Vertebrate Reproduction

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Life cycle: ciclo de vida
Offspring: descendencia
To lay eggs: poner huevos
Survive: sobrevivir
Cubs: cachorros
To give birth: dar a luz
Nests: nidos
Predators: depredadores

Questions;

1; Frogs lay eggs; oviparous
    Turtles lay eggs; oviparous
    Fish lay eggs; oviparous
    Birds lay eggs; oviparous
    Polar bears give birth to live cubs; viviparous

2; The main difficulty for the oviparous animals is that they have to protect their eggs from predators.

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Oviparous animals include; Birds, fish, reptiles and amphibians

Viviparous animals include; almos all mammals

Ovoviparous animals; Tiger sharks

Questions;

3; The main danger that they face is that presented by predators

4; The eggs do not break because,,,,,,,


Invertebrates

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The main characteristic is that they do not have a backbone; No tienen columna vertebral

There are 6 main groups; Arthropods, Molluscs, Echinoderms, Annelids, Spomges, Cnidarians

Arthropods include; Crustaceans, Myriapods, Arachnids, Insects

Molluscs include; Gastropods, Bivalves and Cephalopods

Questions

2; Why are earthworms important for the environment?

3; Sponges which do not have circulatory or nervous systems and cannot move get their food by,,,,,

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How wings work:  (see youtube video)

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Endangered animals

Siberian Tiger

a) Diet; paragraph 3
b) Habitat; paragraph 1
c) Description; paragraph 2
d)Reason,,they are in danger ,,,,,,,; paragraph 5
e) Reproduction; paragraph 4