and attentiveness. you don't want your experiment to do that. (nor do you want the experiment to subject a driver to greater risk of accident as a consequence of driving without running lights.) experiments involving human safety are always problematic.

6.4 cm (max) - 25 cm (min)

the answer is minerals.