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insens350 [35]
2 years ago
14

For the past 20 years, the population of the invasive Asian Carp in the Mississippi River has skyrocketed while populations of n

ative species have declined. Which of the following conclusions provides the best explanation for this phenomenon?
The carp out-competed the native species for food and space.
The food sources preferred by the carp increased.
The native species migrated to new areas, while the carp remained.
The native species contracted a virus that the carp were immune to.
Biology
2 answers:
padilas [110]2 years ago
8 0
I say its A








i would say its A bc of population
quester [9]2 years ago
3 0
I would say A is most likely the correct answer
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What is the point at which a dna strand is unzipped so that it can form new complementary bases?
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The anwser is double helix

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Which of the following can be determined directly from X-ray diffraction photographs of crystallized DNA?
nordsb [41]

Answer:

A) the diameter of the helix

Explanation:

This is was measured during  the 3D  structure of DNA proposed by James Waston and Francis Crick in 1953. The x-ray  diffraction showed crossed shape of the X-ray films.The DNA appeared as two double strands structure.

The diameter of the DNA double helix is 20 Armstrong.

This  diameter is constant  because of the complementary pairing of bases.( purines with pyrimidines)

6 0
3 years ago
What is a qualitative observation? A. An observation in which the length, volume, or weight of something is measured. B. An obse
Harlamova29_29 [7]
Hey!


First, we must know the definition of a "qualitative observation." The definition of a qualitative observation is something that can be observed with our senses. Such senses include touch, taste, sight, smell, and hearing. It wouldn't directly involve measurements, weight, and exact sizes since we cannot know this from our senses alone.

Now, we can solve this problem with the process of elimination to find which option is the best fit for the definition. 

We'll start with option one.

<em>Option One :</em>
<span>An observation in which the length, volume, or weight of something is measured.

</span>According to the definition, this statement cannot be the answer because it  states it needs the length, volume, or weight of something is measured. A qua<span>litative observation does not need these things.

<em>This option is INCORRECT.</em>

Let's look at option two.

<em>Option Two :</em>
</span><span>An observation that depends on an objective measurement rather than a subjective assessment.

Again, this statement says that it depends on an objective measurement, which is something a qua</span><span>litative observation do not need.

<em>This option is INCORRECT.</em>

Moving on to option three.

<em>Option Three :</em>
</span><span>An observation in which something is counted.

According to the definition of a </span>qualitative observation, a <span>qualitative observation is going to require more than just counting an object. So, this cannot be the correct answer.

<em>This option is INCORRECT.</em>

With all of the options gone, this must mean that the last answer is the correct answer. But just to be 110% sure we'll take a look at the option.

<em>Option Four :</em>
</span><span>An observation in which the appearance of something is described using descriptive language.

According to the definition, this option is the correct option. It provides a close enough definition that matches a </span><span>qualitative observation. It states the checking the appearance of something in descriptive language.

<em>This is CORRECT.</em>

So,the answer to this question is...

<em>The option that provides a good definition for a </em></span><span><em>qualitative observation is</em>  option D.

Hope this helps!


- Lindsey Frazier ♥</span>
4 0
3 years ago
Read 2 more answers
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