Quick Answer: What Is Located Between Bear Paw Lake And Frog Lake Jist Tovthr North?

What is an important difference between Bear Paw Lake and Frog lake?

difference is that Bear Paw Lake is completely enclosed and does not drain at the surface. This means that predatory fish cannot readily enter the lake. On the other hand, Frog Lake is connected to the water system by a small stream, which allows predatory fish to gain access to the lake.

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Does the pelvic phenotype differ between Bear Paw Lake and Frog lake fish?

Fish in marine and sea-run populations have complete pelvises; the pelvic spines protect stickleback fish from larger fish that prey on them in the ocean. Most stickleback fish in Bear Paw Lake have either a reduced or an absent pelvis, whereas those in Frog Lake have a complete pelvis.

What does it mean to reject the null hypothesis for Bear Paw and Coyote lakes?

We can reject the null hypothesis for Bear Paw Lake but not Coyote Lake. Correct! Your answer: C Why? The probability is less than 0.05 for both lakes. This means that the null hypothesis (i.e., your expectation of50:50) can be rejected for Bear Paw Lake and Coyote Lake.

Why is it important to compare pelvic structures of stickleback populations from two different lakes?

6. In this virtual lab, why did you compare pelvic structures of stickleback populations from two different lakes? To have a larger number of specimens to score, increasing the accuracy of results. To compare the trait in stickleback populations living in two potentially different environments.

Why are the stickleback fish in Frog Lake more similar to ocean and sea run stickleback than they are to those in Bear Paw Lake?

Most stickleback fish in Bear Paw Lake have either a reduced or an absent pelvis, whereas those in Frog Lake have a complete pelvis. Thus, the stickleback population in Frog Lake is more similar to marine and sea-run stickleback populations.

What characteristics of stickleback fish make them ideal for studying natural selection in the wild?

Transcribed image text: What characteristics of stickleback fish make them ideal for studying natural selection in the wild? Stickleback populations are in environments with or without predators. Heritable variation in armor directly affects the fitness of sticklebacks.

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How do pelvic spines affect the fitness of stickleback fish in lakes?

Ocean stickleback have bony side plates and pelvic spines as protection from predators. In Bear Paw lake, pelvic spines reduce fitness and chances for reproduction because predators grab the spines; most fish have no pelvic spines.

Do you reject or fail to reject the null hypothesis for the data from each lake?

The p value for the data for Bear Paw Lake and Frog Lake is less than 0.05, which means that the null hypothesis (i.e., your expectation of 50:50) can be rejected. The p value for the data for Morvoro Lake is greater than 0.05; thus, the null hypothesis cannot be rejected.

Why do some stickleback populations lack pelvic spines in sea water pelvic spines help fish swim faster but not in fresh water the pelvic spines are homologous to legs in four-legged animals because fish don’t need Hind?

Why do some stickleback populations lack pelvic spines? In seawater, pelvic spines help fish swim faster, but not in freshwater. The pelvic spines are homologous to legs in four-legged animals. Because fish don’t need hind limbs to walk, many populations of fish evolved to lack pelvic spines.

What does it mean to reject the null hypothesis?

If there is less than a 5% chance of a result as extreme as the sample result if the null hypothesis were true, then the null hypothesis is rejected. When this happens, the result is said to be statistically significant.

Why are sticklebacks good for studying evolution?

Scientists have pinpointed mutations that may help a tiny armoured fish to evolve quickly between saltwater and freshwater forms. In as few as ten generations — an evolutionary blink of an eye — marine sticklebacks can swap their armoured plates and defensive spines for a lighter, smoother freshwater form.

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What happened to these fish as they adapted to living exclusively in fresh water?

What happened to these fish as they adapted to living exclusively in fresh water? As they adapted to life in fresh water, all stickleback populations living in lakes in Alaska underwent exactly the same evolutionary changes.

What 3 things have changed in the stickleback fish over time?

In freshwater, they faced weaker but faster predators, so they lost their spines and armour and became smaller and more agile. Their lifestyles, colour, mating habits, salt tolerance and diets also changed.

What is the purpose of the spines of sticklebacks?

The many stickleback populations underwent disparate and parallel evolutionary changes, among them partial or complete loss of their pelvic spines. These spines are thought to protect the fish from being devoured by predators.

Why are sticklebacks a model organism?

The threespine stickleback is an appropriate model organism for studying the effects of host genetic background on microbial community because wild populations exhibit genetic variation that is comparable to that of human populations.

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