Test 4 Flashcards
During the phytoremediation experiment l, Emmanuel is having little success removing large quantities of contaminants from soil, despite flourishing vegetative growth from testing plants. A likely explanation for this lack of removal is that Emmanuel used plants with:
Weak, shallow roots system
The presence of fuzzy colored spots on the surface of fruits, bread, other foods is an indication of the growth of a:
Fungus
While planning a bioremediation experiment, Keith hopes to fine the conditions best suites for a species of bacteria to remove contaminants from soil. The variable he should attempt to alter in each soil sample are:
Moisture content, temperature, oh
A scientifically valid control group for a soil bioremediation experiment testing the effect of various plants in removing contaminants, should differ from the experimental groups only in the:
Presence of no plants in the sample
Cal is conducting a bioremediation experiment testing the effectiveness of various bacteria at removing fertilizer waste from water samples. Cal should Tessy impact the bacteria in each sample by:
Regularly test the water using immunoassay test
Aerobic bacteria are often used in Bioremediation experiments attempting to remove contaminants from water sources, however these bacteria are often require the use of an air pump to
Oxygenate the sample water
Balloons are often used in bioremediation experiments to
Capture gases produced by bacteria During fermentation processes
Agricultural production techniques utilizing transgenic crops with insect resistance have improved the biodiversity of insect populations and surrounding areas by
Preventing the death of nontarget insects
An example of sustainability is the use of genetically altered bacteria to produce medicines and medical substances as a bacteria
Quickly reproduce creating a plentiful supply unlike natural plant and animal sources
The use of cloned animals to increase the number of organisms in endangered population is seen as dangerous by many scientists who think practice will
Disrupt game fly through natural reproduction in the population
The production of an Asian Guar named Noah in 2000 was significant as it was the first successful
Clone to be born from a surrogate mother of another species
According to recent studies the use of BT crops and other transgenic plants in the United States has help farmers to decrease
Pesticide use by more than 46 million pounds
Agriscience researchers attempting to develop alternatives for fossil fuels, please biodiesel andethanol using
Organic agricultural products and byproducts
A biotechnology technique most used to clean superfund sites and other contaminated areas is
Bioremediation
When the first important commercial applications of modern bioremediation techniques was the use of bacteria to
Consume create all released in the ocean from tanker spills
BSM immunoassay test is an important method for the
Detection of a large number of contaminants at very low levels
The placement of a cheap, expendable fish highly suseptible to change in pH and fish tank full of expensive eels is an example of the use of
Indicator species
Scientists have recently inserted genes from bacteria and animals into cottonwood trees, allowing the trees to convert heavy metals to useful forms. This makes transgenic cottonwoods a good candidate for use in
Phytoremediation
The use of genetically altered transgenic organisms as Biological controls for insect and plant pests has increased as researchers have been able to use more
Predatory and parasitic organisms
Recent attempts to create new efficient biofuels have produced a diesel fuel that
Those more expensive than regular diesel, is sustainable and quickly biodegrades
The use of biosensors and agriscience allow agriculturalist to monitor minor changes and ecosystem by using a transducer to measure
The responding changes in the specific population of organisms
Salmonella is the most common bacteria often transmitted to humans from
Raw eggs
Jimmy is conducting spearmint gum safety of pickled foods by testing the bacteria levels in jars for six months. The variable most likely to that bacteria levels is the
PH level
Jen discovers that the lid of the canning jar is popped out prior to opening the jar. The canned materials are most likely
Contaminated by a potentially deadly toxins
Holly tested several cracked eggs for the presence of salmonella. If she places samples testing positive in the freezer for one week then she removes the sample she should expect to find
Nearly the same levels of salmonella before
Mohammed uses irradiation in his restaurant in order to
Quickly sterilize feet without having a noticeable effect on it’s taste
Ishmael removes the water in meat that he wishes to preserve by dehydration and salting. Both methods are effective because
Bacteria cannot live and function
Hector is testing on bacteria growth rates in cottage cheese. In order to preserve the samples without changing the bacterial populations, he stores the samples by
Freezing the cottage cheese slightly below 0°C
An example of recent attempts of scientists to remove the genes responsible for the production of negative substances in foods is the attempt to remove
Caffeine from coffee beans
Decreases in the time required for bread to rise or beer to Ferment can most likely be achieved through the creation of
Transgenic yeast
The risk that inserted genes may contain common allergies is a major concern regarding the
Consumption of genetically modified foods
Isolating genes responsible for the production of vitamins and other substances and inserting them into various production crops, agricultural researchers were able to produce food products
With increased nutritional value
The insertion of genetic resistance for various insect pests has increase the safety of food by decreasing the
Amount of pesticide residue on plants
The removal of genes responsible for the production of ethylene in Apple and other fruits has enabled agriculturalists to
Increase the time person in which fruits maybe stored
Besides controlling insect damage in the field the insertion of BT genes into crops has also reduced post harvest damage by reducing the damage areas that often provide a perfect habitat for
Fungal diseases
Golden rice and other recent crop developments represent the efforts of researchers please transgenic organisms to combat malnutrition by creating organisms that
produce high levels of vitamins
Until the recent insertion of a gene into bacteria coding for the production of the enzyme rennin, what product was made exclusively from enzymes are made from the stomachs of cattle
Cheese
Yogurt often has little impact on lactose intolerant individuals because
Much of the lactose in yogurt is converted to sugar about enzymes
During the process of alcoholic fermentation yeast produces
CO2 and ethanol
Water temperature must be carefully tested before placing yeast in the mixture, as extremely hot water can
Kill the yeast
If Jason studies is an zymology he is most likely to study the function and process of
Fermentation
During the fermentation process yeast consume what compound
Sugar
To destroy harmful bacteria, meat should be prepared at
74°C in an oven for 20 seconds
The presence of what organism in food is a common cause of food poisoning humans
campylobacter
The temperature at which most harmful microorganisms present in food are most active is
44°C to 80°C
Most ever from bacteria in that most molds affecting foods are transferred from
Exposure to air
