Why is it beneficial that many predatory fish have larval and juvenile stages that feed at a low trophic level, while the adults feed at a tertiary or quaternary trophic level?
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Marine science
Why is it beneficial that many predatory fish have larval and juvenile stages that feed at a low trophic level, while the adults feed at a tertiary or quaternary trophic level? My answer was that the larval and juvenile stages would get more energy but my teacher said that ... 
marine science
Why is it beneficial that many predatory fish have larval and juvenile stages that feed at a low trophic level, while the adults feed at a tertiary or quaternarty trophic level? My answer was that the larval and juvenile stages get more energy since they are at a lower level ... 
science
• Explain the flow of energy through the ecosystem using specific plant and animal examples. Correctly use the following terms in your example and explanation; primary producer, primary consumer, secondary consumer, tertiary consumer, trophic level. • Explain which trophic... 
science
this is regarding food chains.will the impact of removing all the organisms in a trophic level be different for different trophic levels?can the organisms of any trophic level be removed without causing any damage to the ecosystem? 
bio
what is a trophic level how does the amount of energy change as you go from one trophic level to another 
Biology
What is true of the energy that is passed from one trophic level to the next in a food chain? A)About 10% of the energy passed from one level to the next is released as heat. B)About 10% of the stored energy of one level becomes stored energy at the next higher level. C)The ... 
biology
1.What is the % concentration of oil in the first, second, and third trophic levels in our food chain? 2.How did the concentration of oil change from one trophic level to the next? 3.How does the change in concentration represent biomagnification? 4.How does this also ... 
biology
will the impact of removing all the organisms in a trophic level be different for different levels?can the organisms of any trophic level be removed without causing any damage to the ecosystem? 
Biology
[Continued from my last post] B) Explain where a detritivore and a decomposer could enter this path. Explain what they feed on on the systems. My answer: Detritivores include worms and fungal and bacterial decomposers. Bacteria and fungi are known as decomposers because they ... 
math word problem
Nikki is fishing from a bank 27 feet above water level. In this location, the fish tend to feed at 37 feet below the surface. How long must Nikki's fish line be to reach the fish? 
biology
energy that is lost at each trophic level of an ecosystem is replenished by???? 
sciance
please explain why biomass and energy decreases fron one trophic level to the next 
Science
What percentage of the energy from the grass would the hawks get in the trophic level pyramid of a food chain 
businessprogramming
A cattle feed company has two grades of feed , A and B . Feed A cost $2 per 100 pounds and feed B cost $3 per 100 pounds . Ranchers can order a mixture of feeds A and B . Write a program that calculates the charge for a feed order . The program should ask the user to enter the... 
Environmental Science
What organism is likely to be in the bottom trophic level of a food chain? Single Celled of some kind depending on the environment. 
Biology
Which organism is a thirdorder heterotroph? To what trophic level does that organism belong? 
science!
Hi. I live in Wisconsin and I have to describe how productivity (amount of biomass produced), diversity (variety of species), complexity (number of species in trophic levels and number of trophic levels), and resilience (remaining stable) affects my ecosystem. I really have no... 
science
Hi. I live in Wisconsin and I have to describe how productivity (amount of biomass produced), diversity (variety of species), complexity (number of species in trophic levels and number of trophic levels), and resilience (remaining stable) affects my ecosystem. I really have no... 
Environmental Science
In a short answer, Explain why an energy pyramid is used to represent the amount of energy at each trophic level. 
science
describe the efficiency of energy tranfer and how the amount of energy available at each trophic level affects the structure of the ecosystem> 
Biology!
1. Urea is made where? Is it in the kidneys or the liver? 2. Which trophic level gets the least amount of energy? a) producers b) herbivores c) carnivores d) decomposers I think the answer is c, but i'm not sure if it's right. 
Biology
Hi, I am studying energy movements in ecosystems. Could you help me with this question: What type of food would be consumed by a secondaryconsumer in the third trophic level of a food chain. 
Science
Say you had a pond that initial had 30 fish. There was 3 fisherman collecting at least 2 fish to feed their family, They fish for 3 seasons ? At the end of the day you would double the fish whatever you had left. $5 a fish What happened to amount of food and money each person ... 
science fair clown fish
I need a topic for my science fair experimentI'm in the 6th grade and I would like to do something w/ clown fish, but I'm not sure what my hypothesis should be, please help. We own a pet shop so have have a lot of access to salt water stuff. P.S. It can't do harm to the fish ... 
chemistry
Using a periodic table, determine the number of electrons held in energy levels 13 of each atom. B2 in level 13 in level 20 in level 3 C2 in level 14 in level 20 in level 3 Mg2 in level 18 in level 22 in level 3 
math
It costs about .10cents per week to feed a snake. How much does it cost to feed 35 snakes for 4 weeks? 
statistics
Jesse took two data points from the weight and feed cost data set and calculated a slope, or average rate of change. A rat weighs 3.5 pounds and costs $4.50 per week to feed, while a Beagle weighs 30 pounds and costs $9.20 per week to feed. Using weight as the explanatory ... 
statistics
Jesse took two data points from the weight and feed cost data set and calculated a slope, or average rate of change. A rat weighs 3.5 pounds and costs $4.50 per week to feed, while a Beagle weighs 30 pounds and costs $9.20 per week to feed. Using weight as the explanatory ... 
math
please help me with this one too! : if it costs about $0.10 per week to feed a snake, how much does it cost to feed 35 snakes for 4 wks? 
Math
Zoe can feed six horses in one hour. Matt takes three times as long to feed that many horses. How long will it take them together to feed 32 horses? a) 2 hours b) 3 hours c) 4 hours d) 6 hours 
Alg
If 30 hamburgers feed 25 how many burgers feed 45 
biology
Trophic Level Cylinder Volume of H2O Volume of Oil Total Volume % Oil 1st 1000 ml 1000 ml 2nd 100 ml 100 ml 3rd 10 ml 10 ml 
biology
A species of bird with three toed feet feeds on worms and crawling insects. Over a period of several thousand years, the ocean level rises, and the region where the bird lives is flooded. Over several thousand years or so the birds descendant evolve webbed feet and begin to ... 
MathAlgebra
DMF Feeds has two different types of cattle feed containing crude protein in the amount of 45% and 20% respectively. How many of each type must a feed lot manager mix together to obtain 10000lbs of a mixture that is 25% protein? 
Math
A box of dog food would feed 5 dogs for 4 days. How long would it feed 8 dogs ? 
algebra
A chicken farm orders bags of feed from two farmers. Store X charges $20 per bag, and store Y charges $15 per bag. The farm must obtain at least 60 bags per week to care for the chickens properly. Store Y can provide a maximum of 40 bags per week, and the farm has committed to... 
statistics
18 young adults you need 108 cups of water and 72 cups of water show how to sclae down this ratio to feed 3 young adults 
Biology
Which trophic level gets the least amount of energy? a) producers b) herbivores c) carnivores d) decomposers I think the answer is c, but i'm not sure if it's right. I posted this question earlier, but google didn't provide with an answer. I still think the answer is C, ... 
biology
which animals eat butterflies? i know that birds do feed on butterflies even though they are hard to catch, but what else? please tell me any other animals that feed on butterflies. thanks you. 
4th grade
carol FRIEND ESMERALDA IS AWAY FOR 3 DAYS.SHE ASKED CARLO TO FEED HER PET DOG TWICE A DAY.CARLO FEED HIM ONE 8OUNCE CAN EVERY TIME HE GOES ESMERALDA'S HOUSE. HOW MANY CANS OF FOOD DOES ESMERALDA NEED TO BUY FOR THE THREE DAY VACATION? SHOW HOW YOU CALCULATEAD YOUR ANSWER. ... 
math
Write a proportion that is equivalent to the statement: If 2 pizzas can feed 7 people, then 6 pizzas can feed 21 people. 
math
Write a proportion that is equivalent to the statement: If 2 pizzas can feed 7 people, then 6 pizzas can feed 21 people. 
math
if it takes 8 quarts of ice cream to feed 30 people, how many quarts will it take to feed 75 people? 
English
* Approach level, On level, Beyond level (What are the meanings of the words? There are English problems with three levels in the text book. Approach level is for the beginners. On level is for the mediumlevel students. Beyond level is for the high level students. What is the... 
science
what are the trophic levels from a animal food web? 
Botany
Think of this example of an ecosystem: A large tree with grasshoppers, caterpillars and other animals eating the leaves, birds eating the leaf eaters, snakes eating birds and a hawk eating snakes. An energy pyramid that counts the number of organisms at each trophic level ... 
Statistics
In order to compare two kinds of feed, thirteen pigs are split into two groups, and each group received one feed. The following are the gains in weight (kilograms) after a fixed period of time: Feed A: 8.0 7.4 5.8 6.2 8.8 9.5 Feed B: 12.0 18.2 8.0 9.6 8.2 9.9 10.3 We wish to ... 
Math  Algebra 1
Each cow eats 4.5 cups of feed a day and the bucket it comes in contains 250 cups. The buckets cost $26.75 each. If a farm has 16 cows, how much will it cost to feed all of the cows for 1 week? (system of equations) Cost____________________ 
Chemistry
For this picnic, you need to feed at least 300 people. If you want to feed everyone, but still have equal numbers of buns and hot dogs, what is the minimum number of packages of buns and hot dogs you need, respectively? hot dogs= 10, buns=8 
AED
Select one of the age groups chosen in Week Six, decide on the child’s age, what level and stage he or she is at developmentally, and list some characteristics demonstrating the nature of the stage. Post in 200300 words. The following is what I have so far. I have only like... 
Math
These statements describe the depth at which two sea creatures are swimming. Note that sea level is equal to zero. The sixgill shark is swimming 8,200 feet below sea level. The fangtooth fish is swimming 6,500 feet below sea level. Complete this sentence. The sixgill shark ... 
Math
A farmer buys two varieties of animal feed. Type A contains ounces of oats and ounces of corn per pound. Type B contains ounces of oats and ounces of corn per pound. The farmer wants to combine the two feeds so that the resulting mixture has at least pounds of oats and at ... 
math
A farmer has enough food to last his 40 cattle 35 days. If he buys 50 cattle, how long can the same feed can last? Let X be the number of days the same feed can last 
Math please help! Im so confused!
it is estimated that at the turn of the 20th century, one farmer in the U.S could feed 25 people, whereas today, the ratio is about 1 to 130. How many farmers would it take today to feed 2600 people? Please help i don't even know how to do this problem! 
Environmental Science
only 10 percent of the energy is passed from one trophic level to the next. Explain where the other 90 percent of the available energy goes. Thank you for using the Jiskha Homework Help Forum BUT we are here to HELP you not to DO the work for you. It is flooding this board ... 
math
n (level 0) = 1 n (level 1) = 4 n (level 2) = 13 n (level 3) = 27 what is the n level ? it means n of any level .. I need an equation, pls ? 
Math
Sam needs to feed 10 dogs at the animal shelter. The dog food is sold in 5 pounds. How many bags of dog food will he need to feed the dog for an entire week? Estimate your answer.(first estimate then multiply) 
ScienceEcology
Why are food chains typically limited to 4 or 5 trophic levels? 
science
do your results support idea that trophic cascades occur in nature? 
Urgent help here! Math
If 270kg of corn would feed 42 horses for 21 days, for how many days would 360kg of it feed 21 horses? 
Math
Webster Aquatic Center offers various levels of swimming lessons yearround. The March 2005 Monday and Wednesday evening lessons included instructions from Water Babies through Adults. The number in each classification is given in the table that follows. Swim Lesson Types No. ... 
chemistry
I don't know how to explain or if Ive got my homework answer correct. The question is: A patient on dialysis has a high level of urea, a high level of sodium and a low level of potassium in the blood. Why is the dialyzing solution prepared with a high level of potassium but no... 
Biology organism classification
We have "made up" organism's based on real ones like these 2. Chemosynthetic goldfish that convert pollution to food (autotrophs) 3. Aquatic humanoids whose main diet is aquawheat and basking sharks. They have fins instead of legs (heterotrophs) 4. Aquawheat: one of the few ... 
Garden city university
patient on dialysis has a high level of urea, a high level of sodium and a low level of potassium in the blood. Why is the dialyzing solution prepared with a high level of potassium but no sodium or urea? 
math
lilt saw a jelly fish at 6 feet below sea level. She saw a blue fish at 10 feet below sea level. What is the distance between the blue fish and the jelly fish? Is the answer 4 feet? 
science
I have a question on homework. please help Sea otters are part of a giant kelp ecosystem. They feed on sea urchins that feed on kelp. How does hunting sea otters affect the population of sea urchins and kelp in the ecosystem? 
Math
Lisa’s pet shop has 2 fish tanks. Tank A contains smaller fish who are fed 1 gram of food each per day. Tank B contains larger fish who are fed 2 grams of food each per day. If Tank B contains 2/3 the number of fish that Tank A contains, will Lisa ever feed both tanks the ... 
Chemistry
patient on dialysis has a high level of urea, a high level of sodium and a low level of potassium in the blood. Why is the dialyzing solution prepared with a high level of potassium but no sodium or urea? 
Ms. Sue
Say you make the following assumptions: 1. Afarmer lives on 1 hen per day for a year. (2.)1 hen eats 25 grasshoppers per day (3.)1,000 grasshoppers have a mass of 1 kg (4.) 1 grasshopper requires about 30g of soy beans per year (5.) 1 human requires about 600 grasshoppers per ... 
English
Add brackets or dashes and other punctuation so these sentences are correct. i did 1 by my own. can you check it for me please? 1. I have lots of animals  sheep, goats, horses and fish  that i have to feed everyday. 2. we will need to think carefully about what we take with ... 
LERUNTSE LESEDI SEC SCHOOL
I completed my matric in 2013 and I am examted to diploma with the following subjects 1.Setswana78%=Level 6 2.English68%=Level 5 3.Afrikaans57%=Level 4 4.Maths literacy47%=Level 3 5.L.O58%=Level 4 6.Economics47%=Level 3 7.Business Studies43%=Level 3 My scoring points in... 
cultural diversity
What degree of intensity and individualization does tier 1 instruction represent? A. Low level of individualization, specialized intensive instruction B. High level of individualization, specialized intensive instruction C. Low level of individualization, general instruction D... 
Precalculuscheck answers
A farm supply store carries 50lb bags of both grain pellets and grain mash for pig feed. It can store 600 bags of pig feed. At least twice as many of its customers prefer the mash to the pellets. The store buys the pellets for $3.75 per bag and sells them for $6.00. It buys ... 
PreCalculuscheck answers
A farm supply store carries 50lb bags of both grain pellets and grain mash for pig feed. It can store 600 bags of pig feed. At least twice as many of its customers prefer the mash to the pellets. The store buys the pellets for $3.75 per bag and sells them for $6.00. It buys ... 
PreCalculuscheck answers
A farm supply store carries 50lb bags of both grain pellets and grain mash for pig feed. It can store 600 bags of pig feed. At least twice as many of its customers prefer the mash to the pellets. The store buys the pellets for $3.75 per bag and sells them for $6.00. It buys ... 
Math
2(a)Consider the arithmetic progression with terms A3=2 and A12=23. Find the sum of A1+......+A40 (can do) (b)In 1800 the population of England was 8 million. The economist Malthus (17661834) produced a hypothesis, suggesting:that the population of england would increase, ... 
series
2(a)Consider the arithmetic progression with terms A3=2 and A12=23. Find the sum of A1+......+A40 (can do) (b)In 1800 the population of England was 8 million. The economist Malthus (17661834) produced a hypothesis, suggesting:that the population of england would increase, ... 
Series
2(a)Consider the arithmetic progression with terms A3=2 and A12=23. Find the sum of A1+......+A40 (can do) (b)In 1800 the population of England was 8 million. The economist Malthus (17661834) produced a hypothesis, suggesting:that the population of england would increase, ... 
REACTION KINECTICS
The irreversible reaction 2A + B takes place in the gas phase in a constant temperature plug flow reactor. Reactant A and diluent gas are fed in equimolar ratio, and the conversion of A is 85 percent. If the molar feed rate of A is doubled, what is the conversion of A ... 
math 1
Example 3: The table below shows the amount a banquet hall charges to feed different sized groups of people Number Of People  COST 10 $200 14 $252 21 $441 23 $471 Using a linear model, what is the approximate residual value of the cost to feed 21 people Answer Choices: A.$8 B... 
math
a 40cm diameter birthday cake can feed 4 people.How many people will a 80 cm diameter cake feed? 
english
1. You have to feed the baby with water sometimes. 2. You have to feed water for the baby sometimes. 3. The baby must have peed. You have to change the diaper. The diaper is wet. Will you bring a new diaper? 4. The baby gave out dung. Bring me a baby tissue. I will clean that ... 
Urgent gr11 trig!!!
A tidal wave reaches low tide at 3:00AM and high tide at 3:00PM. The tide can rise and fall 10m from the sea level. If at low tide the water level is 2m above the seabed (bottom of the sea) a) determine an equation to model the sea level above the sea bed S and time t in hours... 
Marine Science
I've searched and read so many things but i have yet to find the answer that my teacher is looking for. What percentage of energy is transferred from a producer to a: (A) secondary consumer, (B) tertiary consumer, (C) quaternary consumer? 
linear programming
A feed company is developing a feed supplement from two grains A and B. Each kilogram of A contains 0.3 grams of protein and 0.2 grams of carbohydrates; each kilogram of B contains 0.9 grams of protein and 0.1 grams of carbohydrates. There must be at least 27 grams of protein ... 
Science
Hello, can anyone help me answer this question: What is the result of a silent mutation at a) DNA level b) amino acid level c) protein level d) phenotype level Thank you. 
English
1. Approach level 2. On level 3. Beyond level (What is the meaning of each level? Would you explain that in the ability of students?) 
7th Grade Lit
What is the complement of: a) "The snake looks hungry." b) "The lizard seemed stunned." c) "Its skin is scaly." d) "Scales cover a snakes body." e) "John will feed Izzy." f) "We will photograph Mary." g) "It feels sticky." answers a) hungry b) stunned c) scaly d) not sure e) ... 
statistics
Hearing levels or cockpit noise in an aircraft can damage the hearing of pilots who are exposed to this hazard for many hours. Noise level is described as Low=under 88 decibels, Medium=8891 decibels, High=92^decibels. At a = .05, is the cockpit noise level independent of ... 
Statistics !
Hi I have calculated some statistics using a spreadsheet program and I have to compare three slopes of regression and their significance level in an energy species hypothesis.. 2.11 level of significance is 5% 4.73 level of significance is 1% 4.13 level of significance is 1... 
Biology
Describe the relationship between the respiratory and the cardiovascular systems! Doesnt the respiratory feed the cardiovascular with oxygen, and getting rid of CO2 and water? Doesnt the cardiovascular system feed the respiratory system with a fluid for exchange of gases and ... 
Algebra
You want to purchase at least 10 tickets to a baseball game, but can spend at most $200. Lower level tickets &8 each, while upper level tickets cost $5. Write and graph a system of inequalities to represent the situation. Give two possible combinations of the number of lower ... 
Check Work
A poll was taken of 10,439 working adults aged 4070 to determine their level of education. The participants were classified by sex and by level of education. The results are shown below. Education Level Male Female Total High School or Less 2023 3264 5287 Bachelor's Degree ... 
statistics
A random sample of 80 youths and a second random sample of 120 adults showed that 18 of the youths and 10 of the adults had been ticketed for careless driving. Use a 1% level of significance to test the claim that youth have a higher proportion of careless drivers than adults ... 
Education/Technology
A teacher takes daily attendance and enters grades for report cards. This would be best served by software managed at which level? A) District level. B) Classroom level. C) Statewide level. D) National level. I think the answer is B but would like a second opinion please. 
math
Problem: A riding stable manager is planning a nutritional diet for 9 horses. The manager finds the table below in a guide about horse health. The cost of 1000 Calories of horse feed is $0.25. What is the cost per day to feed 9 horses? (Hint: First, try writing an expression ... 
ap bio
The number of trophic levels that can be maintained in an ecosystem is limited by: a. a gain in population size b. the loss of potential energy c. the number of individuals in the ecosystem i have chosen a but it is for a grade and i would love some help?? :) 
Science
Which trophic levels have the most biomass? Which have the most energy? Why? The second law of thermodynamics requires that the primary producers have the most biomass and total energy. See:http://www.physicalgeography.net/fundamentals/9o.html 
business statistics
In testing the independence of two variables described in a contingency table, determine the critical value of chisquare if the test is to be conducted at the a. á= 0.025 level and d f = 5 b. á = 0.05 level and d f = 8 c. á = 0.01 level and d f = 6 d. á = 0.10 level and d... 
biology
Assume that a mature female vegetarian consumed 2 pounds of food daily for one year. At the end of this one year, she weighed ½ pound more than she weighed at the beginning of that year. a. What was the percentage of biomass conversion at this trophic level? (hint: first, ...