What is a major concern surrounding GMOs that critics cite as an argument against GMOs?
A) They could escape containment and outcompete non-GMOs resulting in extinction of the GMO.
B) They could escape containment and produce even more useful genetic variants.
C) They could escape containment and pollute other gene pools.
D) They could escape containment and breed with non-GMOs and create unregulated hybrids.
Answer: D
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List three properties that all forms of cancers share and summarize the origin of these properties
What will be an ideal response?
Your research project involves sea cucumbers, a poorly-understood group of echinoderms. You are trying to determine whether they block polyspermy by changing membrane potential like sea urchins do. In the chart below, you have counted the number of embryos that complete normal development after fertilization in either normal or low-sodium artificial sea water (ASW), for each of three sets of experiments. Looking over your data, what do you conclude?
A. Sea cucumbers appear not to block polyspermy the same way as sea urchins, which use an influx of Na+ that changes the membrane potential.
B. Sea cucumbers appear not to block polyspermy the same way as sea urchins, which use an outflow of Na+ that changes the membrane potential.
C. Sea cucumbers appear to block polyspermy the same way as sea urchins, via an influx of Na+ that changes the membrane potential.
D. Sea cucumbers appear to block polyspermy the same way as sea urchins, via an outflow of Na+ that changes the membrane potential.
Clarify Question
What is the key concept addressed by the question?
What type of thinking is required?
Gather Content
What do you already know about fertilization in sea urchins? What other information is related to the question?
Choose Answer
Given what you now know, what information is most likely to produce the correct answer?
Reflect on Process
Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
During embryonic development, which germ layer is the innermost and lines the developing digestive tube?
a. Endoderm b. mesoderm c. Ectoderm d. Exoderm
A human cell with a Barr body always comes from a female.
Answer the following statement true (T) or false (F)