Bilateral Symmetry in Animals

Study Flashcards Play Quiz

Questions and Answers

Which type of symmetry is characteristic of animals in the Bilateria grade?

Bilateral symmetry

In which phylum are animals with bilateral symmetry included?

Platyhelminthes

What type of symmetry do adult Echinoderms typically have?

Radial symmetry

What is a key characteristic of animals in the Bilateria grade?

Presence of clearly differentiated head and distinct anterior end Signup and view all the answers

Which phyla are included in the Bilateria grade?

Platyhelminthes, Nematoda, Annelida, Mollusca, Arthropoda, Echinodermata, Hemichordata, Chordata Signup and view all the answers

What type of symmetry do adult Echinoderms typically have?

Radial symmetry Signup and view all the answers

What is a key characteristic of animals in the Bilateria grade?

Distinct anterior and posterior ends Signup and view all the answers

What is the defining feature of bilateral symmetry in animals?

The right side is approximately the same as the left side Signup and view all the answers

What type of symmetry do animals in the Bilateria grade typically exhibit?

Bilateral symmetry Signup and view all the answers

Which phylum includes animals that have secondarily developed radial symmetry as adults?

Echinodermata Signup and view all the answers

What is the defining feature of animals with bilateral symmetry?

Distinct anterior end Signup and view all the answers

Which animals are included in the Bilateria grade?

Annelida, Arthropoda, Chordata Signup and view all the answers

Which phylum includes animals that have secondarily developed radial symmetry as adults?

Echinodermata Signup and view all the answers

Which of the following phyla is not included in the Bilateria grade?

Cnidaria Signup and view all the answers

Which type of symmetry do adult Echinoderms typically have?

Radial symmetry Signup and view all the answers

Which characteristic is common to all animals included in the Bilateria grade?

Distinct dorsal and ventral surfaces Signup and view all the answers

Which phylum includes animals that have secondarily developed radial symmetry as adults?

Echinodermata Signup and view all the answers

What type of symmetry do adult Echinoderms typically have?

Radial symmetry Signup and view all the answers

What is a key characteristic of animals in the Bilateria grade?

Distinct anterior and posterior ends Signup and view all the answers

Which characteristic is common to all animals included in the Bilateria grade?

Distinct dorsal and ventral surfaces Signup and view all the answers

What type of symmetry do adult Echinoderms typically have?

Radial symmetry Signup and view all the answers

What is a key characteristic common to all animals included in the Bilateria grade?

Distinct anterior and posterior ends Signup and view all the answers

In which phylum are animals with bilateral symmetry included?

Arthropoda Signup and view all the answers

What is the defining feature of bilateral symmetry in animals?

Right side approximately same as left side Signup and view all the answers

Match the following phyla with their inclusion in the Bilateria grade:

Platyhelminthes = Included in the Bilateria grade Nematoda = Included in the Bilateria grade Arthropoda = Included in the Bilateria grade Echinodermata = Includes animals with secondarily developed radial symmetry as adults Signup and view all the answers

Match the following terms with their definitions:

Bilateral symmetry = Distinct anterior end and can be divided into two equal parts by an imaginary line in one plane Radial symmetry = Can be divided into equal parts by several planes passing through a central axis Triploblastic = Composed of three primary germ layers Coelomate = Has a true body cavity derived from mesoderm Signup and view all the answers

Match the following characteristics with their presence in animals of the Bilateria grade:

Distinct anterior and posterior ends = Present in animals of the Bilateria grade Dorsal and ventral surfaces = Present in animals of the Bilateria grade Acoelomate body plan = May be present in animals of the Bilateria grade Radial symmetry in adults = Present in Echinodermata due to their special mode of life Signup and view all the answers

Match the following phyla with their type of symmetry in adult animals:

Platyhelminthes = Bilateral symmetry Nematoda = Bilateral symmetry Mollusca = Bilateral symmetry Echinodermata = Secondarily developed radial symmetry Signup and view all the answers

Match the following phyla with their inclusion in the Bilateria grade:

Platyhelminthes = Included Nematoda = Included Cnidaria = Not included Echinodermata = Included Signup and view all the answers

Match the following phyla with their type of symmetry in adult animals:

Platyhelminthes = Bilateral Nematoda = Bilateral Cnidaria = Radial Echinodermata = Radial Signup and view all the answers

Match the following terms with their definitions:

Acoelomate = No body cavity Pseudocoelomate = Body cavity not completely lined with mesoderm Coelomate = Body cavity completely lined with mesoderm Triploblastic = Three germ layers (ectoderm, mesoderm, endoderm) Signup and view all the answers

Match the following characteristics with their presence in animals of the Bilateria grade:

Bilateral symmetry = Present Triploblastic = Present Radial symmetry = Not present Distinct anterior and posterior ends = Present Signup and view all the answers

Animals with bilateral symmetry can be divided into two equal parts by an imaginary line in more than one plane.

False Signup and view all the answers

All animals included in the Bilateria grade are triploblastic.

True Signup and view all the answers

Adult Echinoderms have secondarily developed radial symmetry due to their special mode of life.

True Signup and view all the answers

Animals with bilateral symmetry typically exhibit clearly defined dorsal and ventral surfaces.

True Signup and view all the answers

Animals with bilateral symmetry can be divided into two equal parts by an imaginary line only in one ______

plane Signup and view all the answers

Adult Echinoderms have secondarily developed ______ symmetry due to their special mode of life

radial Signup and view all the answers

The animals included in grade Bilateria are all ______

triploblastic Signup and view all the answers

The animals in the Bilateria grade typically exhibit clearly defined dorsal and ventral ______

surfaces Signup and view all the answers

Animals with bilateral symmetry can be divided into two equal parts by an imaginary line only in one ______

plane Signup and view all the answers

What is the defining feature of bilateral symmetry in animals?

distinct anterior end Signup and view all the answers

Animals in the Bilateria grade typically exhibit clearly defined dorsal and ventral ______

surfaces Signup and view all the answers

All animals included in the Bilateria grade are ______

triploblastic Signup and view all the answers

Explain the defining characteristics of animals with bilateral symmetry and provide examples of phyla included in this group.

Animals with bilateral symmetry have a body plan where the right side is approximately the same as the left side, with a distinct anterior and posterior end. They can be divided into two equal parts by an imaginary line in only one plane and typically have clearly defined dorsal and ventral surfaces. Phyla included in this group are Platyhelminthes, Nematoda, Annelida, Mollusca, Arthropoda, Echinodermata, Hemichordata, and Chordata. Signup and view all the answers

Describe the development of radial symmetry in adult Echinoderms and explain why it occurs.

Adult Echinoderms have secondarily developed radial symmetry due to their special mode of life. Their larvae initially exhibit bilateral symmetry, but as they mature and adapt to their specific ecological niche, they develop radial symmetry as a more advantageous body plan for their lifestyle. Signup and view all the answers

Discuss the triploblastic nature of animals included in the Bilateria grade and explain the possible body cavity types they may exhibit.

All animals included in the Bilateria grade are triploblastic, meaning they have three germ layers: ectoderm, mesoderm, and endoderm. They may be acoelomate, pseudocoelomate, or coelomate, depending on the presence and formation of a body cavity. Signup and view all the answers

Explain the significance of the distinct anterior and posterior ends in animals with bilateral symmetry and how this relates to their body plan.

The distinct anterior and posterior ends in animals with bilateral symmetry provide orientation and directionality. The presence of a clear anterior end often indicates the location of sensory organs and the direction of movement, while the posterior end may be associated with waste elimination and locomotion. This orientation contributes to the overall functionality of their body plan and behavior. Signup and view all the answers

Study Notes

Characteristics of Bilateria

Animals with bilateral symmetry, where the right side is approximately the same as the left side and has a distinct anterior end.
Can be divided into two equal parts by an imaginary line only in one plane.
Typically have a clearly differentiated head at the anterior end and a distinct posterior end.
Have clearly defined dorsal and ventral surfaces.

Phyla Included in Bilateria

Phyla included in this grade are Platyhelminthes, Nematoda, Annelida, Mollusca, Arthropoda, Echinodermata, Hemichordata, and Chordata.

Echinodermata

Have developed bilateral symmetry, evident from the study of their larvae structure.
Adult Echinoderms have secondarily developed radial symmetry due to their special mode of life.

Body Structure

All animals in grade Bilateria are triploblastic.
May be acoelomate, pseudocoelomate, or coelomate.

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Bilateral Symmetry in Animals

Questions and Answers

Which type of symmetry is characteristic of animals in the Bilateria grade?

In which phylum are animals with bilateral symmetry included?

What type of symmetry do adult Echinoderms typically have?

What is a key characteristic of animals in the Bilateria grade?

Which phyla are included in the Bilateria grade?

What type of symmetry do adult Echinoderms typically have?

What is a key characteristic of animals in the Bilateria grade?

What is the defining feature of bilateral symmetry in animals?

What type of symmetry do animals in the Bilateria grade typically exhibit?

Which phylum includes animals that have secondarily developed radial symmetry as adults?

What is the defining feature of animals with bilateral symmetry?

Which animals are included in the Bilateria grade?

Which phylum includes animals that have secondarily developed radial symmetry as adults?

Which of the following phyla is not included in the Bilateria grade?

Which type of symmetry do adult Echinoderms typically have?

Which characteristic is common to all animals included in the Bilateria grade?

Which phylum includes animals that have secondarily developed radial symmetry as adults?

What type of symmetry do adult Echinoderms typically have?

What is a key characteristic of animals in the Bilateria grade?

Which characteristic is common to all animals included in the Bilateria grade?

What type of symmetry do adult Echinoderms typically have?

What is a key characteristic common to all animals included in the Bilateria grade?

In which phylum are animals with bilateral symmetry included?

What is the defining feature of bilateral symmetry in animals?

Match the following phyla with their inclusion in the Bilateria grade:

Match the following terms with their definitions:

Match the following characteristics with their presence in animals of the Bilateria grade:

Match the following phyla with their type of symmetry in adult animals:

Match the following phyla with their inclusion in the Bilateria grade:

Match the following phyla with their type of symmetry in adult animals:

Match the following terms with their definitions:

Match the following characteristics with their presence in animals of the Bilateria grade:

Animals with bilateral symmetry can be divided into two equal parts by an imaginary line in more than one plane.

All animals included in the Bilateria grade are triploblastic.

Adult Echinoderms have secondarily developed radial symmetry due to their special mode of life.

Animals with bilateral symmetry typically exhibit clearly defined dorsal and ventral surfaces.

Animals with bilateral symmetry can be divided into two equal parts by an imaginary line only in one ______

Adult Echinoderms have secondarily developed ______ symmetry due to their special mode of life

The animals included in grade Bilateria are all ______

The animals in the Bilateria grade typically exhibit clearly defined dorsal and ventral ______

Animals with bilateral symmetry can be divided into two equal parts by an imaginary line only in one ______

What is the defining feature of bilateral symmetry in animals?

Animals in the Bilateria grade typically exhibit clearly defined dorsal and ventral ______

All animals included in the Bilateria grade are ______

Explain the defining characteristics of animals with bilateral symmetry and provide examples of phyla included in this group.

Describe the development of radial symmetry in adult Echinoderms and explain why it occurs.

Discuss the triploblastic nature of animals included in the Bilateria grade and explain the possible body cavity types they may exhibit.

Explain the significance of the distinct anterior and posterior ends in animals with bilateral symmetry and how this relates to their body plan.

Study Notes

Characteristics of Bilateria

Phyla Included in Bilateria

Echinodermata

Body Structure

Studying That Suits You

More Quizzes Like This

Zoology Practice Questions and Test for NEET 2024

Lecture 10: Multicellular Organisms and Bilateral Symmetry in Animals

Bilateral Symmetry in Nature Quiz and Flashcards

Bilateral Symmetry in Embryonic Development