Ecology B/C

Test your knowledge of various Science Olympiad events.
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Ecology B/C

Postby Entomology » September 5th, 2017, 4:08 pm

Welcome to the 2018 Ecology Question Marathon!

Let's start simple:
1) List 2 adaptations of plants in the grassland and 2 of those in the desert.
2) Define ecosystem service, and provide an example.
3) Describe the role of fire in the Savanna.
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Re: Ecology B/C

Postby Magikarpmaster629 » September 19th, 2017, 8:36 am

Unome wrote:
AlyssaJJ wrote:Will there be a question? And is it okay to use recourses like https://samedaypapers.com/custom-essays or only my knowlenge?

The hide bar (in white with bolded text in the original post) can be clicked to reveal the question. You should also put your answer in a hide bar, like so:

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You've been bamboozled Unome...the bots are getting so good the can fool the mods...
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Re: Ecology B/C

Postby Unome » September 19th, 2017, 9:11 am

Magikarpmaster629 wrote:
Unome wrote:
AlyssaJJ wrote:Will there be a question? And is it okay to use recourses like https://samedaypapers.com/custom-essays or only my knowlenge?

The hide bar (in white with bolded text in the original post) can be clicked to reveal the question. You should also put your answer in a hide bar, like so:

Code: Select all

[hide]Visible text|Hidden text[/hide]

You've been bamboozled Unome...the bots are getting so good the can fool the mods...

Haha I probably should have read the rest of the post...
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Re: Ecology B/C

Postby The48thYoshi » December 10th, 2017, 8:49 am

Entomology wrote:Welcome to the 2018 Ecology Question Marathon!

Let's start simple:
1) List 2 adaptations of plants in the grassland and 2 of those in the desert.
2) Define ecosystem service, and provide an example.
3) Describe the role of fire in the Savanna.


Planned on making one of these cause I never saw it.
Answer:
1. Grassland: deep root systems and flexible stalks. Desert: waxy coatings and photosynthetic stem.
2. The free benefits humans get from an ecosystem. An example is a clean source of water.
3. Fire helps to maintain the open vegetation structure
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Re: Ecology B/C

Postby JakeTheCake » December 21st, 2017, 12:09 pm

I'm pretty sure that's correct,but how about having more water absorbing body's for the desert as an adaptation. :geek:

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Re: Ecology B/C

Postby The48thYoshi » January 11th, 2018, 11:50 am

I guess I’ll give a question then.

Given a species is in Hardy-Weinberg equilibrium and has two alleles, H and W, where the frequency of H is 32%, what proportion of the population is heterozygous HW?
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Re: Ecology B/C

Postby knottingpurple » January 14th, 2018, 9:23 am

The48thYoshi wrote:I guess I’ll give a question then.

Given a species is in Hardy-Weinberg equilibrium and has two alleles, H and W, where the frequency of H is 32%, what proportion of the population is heterozygous HW?


Answer
2*0.32*0.68 = 0.4352, so rounding to 2 significant figures, 44% of the population is heterozygous HW.
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Re: Ecology B/C

Postby The48thYoshi » January 17th, 2018, 2:08 pm

knottingpurple wrote:
The48thYoshi wrote:I guess I’ll give a question then.

Given a species is in Hardy-Weinberg equilibrium and has two alleles, H and W, where the frequency of H is 32%, what proportion of the population is heterozygous HW?


Answer
2*0.32*0.68 = 0.4352, so rounding to 2 significant figures, 44% of the population is heterozygous HW.


Correct! Your turn.
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Re: Ecology B/C

Postby knottingpurple » January 17th, 2018, 2:35 pm

A population has 250 individuals at the start of a 3-year monitoring period. By the end of the monitoring period, 12 individuals emigrate from the population, 23 individuals join the population, 17 individuals die and 26 individuals are born. What is the average annual growth rate?
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Re: Ecology B/C

Postby kate! » January 21st, 2018, 8:11 am

knottingpurple wrote:A population has 250 individuals at the start of a 3-year monitoring period. By the end of the monitoring period, 12 individuals emigrate from the population, 23 individuals join the population, 17 individuals die and 26 individuals are born. What is the average annual growth rate?


The average annual growth rate is 0.08 (percent??? what's the units??)
Last year I knew stuff about rocks, minerals, experiments, and ecosystems, yay!
Now I know stuff about amphibians, reptiles, water, and more experiments, yay again!
I'm planning to learn stuff about oceanography, fossils, water, and birds, yay for the third time!

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Re: Ecology B/C

Postby knottingpurple » January 21st, 2018, 8:42 am

kate! wrote:
knottingpurple wrote:A population has 250 individuals at the start of a 3-year monitoring period. By the end of the monitoring period, 12 individuals emigrate from the population, 23 individuals join the population, 17 individuals die and 26 individuals are born. What is the average annual growth rate?


The average annual growth rate is 0.08 (percent??? what's the units??)


Close, but this occurred over a 3-year monitoring period, not a 1-year monitoring period. I didn't explicitly ask for a percentage, so you don't have to put one, but if you did want it in that format you would multiply by 100%, so, for instance, an 0.01 growth rate would be 1%.

(Also, I think people normally hide their answers, but honestly this is the first time I've participated in a question marathon too, so maybe somebody else would be more useful for explaining how to do that?)
"She was determined to drop his acquaintance immediately, and she was very thankful that she had never been acquainted with him at all... she hated him so much that she was resolved never to mention his name again, and she should tell everybody she saw, how good-for-nothing he was."

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Re: Ecology B/C

Postby kate! » January 21st, 2018, 1:41 pm

knottingpurple wrote:
kate! wrote:
knottingpurple wrote:A population has 250 individuals at the start of a 3-year monitoring period. By the end of the monitoring period, 12 individuals emigrate from the population, 23 individuals join the population, 17 individuals die and 26 individuals are born. What is the average annual growth rate?


The average annual growth rate is 0.08 (percent??? what's the units??)


Close, but this occurred over a 3-year monitoring period, not a 1-year monitoring period. I didn't explicitly ask for a percentage, so you don't have to put one, but if you did want it in that format you would multiply by 100%, so, for instance, an 0.01 growth rate would be 1%.

(Also, I think people normally hide their answers, but honestly this is the first time I've participated in a question marathon too, so maybe somebody else would be more useful for explaining how to do that?)


You put in in the
hidden text
click the hide button, then write the subject and the text you want hidden and separate them with the straight line used in coding
also, can you explain how to figure it out over three years? do you divide everything by 3?
Last year I knew stuff about rocks, minerals, experiments, and ecosystems, yay!
Now I know stuff about amphibians, reptiles, water, and more experiments, yay again!
I'm planning to learn stuff about oceanography, fossils, water, and birds, yay for the third time!

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Re: Ecology B/C

Postby The48thYoshi » January 21st, 2018, 5:10 pm

kate! wrote:
knottingpurple wrote:
kate! wrote:
The average annual growth rate is 0.08 (percent??? what's the units??)


Close, but this occurred over a 3-year monitoring period, not a 1-year monitoring period. I didn't explicitly ask for a percentage, so you don't have to put one, but if you did want it in that format you would multiply by 100%, so, for instance, an 0.01 growth rate would be 1%.

(Also, I think people normally hide their answers, but honestly this is the first time I've participated in a question marathon too, so maybe somebody else would be more useful for explaining how to do that?)


You put in in the
hidden text
click the hide button, then write the subject and the text you want hidden and separate them with the straight line used in coding
also, can you explain how to figure it out over three years? do you divide everything by 3?


Mathematically it should be the third root, as you are multiplying the annual growth rate to itself for each year to get to the growth rate of he third year. Idk tho :?
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Re: Ecology B/C

Postby knottingpurple » January 21st, 2018, 7:09 pm

The48thYoshi wrote:
kate! wrote:
knottingpurple wrote:
Close, but this occurred over a 3-year monitoring period, not a 1-year monitoring period. I didn't explicitly ask for a percentage, so you don't have to put one, but if you did want it in that format you would multiply by 100%, so, for instance, an 0.01 growth rate would be 1%.

(Also, I think people normally hide their answers, but honestly this is the first time I've participated in a question marathon too, so maybe somebody else would be more useful for explaining how to do that?)


You put in in the
hidden text
click the hide button, then write the subject and the text you want hidden and separate them with the straight line used in coding
also, can you explain how to figure it out over three years? do you divide everything by 3?


Mathematically it should be the third root, as you are multiplying the annual growth rate to itself for each year to get to the growth rate of he third year. Idk tho :?


Although theoretically that's true, I think normally when people talk about average annual growth rate it's supposed to not take into account the effects of compounding?
"She was determined to drop his acquaintance immediately, and she was very thankful that she had never been acquainted with him at all... she hated him so much that she was resolved never to mention his name again, and she should tell everybody she saw, how good-for-nothing he was."

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Re: Ecology B/C

Postby kate! » February 7th, 2018, 3:03 pm

No one's been active on here for a month, so I'll ask some questions:

1. What is the difference between bioremediation and bioaugmentation?
2. What are 2 adaptations of plants to survive in the desert biome?
3. What happens to the birth and death rates of a population after it reaches carrying capacity?
Last year I knew stuff about rocks, minerals, experiments, and ecosystems, yay!
Now I know stuff about amphibians, reptiles, water, and more experiments, yay again!
I'm planning to learn stuff about oceanography, fossils, water, and birds, yay for the third time!


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