Biology, 25.03.2021 20:20, queenkimm26
An organic farmer is having problems with a particular insect pest in his fields and has consulted the local agricultural extension office for possible solutions. He cannot use pesticides on his fields if he is to maintain his organic certification. You are consulted about the possible use of an entomopathogenic nematode as a means of controlling the insect pest. You need to consider ALL BUT which of the following?
a. Entomopathogenic nematodes are very host-specific, so you must determine if one is available for the particular insect pest the farmer wants to kill.
b. Only certain species of nematodes are entomopathogenic and carry symbiotic bacteria capable of killing insects.
c. You must be wary of the nematode killing beneficial insects like pollinating bees, because they are generalist pathogens.
d. The entomopathogenic nematodes must be acquired when they are in a part of their life cycle during which they can survive outside of the insect host and are infective
Answers: 2
Biology, 22.06.2019 19:30, Dreamer05
5. what might happen if you were to remove all light from the setup after the discs have all become buoyant? describe what you would see. explain why this would occur with relation to cellular processes like respiration. [referring to an ap biology lab in which spinach discs are placed in a sodium bicarbonate solution and exposed to light.]
Answers: 1
Biology, 22.06.2019 22:00, lilchannelll4125
Imagine you are a student in alfred hershey and martha chase's lab in the late 1940's. you are given five test tubes with the e. coli bacteria that were infected with t2 bacteriophage that have been labeled with 32p or 35s. unfortunately, you forgot to label the tubes and are now uncertain which were 32p labeled and which were 35s labeled. you place the contents of each tube in a blender and pulse it for a few seconds to shear off the protein coats from the bacterial outer membranes. you then centrifuge the contents to seperate the protein coats and the bacterial cells. you then check for radioactivity and obtain the results shown below. which tubes contained e. coli infected with the phage labeled with 32p? select all tubes that apply.
Answers: 3
Biology, 23.06.2019 04:31, Roof55
Soils, fertilizers, and pesticides erode and are transported by surrounding waterways to a different location. which of the following is where they will most likely end up? a) they will be found on a faraway beach. b) they will be carried by a river and then deposited in the delta area. c) they will be found in mountainous regions. d) they will become airborne and travel with the wind around the earth.
Answers: 2
An organic farmer is having problems with a particular insect pest in his fields and has consulted t...
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