Question

Please help me with a biology question? Sorry to post here, but really need help. I'll fan and give a medal.

Answer 1

i would guess B

Answer 2

is that the food chain pyramid or something

Answer 3

The lower levels of the pyramid are prey to the higher levels and the higher you go up the pyramid, you can see that the layer gets smaller and smaller, the pyramid represents the energy being transferred from predator to prey.

Answer 4

The answer is not B

Answer 5

Did your bio teacher ever tell you that, only 10% of a prey's energy is transferred to the predator? The other 90% is released as heat and such, I if remember correctly.

Answer 6

i think it would be c, because you're going down the food chain and losing energy

Answer 7

do you mean From prey to Predator.

Answer 8

Yes, sorry.

Answer 9

how do you know which way you are going, i would assume UP

Answer 10

Yes, you do go up. Fish don't eat birds.

Answer 11

so the overall energy increases,

Answer 12

No, there is a loss of energy.

Answer 13

but the predator eats the prey, the prey doesn't eat the predator. so it would o down the food chain

Answer 14

oh oh, beg my pard beg my pard..

Answer 15

When you eat something, you don't gain all of its energy, only a small amount, that is whyyou have to eat more.

Answer 16

right so there is a gain in energy as you go up the pyramid then

Answer 17

Explain how you would gain energy as you go up the pyramid

Answer 18

why do you think is going up though?

Answer 19

my thought is, well mass is equivalent to energy by the famous E = mc^2, and if you eat something, you gain mass, therefore you contain more energy

Answer 20

The energy goes up because it is transferred from the thing that is eaten to the thing eating

Answer 21

i am just guessing, i havent taken biology since 9th grade

Answer 22

And I am a junior who just finished AP Bio

Answer 23

Sorry I'm bad at explaining though

Answer 24

ok if you eat something, how do you transfer your energy to that food? the food is part of you now.

Answer 25

aw man, i feel so stupid

Answer 26

The food is part of you now and so is a part of its energy

Answer 27

so you have more energy, and energy increases as you move up the pyramid by that logiv

Answer 28

Not all of its energy is obtained

Answer 29

logic

Answer 30

Haha omg I'm so bad at explaining xD

Answer 31

It like this, if you have a pie of pizza and you eat one then theres only 7 slices left but then the bully takes it away and eats another so now theres only 6 left and another bully takes another slice and theres 5 left until there is no more pizza slice left

Answer 32

but wouldn't you do down the pyramid? like the bird eats the big fish, the big fish eats the little fish, the little fish eats the snail, the snail eats the seaweed.

Answer 33

I see what they mean now, i looked it up..

Answer 34

Flow of energy through a food chain. As energy passes to a higher tropic level, approximately 90% of the useful energy is lost. High tropic levels contain less energy and fewer organisms than lower levels.

At each tropic level in a food chain, energy is used by the organisms at that level to maintain their own life process. Because of the 2nd law of energy, some energy is lost to the surroundings as heat. it is estimated that in going from one tropic level to the next, about 90 % of the energy is lost.
In moving to the next tropic level, only 10 % of the original energy is available. By the third tropic level only 1% of the energy is available.

Answer 35

So the energy of the original amount decreases as you go up, which makes sense, because most is lost as heat.

Answer 36

I thought they meant total mass energy

Answer 37

You start from the bottom up since the producers of energy are plants and they have the full amount of energy and they get eaten by herbivores or omnivores which get eaten by carnivores or other omnivores

Answer 38

right, i c what they are talking about now

Answer 39

Well cause you lose energy too, even when ur just sleeping, you lose energy bc ur body is trying to survive so thats why you have to keep eating if that makes sense

Answer 40

so if moving up 2 slots, and only 10% of that energy is available as 90% is lost to heat, then 2 levels up would only be 1% of the energy as 2 below

Answer 41

Ok cool cx wonder if the person who asked this question gets it now xD

Answer 42

Yep :D

Answer 43

I thought it meant TOTAL energy from mass, not the Energy to do work, not counting the energy to run your own body

Answer 44

Haha yeah well glad that got cleared up, right? cx

Answer 45

I just got schooled

Answer 46

Haha xD

Answer 47

I feel stupid but I got so lost with what you guys were saying lol sorry /: I had thought the answer was either B or D?

Answer 48

Total Energy = Work + Heat

Answer 49

It wouldn't be B or D, you can usually rule answers that are similar to each other.

Answer 50

That's true. My bad.

Answer 51

rule out*

Answer 52

It's alright, were here to learn and help each other out :)

Answer 53

lol here is the same diagram, look at this
http://www.learner.org/courses/essential/life/session7/closer5.html

Answer 54

cool so you get it? cx

Answer 55

i understand what they are talking about, although my understanding of energy of a system is a little different in physics.

Answer 56

Would it be A? Because if I'm understanding correctly, there would have to be no energy exchange before it took away.

Answer 57

An energy pyramid’s shape shows how the amount of useful energy that enters each level — chemical energy in the form of food — decreases as it is used by the organisms in that level.

Answer 58

The total energy of the system, the whole world, does not change. But considering just this food pyramid energy outline thing, the energy decreases 90% each level you go up

Answer 59

ok "useful energy" that is a key word that can be interpreted differently. lol

Answer 60

Hmm ya huh xP should of used that word earlier xP

Answer 61

cool, well it doesnt matter if i get it, you understand kmullis?

Answer 62

I havent had physics yet so maybe that's why it doesnt confuse me cx

Answer 63

Well, my 20 minutes in here turned into 2 hours... looks like DanJS can help you out if you need anything else, I gtg. Nice talking to you guys x)

Answer 64

Pretty sure. So it's C?

Answer 65

Yep :D

Answer 66

Alright! Thanks so much everyone! (:

Answer 67

k

Answer 68

thank you , i didnt understand prior to this either :)

Answer 69

So eventually, all the energy that originated at the bottom of the food chain will ALL be converted to HEAT. Which is why there is a limit to how many levels of the pyramid can exist.