Podcast
Questions and Answers
Members of phyla Echiura and Sipuncula are ______ marine animals with unsegmented bodies.
Members of phyla Echiura and Sipuncula are ______ marine animals with unsegmented bodies.
benthic
Annelids are ______ coelomates in superphylum Lophotrochozoa.
Annelids are ______ coelomates in superphylum Lophotrochozoa.
protostome
Annelids have bodies composed of a series of fused ______.
Annelids have bodies composed of a series of fused ______.
rings
The evolutionary innovation shown by annelids is ______ (metamerism).
The evolutionary innovation shown by annelids is ______ (metamerism).
Signup and view all the answers
Many annelids have ______ bristles called setae.
Many annelids have ______ bristles called setae.
Signup and view all the answers
Segmentation evolved separately in annelids, ______, and chordates.
Segmentation evolved separately in annelids, ______, and chordates.
Signup and view all the answers
Polychaetes are mostly ______ and mostly ______.
Polychaetes are mostly ______ and mostly ______.
Signup and view all the answers
Some polychaetes are ______ and live under rocks, burrow into sediment, or build their own tubes.
Some polychaetes are ______ and live under rocks, burrow into sediment, or build their own tubes.
Signup and view all the answers
Sedentary forms often have elaborate devices for ______ and respiration.
Sedentary forms often have elaborate devices for ______ and respiration.
Signup and view all the answers
Gonads are temporary structures in ______.
Gonads are temporary structures in ______.
Signup and view all the answers
Many polychaetes have respiratory ______ such as Hemoglobin, chlorocruorin or hemerythrin.
Many polychaetes have respiratory ______ such as Hemoglobin, chlorocruorin or hemerythrin.
Signup and view all the answers
Coelomic fluid enters the ______ through the nephrostome.
Coelomic fluid enters the ______ through the nephrostome.
Signup and view all the answers
The class Oligochaeta includes ______ and many freshwater worms.
The class Oligochaeta includes ______ and many freshwater worms.
Signup and view all the answers
[Blank] help prevent slipping while burrowing.
[Blank] help prevent slipping while burrowing.
Signup and view all the answers
Earthworms can burrow deep underground and remain dormant in a ______ chamber during dry weather.
Earthworms can burrow deep underground and remain dormant in a ______ chamber during dry weather.
Signup and view all the answers
An earthworm can ingest its own weight in soil every ______ hours.
An earthworm can ingest its own weight in soil every ______ hours.
Signup and view all the answers
When mating, two worms are held together by ______ secreted by the clitellum.
When mating, two worms are held together by ______ secreted by the clitellum.
Signup and view all the answers
Development occurs inside the ______ and young worms hatch out.
Development occurs inside the ______ and young worms hatch out.
Signup and view all the answers
Food is stored in a thin-walled ______.
Food is stored in a thin-walled ______.
Signup and view all the answers
Each somite, except the 1st three and terminal one, have a pair of ______.
Each somite, except the 1st three and terminal one, have a pair of ______.
Signup and view all the answers
A ______ funnel, the nephrostome, draws in wastes and leads through the septum.
A ______ funnel, the nephrostome, draws in wastes and leads through the septum.
Signup and view all the answers
Coelomic fluid and blood transport food, wastes, and ______ gases.
Coelomic fluid and blood transport food, wastes, and ______ gases.
Signup and view all the answers
Neurosecretory cells in brain and ganglia secrete ______.
Neurosecretory cells in brain and ganglia secrete ______.
Signup and view all the answers
Members of Class Oligochaeta ______ bright light.
Members of Class Oligochaeta ______ bright light.
Signup and view all the answers
Some annelids lack ______ vessels and coelomic sinuses serve as their only vascular system.
Some annelids lack ______ vessels and coelomic sinuses serve as their only vascular system.
Signup and view all the answers
Leeches are highly sensitive to ______ associated with the presence of prey.
Leeches are highly sensitive to ______ associated with the presence of prey.
Signup and view all the answers
Those that feed on mammals are attracted by ______.
Those that feed on mammals are attracted by ______.
Signup and view all the answers
Coelomic fluid would have acted as a ______ fluid and reduce need for flame cells everywhere.
Coelomic fluid would have acted as a ______ fluid and reduce need for flame cells everywhere.
Signup and view all the answers
The selective advantage of a segmented body for annelids appears to lie in the ______ of burrowing.
The selective advantage of a segmented body for annelids appears to lie in the ______ of burrowing.
Signup and view all the answers
Molecular analyses place sipunculids and echiurans closely related to the ______.
Molecular analyses place sipunculids and echiurans closely related to the ______.
Signup and view all the answers
