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In terms of ecological pyramids, how can pyramids of numbers sometimes be a different shape from pyramids of biomass, even for the same food chain?

Ecological pyramids are a way of visualizing a food chain, either with the mass of organisms or the total number of the population of organims at each stage of the food chain. Pyramids of biomass are always ...
RN
Answered by Robynne N. • Biology tutor
19210 Views

Why are active transport and diffusion different?

Active transport is the movement of molecules, usually against the concentration gradient (going from low concentration into a higher concentration), and it requires energy. Diffusion is the movement of mole...
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Answered by Victoria C. • Biology tutor
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What is eutrophication? Explain how this process can cause harm to the environment, particularly when farmers apply fertiliser to their land.

Eutrophication describes a process wherein a substance containing excessive levels of nutrients, in this case fertiliser, is applied to land and leaches off into nearby bodies of water (often as a result of ...
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Answered by James C. • Biology tutor
3159 Views

What is the function of bile in digestion?

Bile is used in the digestive system to emulsify fats. This means that it breaks down the fats into smaller fat droplets creating a larger surface area for the digestive enzymes to work on.
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Answered by Poppy K. • Biology tutor
7560 Views

Explain how energy moves through a habitat in a food chain.

The sun provides the initial energetic input for most terrestrial and aquatic ecosystems. Producers (commonly green plants) transform sunlight into food via photosynthesis where light energy is converted to ...
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Answered by Sam G. • Biology tutor
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