MYTUTOR SUBJECT ANSWERS

577 views

Explain the energy flow in a food chain.

▪       Energy enters most communities as light, where it is absorbed by autotrophs (e.g. plants) and converted into chemical energy via photosynthesis

▪       Energy then gets passed to the primary consumer (herbivore) when they eat the plant, and then gets passed to successive consumers (carnivores) as they are eaten in turn

▪       Energy is lost between trophic levels in the form of heat through cell respiration, faeces, tissue loss and death.

▪       Some of this lost energy is used by detritivores and saprotrophs. These in turn also lose energy in the form of heat through cell respiration. 

 

à Only ~10% of energy is passed from one trophic level to the next, the rest is lost.  

Because ~90% of energy is lost between trophic levels, the number of trophic levels are limited as energy flow is reduced at higher levels

Zana Katarina L. IB Biology tutor, IB Maths tutor, IB Psychology tutor

2 years ago

Answered by Zana Katarina, an IB Biology tutor with MyTutor


Still stuck? Get one-to-one help from a personally interviewed subject specialist

25 SUBJECT SPECIALISTS

£20 /hr

Erin B.

Degree: Biomedical Sciences (Bachelors) - Durham University

Subjects offered: Biology, Spanish+ 1 more

Biology
Spanish
Maths

“About me: I am currently in my first year studying Biomedical Sciences at Durham University. Prior to coming to the U.K., I completed the International Baccalaureate Diploma Program at an international school in Tokyo, Japan. I come ...”

MyTutor guarantee

£20 /hr

Fanis M.

Degree: biochemistry with proffesional/Industrial experience (Bachelors) - Manchester University

Subjects offered: Biology, Chemistry

Biology
Chemistry

“Second year biochemistry undergraduate, tutoring for IB/IGCSE chemistry and biology.”

£20 /hr

Michelle M.

Degree: Biological Sciences (Bachelors) - Edinburgh University

Subjects offered: Biology

Biology

“About me: I am a third year biological science student at the University of Edinburgh who is planning to continue on as a pHD candidate in the Life Sciences, maybe biotechnology, mammalian synthetic biology, molecular neuroscience or ...”

About the author

£20 /hr

Zana Katarina L.

Degree: Psychology (Bachelors) - Durham University

Subjects offered: Biology, Psychology+ 1 more

Biology
Psychology
Maths

“Top tutor from the renowned Russell university group, ready to help you improve your grades.”

MyTutor guarantee

You may also like...

Posts by Zana Katarina

Describe one example of transient polymorphism.

Discuss the relative importance of genetic and cultural evolution in the recent evolution of humans.

Analyze the changes in concentration of atmospheric carbon dioxide using historical records.

Behaviour can be innate because it is genetically based and can be inherited.

Other IB Biology questions

Outline the use of polymerase chain reaction (PCR) to copy and amplify minute quantities of DNA.

What are the key elements of an internal investigation?

Explain the differences between primary, secondary and tertiary protein structure.

Outline the process of active transport.

View IB Biology tutors

Cookies:

We use cookies to improve our service. By continuing to use this website, we'll assume that you're OK with this. Dismiss

mtw:mercury1:status:ok