40 points and brainliest.

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1- Fire uses the energy, The heat is required, it is the part of the chemical reaction. Heat reacts with the fuel and oxygen to ignite it.

2- Bacteria as the decomposers gets rid of the wastes. It breaks down the organic material such as the remains of dead organisms.

3- Fire grows and develops, The fire has different stages. If its not controlled in its initial stages it could grow and develop into really big destruction.

4- Bacteria can sense and respond to stimuli. There is phototactic and chemotactic movement found in bacteria.

5- Bacteria has ways to protect itself from har.sh environment. They can form colony and work together against the changes, also they can form the hard cyst to protect themselves from the unfavorable conditions.

6- Bacteria reproduces, It has different ways of reproduction i.e. Trans.duction, Transf.ormation, conju.gation.

7- Wrist.watch have a def.ined boun.dary as it is not a living thing it can't gr.ow, it does not have 8 chara.cteristics of li.fe.

8- Wrist.watch has internal organization which help them to carry out basic functions

9- Algae are made of more than one cells

Best Regards,'Borz'

Neurotransmitters are messengers responsible for communication between neurons. they are released from synaptic vesicles and are received by receptors.  the communication is referred to as neurotransmission. the following statement is true about neurotransmitters: a. they're stored in synaptic vesicles in the axon.

answer: carbon 14 can only be used to determine the age of the organisms that were once living, and igneous rocks are non living.

explanation:

carbon 14 dating is used to determine the age of the sample by estimating the amount of carbon 14 present in the sample and then comparing it with a reference standard.carbon 14 is a isotope of carbon which is radioactive and unstable. carbon 14 is assimilated by all plants and animals throughout their life from carbon dioxide. however, one the organisms die they stop this assimilation and the carbon 14 content starts to decrease.by knowing how much of carbon 14 is left in an organism after his death, one can estimate the age of the organism. the materials whose age can be estimated by carbon 14 method are the organic compounds. however, some inorganic compounds such as aragonite   shell can also be dated.however, if we consider the igneous rocks it is a non living component which never accumulated carbon 14 in it and thus, we cannot use carbon 14 dating method to estimate its age.