Question

Please HELP!

Will Medal & Fan

Answer 1

In a population of deer, each deer consumes, on average, plants containing 650 J of energy. If 345 J of this is excreted in feces and 280 J is used for respiration, what is the production efficiency of the deer?
3.8%
4.0%
8.2%
10.4%

Answer 2

A population of 22 lizards undergoes linear growth and increases to 212 individuals over a six-year span. What is the growth rate of this population?
0.13 lizards per year
1.61 lizards per year
9.64 lizards per year
57.80 lizards per year

Answer 3

Examine the image of a biological polymer.
How do the components of DNA circled in the diagram above determine DNA's physical properties?

Glucose and phosphate are linked by hydrogen bonds to nitrogenous bases.
Nitrogenous bases and phosphates link together to form a biological polymer.
Nucleotides form covalent bonds with phosphate to form DNA monomers.
Repeating units of phosphate and deoxyribose form the backbone of DNA.

Answer 4

@Teddyiswatshecallsme @iGreen @iambatman @ganeshie8 @Figureskater12 @Rainbow_dashie @dan815 @wwhitlock @Preetha @Legends @King.Void. @sammixboo @dmndlife24 @AravindG

Answer 5

Which of the following is NOT a way in which amino acid structure and sequence might affect the properties of a protein?

Amino acid side chains form peptide bonds with each other, causing the molecule to twist into a secondary structure.
Amino acid side chains interact with each other, causing polypeptides to bend into a tertiary structure.
Hydrogen bonding between every fourth amino acid results in the formation of a coil called an α helix.
Hydrogen bonding between strands of parallel polypeptide chains causes β-pleated sheets to form.

Answer 6

Wow, biology looks hard.

Answer 7

Tell me about it.

Answer 8

@confluxepic @bohotness @mathmate @King.Void. @sammixboo

Answer 9

@AravindG @bohotness @confluxepic @dan815 @ElonaSushchik @Figureskater12 @Great_And_Powerful @Hotchellerae21 @iGreen @jojo4eva @King.Void. @Legends @mathmate @NeonStrawsForever @ObeyBatman @pooja195 @quillber07 @Rainbow_dashie @sammixboo @Teddyiswatshecallsme @undeadknight26 @vlltimelow @wwhitlock @xo_kansasprincess_xo @youngnephew34

Answer 10

Please help, Mathlete!

Answer 11

Hi!

Answer 12

@MafHater if you're there, I could help you with the math questions.
I don't know much about DNA.

Answer 13

Okay!

Answer 14

So, wanna do the first one?

Answer 15

How much energy is actually used by a deer?

Answer 16

650 J of energy

Answer 17

650 J ingested (total) is correct, but...
345 J excreted
280 J used in respiration (presumably to warm up and humidify the air
How much is left for the deer's other energy needs?

Answer 18

345+280=625
650-625=25

Answer 19

Very good.
Efficiency is defined as useful work out of total energy expensed.
Can you find that for me, in numbers?

Answer 20

I'm not sure what you're asking.

Answer 21

Wait, so, I found 25, should I just find what percentage 25 is of 650?

Answer 22

If I buy gasoline worth 100 joules, and I get only 30 J of useful work, the efficiency is 30/100=0.3 (always a number smaller than one).

Answer 23

25 is 3.8461538461538% of 650

Answer 24

Which is the first answer choice.

Answer 25

Hello?

Answer 26

Yes, that's the correct answer for the first problem! Good work!

Answer 27

I have a problem with the second question, unless there is a typo.
The question says the growth is linear, which means that the increase is the same for every year over 6 years. My answer does not match any one of the four given, so I hope there is a typo somewhere either in the answer choices or in the question.

Answer 28

Increase over 6 years = 212-22=190
Time span = 6
So answer should be 190/6=31.7 lizards per year, unless I am mistaken.