Lecture Exam 4

These flashcards cover key concepts related to invertebrates and vertebrates, including anatomy, physiology, and reproduction.

What are the two body forms of cnidarians?

Stationary polyp and moving medusa.

What is the first thing that happens after fertilization?

The first cell division occurs after fertilization, resulting in zygotes.

What controls muscle movements in animals?

Nerves control muscle movements.

Which group of arthropods do insects belong to?

Insects are defined by their number of legs.

What does the amniote egg provide for the developing organism?

It offers advantages for survival during development.

What is a notochord?

A flexible rod that supports the body in the embryonic stage of vertebrates.

What traits are unique to mammals?

Traits like hair, mammary glands, and three middle ear bones.

How do endotherms regulate their temperature?

Endotherms maintain their body temperature through metabolic processes.

What morphological feature makes sharks successful?

Their streamlined body and powerful fins.

What distinguishes primates from other groups?

Opposable thumbs are a key characteristic of primates.

What is incomplete metamorphosis?

A type of development where the organism does not have a pupil stage.

What molecule makes up the exoskeleton of arthropods?

Chitin.

Which is the most diverse group of insects?

Beetles are the most diverse group of insects.

How do insects exchange gases with their environment?

Through spiracles and a tracheal system.

What are disozoans and what are their morphological features?

Dizoans are a type of organism with specific morphological adaptations, including a cuticle.

What is trichinella?

Trichinella is a parasitic roundworm.