Biology of Animals Quiz

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What does the biological definition of an 'animal' refer to?

All members of the kingdom Animalia (correct)

All members of the kingdom Plantia

Only mammals and birds

Only non-human animals

What does being monophyletic in the context of the animal kingdom imply?

Phyla are grouped based on geographic location

All taxa evolved from a single common ancestor (correct)

Animals originated from multiple ancestors

There are many overlapping species among taxa

How many recognized animal phyla are there in the animal kingdom?

35 (correct)

50

20

10

What is a key characteristic of clades in the animal kingdom?

They are monophyletic groups sharing a common ancestor Signup and view all the answers

What is true about the species diversity within the animal kingdom?

Over 1 million known animal species exist Signup and view all the answers

What defines a pseudocoelomate organism?

An organism with a fluid-filled space between endoderm and mesoderm Signup and view all the answers

Which characteristic is NOT commonly shared among all animals?

The ability to reproduce sexually Signup and view all the answers

What is a common advantage of multicellularity compared to unicellularity?

Higher environmental adaptability Signup and view all the answers

Why do researchers study animal diversity and evolution?

To learn common principles that apply across species Signup and view all the answers

Which physiological process is governed by the laws of physics and chemistry?

Membrane function Signup and view all the answers

Which type of cleavage occurs in protostomes?

Spiral cleavage Signup and view all the answers

What is a defining feature of animals with bilateral symmetry?

Presence of a specialized head with sensory organs Signup and view all the answers

Which of the following statements about coelomates is true?

The coelom lies between the gut and body wall. Signup and view all the answers

What type of body symmetry allows an organism to be divided equally by any longitudinal plane?

Radial symmetry Signup and view all the answers

What distinguishes diploblastic organisms from triploblastic organisms?

Presence of two germ layers Signup and view all the answers

What advantage does segmentation provide to bilaterally symmetrical animals?

Enhanced independent movement of body parts Signup and view all the answers

Which type of animal lacks a body cavity entirely?

Acoelomate Signup and view all the answers

Which of the following describes a characteristic of deuterostomes?

Radial cleavage occurs during early development Signup and view all the answers

What property of animal kingdom is indicated by the term 'monophyletic'?

All taxa share a common ancestor Signup and view all the answers

What type of body cavity originates from the outpocketings of the archenteron?

Enterocoelom Signup and view all the answers

What is a defining characteristic of animal cells in comparison to plant cells?

Animal cells lack cell walls. Signup and view all the answers

Which of the following best describes the process following fertilization in the development of an animal?

Zygote forms a morula followed by a blastula. Signup and view all the answers

How do protostomes and deuterostomes differ in their mesoderm formation?

Mesoderm in protostomes arises as a split in the mesoderm. Signup and view all the answers

Which term describes the hollow sphere of cells formed during early development in animals?

Blastula Signup and view all the answers

During embryonic development, what occurs in the process of gastrulation?

The blastula invaginates to form germ layers. Signup and view all the answers

What are the germ layers formed during gastrulation?

Ectoderm, Endoderm, Mesoderm Signup and view all the answers

What is a common trait of animals regarding their reproductive mechanisms?

Most animals undergo some form of sexual reproduction. Signup and view all the answers

What type of cleavage do deuterostomes display during early embryonic development?

Radial cleavage Signup and view all the answers

What is the fate of the first few cells produced in deuterostomes during cleavage?

They can develop into any type of cell at this stage. Signup and view all the answers

Which characteristic is typically NOT associated with multicellular animals?

Unicellular lifestyle throughout life Signup and view all the answers

How do embryonic development patterns influence animal body plans?

They influence symmetry and germ layer arrangement. Signup and view all the answers

What is the primary function of the extracellular matrix in animal tissues?

To provide tissue stability. Signup and view all the answers

What is true about the reproduction of most animals?

Sexual reproduction is the most common form. Signup and view all the answers