Areas with a similar climate, flora and fauna are:

The physical and chemical variables in the environments in ecosistems that have an impact on living things are:

Animals that cannot mantain a constant body temperature are:

As an adaptation to water scarcity, plants have leaves:

As an adaptation to high temperature, animals tend to be:

The areas in oceans where light cannot get are called:

Adaptations for lack of food can be:

Species that can live in a wide range of environmental factor are called:

A group of organisms of the same species that live in the same area are a:

Relationships between organisms of the same species in the ecosystems are called:

The relationship between a mother and her offspring is called:

The relationship between individuals not necessarily related that join for food, reproduction or migration is called:

In competition (individuals of different species that use the same limited resource):

The relationship between two organism in which both benefit but, if separated, both die, is called:

In the ecosystems, producers are:

In the ecosystems, secondary consumers are:

The simple, linear sequence of trophic relationships between individuals in a ecosystem is a:

The pyramids that can never be inverted are:

Species that have a big offspring and they take very little care of their youngs use a:

Species that have a mall offspring and they take a lot of care of their youngs use a:

When a new ecosystem is formed in a place where communities have disappeared due to an accident, that is a: