In which TWO ways will a dog contribute to the carbon cycle? It will release carbon dioxide in the atmosphere through respiration.

It will take in carbon dioxide from the atmosphere.

Its feces will contain carbon that will enter the geosphere.

It will convert carbon to a form that will be used by plants for energy.

It will decompose the body of plants to release carbon dioxide.

A & C

Explanation: Animals are consumers and all of they food they eat contains carbon which is then passed out in feces and returned to the earth through what is essentially a lesser form of decomposition. Dogs also breathe just like us by taking in oxygen and breathing out co2 which contributes to the carbon cycle as well.

cells use diffusion to get substances in and out of themselves. that diffusion will occur across the cell membrane or the outer covering of the cell. because we are talking about the surface of the cell, surface area and volume are  important factors here. as a cell increases in size, its surface area and volume increase as well.  we call that the surface area to volume ratio (sa: vol).  but the catch is that  volume increases at a greater rate than surface  area. in other words, as a cell gets bigger, the sa: vol gets smaller. so a really small cell like bacteria is mostly cell membrane (surface) with very little contents (volume). a really big cell like an egg, is mostly insides with a super thin membrane. so what ends up happening is that the cell cannot efficiently diffuse all of the stuff it needs in/out to survive. therefore cell size is limited to about 100mm. so how do we make organisms bigger than 100mm? cells divide! by dividing and becoming multicellular, organisms are able to grow!   check out the diagrams i attached to see the effect of sa: vol. i hope this ! good luck!

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