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likoan [24]
3 years ago
15

white perch is a fish that is native to atlantic coastal regions and is invasive to the great lake it feeds on native species an

d is though to be the cause of the decline of the great lake walleye fish population what was most likely its mode of introduction
Biology
2 answers:
WITCHER [35]3 years ago
7 0

endangered species is the answer

ikadub [295]3 years ago
7 0

Hello. This question is incomplete. The full question is:

"White perch is a fish that is native to Atlantic coastal regions and is invasive to the Great Lakes. It feeds on native species and is thought to be the cause of the decline of the Great Lakes walleye fish populations. What was most likely its mode of introduction?  A. Produce brought from the eastern states  B. Trapped in a ship's ballast or a water tank  C. Trapped in a cargo crate carrying nonperishable items  D. Luggage brought in an overseas flight"

Answer:

B. Trapped in a ship's ballast or a water tank

Explanation:

The way that fish like the White Perch can move from its habitat to an area where it becomes an invasive species is usually through the vessel's reactor or in a water tank. since the traffic of these ships is common in the region.

Although this fish is not introduced into other areas "directly" by the action of man, it is important that the ship's crew be attentive to the possible transport of these fish, since its presence in other regions causes problems for local fish.

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Can plzzz <br>put the explanations was to why one is correct and why the others are wrong​
ch4aika [34]

Hi there!

<h3>Question 15:</h3>

We can see from the graph the spikes during the dry years in beak size, which happen every single time there is a dry year. We can then reasonably infer that this would happen with an extended period of drought, however more significantly as well.

This makes your answer B, the birds with larger beaks would be more numerous.

Looking through the other answer choices - A is incorrect, as just stated above the larger ones would likely become more numerous. C is also incorrect, as we can see from the graph during dry years it does influence ground finches. Finally, D is also incorrect, as we can see the average obviously moving upwards to those with bigger beaks.

<h3>Question 16:</h3>

We are given that during dry years, the finches eat larger seeds as the smaller seeds are less abundant. This means that those finches with larger beaks would have an advantage for survival, as it is easier for them to eat these larger seeds compared to those with smaller beaks. This then means that more and more finches with larger beaks would survive, making the overall population have larger beaks over time.

This makes your answer C, different adaptations gave some birds a better chance for survival.

Looking through the other answer choices - A is incorrect, as they cannot just decide to acquire larger beaks. B is incorrect, as mutations do not just happen and cause such a big shift, and in an efficient direction (most mutations end up not affecting the animal at all. Finally, D is incorrect, as I don't think beaks have the capability of getting larger as they are exercised more.

Hope this helps! Feel free to let me know if you have any additional questions about this specific problem.

4 0
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