Classify these examples of symbiosis by type and explain your choice: 1) Inside a human’s intestine live bacteria that make vita
min K; 2) A human picks up bacteria on his or her hands. The bacteria do not cause disease but do feed on the human’s dead skin cells; 3) A tick attaches itself to a human and feeds on the human’s blood.
Mutualism is an interaction between two species, in which both organizations benefit from this relationship. This is called a mutual benefit interaction. However, mutualism in the strict sense is not a binding relationship between the individuals involved.
Commensalism is a type of natural and frequent or systematic biological interaction between two living beings in which the host provides some of his own food to the commensal.
Parasitism is a biological relationship between two living beings where one of the protagonists (the parasite) takes advantage of a host organism to feed, shelter or reproduce.
The one which is responsible for transmitting an impulse across a synapse to another cell is the neurotransmitters. It allows the transmission of signals from one neuron to the next across synapses.
Amino acids. These class of compounds
are considered the building blocks of most organisms, and around 500 of these
are known and indentified. All proteins, carbohydrates, and nucleic acids are
polymers ("many units") and each unit is an amino acid.
