Decide if these sentences are true or false. Be careful because each mistake discounts a right answer:

a) Intraspecific relationships occur between individuals of the same species.

b) Interspecific relationships occur between individuals of the same species.

c) Biotic factors are the variables of a biotope or physical environment that affect living things.

d) The chemical composition of the soil is a biotic factor because plants absorb water and mineral salts from it.

e) An ecosystem consists of a biotope, a biocenosis and the interactions between the biotope and the organism that live in it.

f) Predation is a type of interspecific relationship in which a predator feeds on a prey.

g) Family is a type of interspecific relationship and it is formed of, at least, one male and female of the same species and the offspring.

h) Symbiosis consists in two or more individuals from different species living closely together in a competition relatioship.