Which of the letters in the above figure represents
the ovaries where eggs are produced?
a. A
b. B
c. C
d. D
e. none of these
Answer: d
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A NASA probe returned samples of rocks from the surface of Mars. From these rocks, a prokaryotic organism was isolated and remained viable under conditions similar to that of Mars. The organisms are capable of dividing to replicate themselves. In order to determine whether the DNA replication of these organisms was semiconservative, an experiment using N15/N14 (similar to that of Mendelson and
Stahl) was performed. If the method of DNA replication were conservative, after one generation one would expect to see A) all of the DNA in the heavy (N15) band. B) all of the DNA in the light (N14) band. C) all of the DNA at a point midway between the heavy and light bands. D) half of the DNA in the light band, the other half in the heavy band. E) none of the above
A mycorrhizae is a symbiotic association between roots and fungi
Indicate whether this statement is TRUE or FALSE.
In your garden, you have an Ailanthus altissima, also known as the Tree-of-Heaven. You try adding additional plants to the same garden bed, but notice poor seed germination and seedling growth around the tree. What is the most likely explanation for this?
A. The tree is blocking most of the available sunlight which is limiting germination and growth. B. The tree is utilizing most of the available miconutrients in the soil. C. The roots of the tree have a stronger water potential than the seedlings which is causing the seedlings to dehydrate. D. The tree has a mutalistic relationship with animals that are removing plants that are in competition for resources with the tree. E. The tree is releasing chemicals into the soil that are inhibiting germination and growth of other plants. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about about plant interactions? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach 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?
Which enzyme adds new nucleotides to the end of a growing strand?
A. helicase B. polymerase C. gyrase D. ligase E. endonuclease