Which one of these is not an example of intracellular communication?
a. a signal is translated to cause muscle contraction.

b. a muscle cell action is coordinated.

c. a muscle cell maintains homeostasis.

d. a nerve cell stimulates a muscle cell to contract.

Answer ( clear);

The awnser is d because of the topic 

The carbon dioxide that the plants intake clean the air and remove pollution. the plants release oxygen into the air as photosynthesis occurs, giving other organism the air they need to breathe. the sugars that the plant creates gives it energy and create carbohydrates in food producing plants.  chloroplasts, are located in the leaves of most plants, are organelles found inside of mesophyll cells and are where photosynthesis actually takes place.pigments absorb the sunlight into the photosynthetic organism.  stomates are found primarily in the lower epidermis of leaves. stomates are small holes that open and close as needed to allow co2 to enter and o2 to exit.hope my answer is what you are looking for : )

The answer is b. photochemical smog.hope my answer is : )