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This tutorial introduces mitochondria

common student misconception that plants do only photosynthesis, and only animals do cellular respiration.

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Photosynthesis (video) | Khan Academy

Only plants can do photosynthesis.Photosynthesis is the process of harnessingenergy from sunlight to generate chemical energy,which can be stored and used later. Thisstored chemical energy comes from the conversionof inorganic carbon (carbon dioxide) into organiccarbon, or food. Every living thing needs a sourceof stored energy for survival, even plants! Thinkof the stored energy as a battery, which isproviding energy not just for muscle movement(which plants obviously don't worry about), butfor all of the essential processes of life (cellgrowth and repair, for example). Living thingsthat can not harness and store energy themselvesthrough photosynthesis (and this includes humans,animals, insects, bacteria, viruses) HAVE to usethe energy harnessed and stored by plants tosurvive, or their battery runs out. Only plantshave the ability to recharge the batteries, soliving organisms are dependent on plants. Theprocess that releases the energy stored in thesebatteries is called the Krebs cycle.

At night, there is no sunlight to fuel photosynthesis, so plants only do cellular respiration.

So I said with a VERY small exception, everyliving thing relies on plant matter for survival. Some special bacteriathat live deep in the ocean, far away fromsunlight, have evolved the ability to convertcarbon dioxide into organic matter (store energy)without using energy from sunlight. These bacteria storeenergy from chemical reactions, a process which isless efficient than storing energy from sunlightbut since there's no sunlight, it's the only wayof harnessing and storing energy (recharging thebatteries). This process is not calledPHOTOsynthesis (the synthesis of organicmatter from light energy) butCHEMOsynthesis (the synthesis of organicmatter from chemical energy). These specialbacteria are kept as symbionts inside the bodiesof deep-sea animals, so some deep-sea communitiesdo not rely on plant matter. Other deep-seacommunities do, however.

Function Lysosomes are only needed by animal cells

Mar 20, 2008 · Only people and animals use cellular respiration for energy. Plants only go through two phases of photosynthesis, light-dependent reactions and …

The fact of the matter is, plants areincredibly special because only plants can dophotosynthesis. For this reason, every organism onearth ultimately relies on plants for its survival(with a few exceptions, which I'll discuss later).Even animals that eat only meat, hunting andcatching their food as prey, ultimately rely onplants for survival because the prey are eatingplants, or are eating insects that are eatingplants, or are eating animals that are eatinganimals that are eating plants, etc.

The carbon dioxide gas you exhale is the result of a completed cycle of cellular respiration.Only plants can photosynthesize, but both plants and animals depend on respiration to release the chemical potential energy originally captured through photosynthesis.The figure illustrates how closely photosynthesis and respiration are linked.

They help break down and remove old worn out cell parts

In short: animals only do cellular respiration. Plants do cellular respiration and photosynthesis. 5. Checking Understanding. Click here to start quiz

Other sections include plants, animal systems, invertebrates, vertebrates, and microorganisms.
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