# data[].attributes.attachment_link.title
Symbaloo: Bookmarks & Favorites - The #1 Homepage for Educators

# data[].attributes.attachment_link.description
Easily save, share, and organize your favorites with Symbaloo; the best online bookmark manager for educators. Use Symbaloo as a homepage on any browser or Internet-enabled device. Create a free account today!

# data[].attributes.attachment_link.readable_text
Foros Currículos Blog Descargas Temario Aviso legal Contacto

¡Bienvenidos a Biologia-Geologia.com, tu página de Biología y Geología!

¿Estás interesado en aprender más sobre los maravillosos misterios de la vida y la Tierra? ¡No busques más! Aquí encontrarás libros de texto gratuitos de varios cursos de materias relacionadas con la biología y geología. Contiene recursos, actividades, vídeos, etc. y todo lo necesario para la Biología y Geología de ESO y Bachillerato.

Ya seas estudiante de secundaria, un profesor o profesora o simplemente alguien que busca ampliar su conocimiento, tenemos algo para ti. Recursos didácticos que poco a poco van creciendo y evolucionando sobre biología y geología.

Para el alumnado con desconocimiento del español está disponible, en la parte superior de la página, el traductor de Google. También está disponible un buscador para buscar cualquier contenido de nuestras páginas. Puedes preguntar o ayudar a otros usuarios a través de nuestros foros sobre biología y geología.

Materias disponibles

Materiales didácticos para Biología y Geología. Libros, apuntes, actividades, vídeos y todo lo necesario para la enseñanza de Biología y Geología

© 2023 Biología-Geología.com
Contacto

# data[].attributes.attachment_link.title
Materiales didácticos para Biología y Geología. Libros, apuntes, actividades, vídeos y todo lo necesario para la enseñanza de Biología y Geología

# data[].attributes.attachment_link.description
Foros Currículos Blog Descargas Temario Aviso legal Contacto ¡Bienvenidos a Biologia-Geologia.com, tu página de Biología y Geología! ¿Estás interesado en aprender más sobre los maravillosos misterios de la vida y la Tierra? ¡No busques más! Aquí encontrarás libros de texto gratuitos de varios cursos de materias relacionadas con la biología y geología.

# data[].attributes.body
Reptiles are ectothermic vertebrates. They are mostly terrestrial, although some are adapted to an aquatic environment.

- Skin covered with scales that prevent from drying out.

- The body consists of a head, neck, torso, and tail. Except for snakes, all reptiles have four short limbs.
- The main sense organs are in the head.

- Except for some lizards, reptiles are carnivores. Apart from tortoises and turtles, they have teeth.

- They have two lungs more evolved than those found in amphibians.

- Sexual reproduction with internal fertilization. Generally oviparous.

- Reptiles eggs have a hard, porous covering that prevent the embryo from drying out.

- They live in hot climates.

# data[].attributes.body
Mammals are endothermic vertebrates. Many mammals live on land, but some are aquatic, and some groups are adapted for flight.
- Body covered by hair that allows them to maintain body temperature and provides camouflage.

- They have mammary glands that produce milk for feeding young after birth.

- Their limbs have the same anatomical pattern.

- Feeding habits are varied.

- They all breathe with lungs.

- They use sexual reproduction with internal fertilization and generally, they are viviparous.

- There are three groups of mammals: monotremes, marsupials and placentals.

# data[].attributes.body
Fish are ectothermic aquatic vertebrates with a head, torso, and tail. Their body is covered with scales, except for the head.

Agnathans are the most primitive fish known and they had no jaws. Some species like lampreys still exist. They lie eggs in rivers and live in the sea and suction through their mouth full of teeth and breathe through gills.

First fish with jaws appeared later and developed paired fins. Placoderms were one of the main groups of fish with jaw that became extinct. The others kept evolving till today.

# data[].attributes.body
Birds are terrestrial endothermic vertebrates; they maintain their body temperature independently of their environment. Because of this, they can live in any type of climate. However, some birds migrate to escape low or high temperatures.
Birds do not chew their food; they store and soften it in part of the esophagus called the crop. The stomach is a muscular area, and the gizzard helps to grind the food.
They breathe with lungs which are connected to air sacs. This increases their pulmonary capacity and the amount of oxygen taken in.

# data[].attributes.body
Amphibians are ectothermic vertebrates with bare skin. They live in two different environments: aquatic and terrestrial.

Even if adults are adapted to terrestrial life, they need water at some point to complete their life cycle. Their eggs need to be placed in water as they do not have protective coverings so would dry out and die.