4 Landlife: The vertebrate story at Wageningen University

Flashcards and summaries for 4 Landlife: The vertebrate story at the Wageningen University

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Study with flashcards and summaries for the course 4 Landlife: The vertebrate story at the Wageningen University

Exemplary flashcards for 4 Landlife: The vertebrate story at the Wageningen University on StudySmarter:

So salamanders have a tympanum?

Exemplary flashcards for 4 Landlife: The vertebrate story at the Wageningen University on StudySmarter:

Does a frog have a tympanum?

Exemplary flashcards for 4 Landlife: The vertebrate story at the Wageningen University on StudySmarter:

How many middle ear bones do reptiles have?

Exemplary flashcards for 4 Landlife: The vertebrate story at the Wageningen University on StudySmarter:

Which two evolutionary trends characterise gnathostomes?

Exemplary flashcards for 4 Landlife: The vertebrate story at the Wageningen University on StudySmarter:

Where and how did the first tetrapods live?

Exemplary flashcards for 4 Landlife: The vertebrate story at the Wageningen University on StudySmarter:

What is the chiridium by which tetrapods are characterised?

Exemplary flashcards for 4 Landlife: The vertebrate story at the Wageningen University on StudySmarter:

All modern fish except the cyclostomes belong to:

Exemplary flashcards for 4 Landlife: The vertebrate story at the Wageningen University on StudySmarter:

Homology:

Exemplary flashcards for 4 Landlife: The vertebrate story at the Wageningen University on StudySmarter:

What are labyrinthodonts?

Exemplary flashcards for 4 Landlife: The vertebrate story at the Wageningen University on StudySmarter:

Analogy:

Exemplary flashcards for 4 Landlife: The vertebrate story at the Wageningen University on StudySmarter:

What were the earliest fishes?

Exemplary flashcards for 4 Landlife: The vertebrate story at the Wageningen University on StudySmarter:

In many later fish groups there was a tendency for ossification to extend to the internal skeleton but what happened to bone in chondrichthyans, acipenseri and lungfish?

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Exemplary flashcards for 4 Landlife: The vertebrate story at the Wageningen University on StudySmarter:

4 Landlife: The vertebrate story

So salamanders have a tympanum?

No

4 Landlife: The vertebrate story

Does a frog have a tympanum?

Yes

4 Landlife: The vertebrate story

How many middle ear bones do reptiles have?

1

4 Landlife: The vertebrate story

Which two evolutionary trends characterise gnathostomes?

  1. Chondrichtyans lose perichondral bone this is replaced by calcified cartilage
  2. Osteichthyans gain bone as part of their endoskeleton

4 Landlife: The vertebrate story

Where and how did the first tetrapods live?

They lived mostly in water but could use their limbs to navigate the shallow fresh water where they lived

4 Landlife: The vertebrate story

What is the chiridium by which tetrapods are characterised?

A muscular limb with well defined joints and digits

4 Landlife: The vertebrate story

All modern fish except the cyclostomes belong to:

Chondrichthyes or osteichtyes

4 Landlife: The vertebrate story

Homology:

Common ancestry

4 Landlife: The vertebrate story

What are labyrinthodonts?

Fossil amphibia, the first ones to make the transition to land

4 Landlife: The vertebrate story

Analogy:

Functional convergence

4 Landlife: The vertebrate story

What were the earliest fishes?

Ostracoderms

4 Landlife: The vertebrate story

In many later fish groups there was a tendency for ossification to extend to the internal skeleton but what happened to bone in chondrichthyans, acipenseri and lungfish?

Bone was secondarily lost or reduced

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