All arthropods Have Exoskeletons . Hope I helped
C.18
in middle school we are told the levels are 2,8,8 but once you reach high school, you find out the third level actaully can hokd up to 18.
If photosynthesis stopped, plants would stop converting carbon dioxide -- an air pollutant -- to organic material. ... Even if all the plants on Earth were to die, people would remain resourceful -- especially if their lives depended on it.
Answer;
-Neurotransmitters.
One of the first key terms she memorizes is neurotransmitters because these are the chemicals via which neurons communicate with each other.
Explanation;
-Neurons communicate with each other via electrical events called 'action potentials' and chemical neurotransmitters. At the junction between two neurons (synapse), an action potential causes neuron A to release a chemical neurotransmitter.
-Neurons are connected to each other through synapses, sites where signals are transmitted in the form of chemical messengers.
Commensalism, the crab benefits from the oyster but the oyster is neither benefited nor harmed.
