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MAXImum [283]
3 years ago
15

what would occur if the pistil of the flower would not be sticky at the top? what would that mean for the reproduction of the fl

ower?
Biology
1 answer:
poizon [28]3 years ago
6 0
No pollen will be able to stick to it
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What makes finches in the Galápagos Islands a good example of speciation?
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Well the finches there vary all over the islands there are many different ones who are similar but have a slight varitaion
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Sara and Juan conducted an experiment to test which soil would be BEST for growing plants.
pantera1 [17]

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A. Type of soil

Explanation:

A control experiment is the one that is used to checkmate the real experiment.

In this case, the fourth jar that contains the mixture of all the types of the soil is considered as the control experiment.

In a nutshell, it should be generally understood here that the type of soil serves as the control for the experiment.

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What is the process by which animals change over time
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evolution? I think?

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3 years ago
19. (03.06 HC)
murzikaleks [220]
1. B

2. <span>It needs to be understood if this really affects the cow or the consumer in any negative way. 

3. C but i'm not sure

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5. A but i'm not sure

6. <span>A high degree of illegal drug use among young adults

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In 1953, the scientists James Watson and Francis Crick published their landmark findings on the structure of DNA. Watson and Cri
Digiron [165]

Answer:

The correct selection of answers to the question: Identify the pieces of evidence describing the features of DNA that Watson and Crick used to determine the structure of DNA, would be:

C: The two chains are parallel, both running in a 5´ to 3´ direction

D: A purine base forms hydrogen bonds to pair with a pyrimidine base located on the opposite DNA strand. Specifically, A pairs with T, and C pairs with G.

E: The sugar-phosphate backbones of each DNA helix run antiparallel to one another

F: The diameter of the DNA doube helix is 2 nm, with each purine-pyrimidine base pair spanning an equivalent distance between the two chains.

Explanation:

Although Watson´s and Crick´s research, and model of the DNA helix, became the breakthrough for science, as it visually presented the now known characteristics of DNA, this research was possible due to the way that these two researchers used previous information found by other scientist on the molecule, to finally build their model. All of the options that were selected were part of the research of several scientis, including Mendel, Rosalin Franklin, Linus Pauling, Maurice Wilkins, Oswald Avery and many others, who worked on different aspects of specimens and their specific characteristics, and which led them to discover that organisms possessed DNA, that this was the unit of information that directed all functions in living cells and how this DNA helix was chemically built to understand how it worked, and why it worked the way it did.

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