Phylum Ctenophora & Placozoans

Biradial

Ctenophores have what kind of symmetry

Tissues, organs

Ctenophores have what kind of grade of construction

Neither

Are ctenophores protostomes or deuterostomes

No

Do ctenophores have a mesoderm lined cavity

130

Amount of species in phylum Ctenophora

marine

Ctenophores are strictly found in what kind of environments

Comb rows

A distinct characteristics of ctenophores is the presence of 8 _____ (ctenes)

Collablast

Comb rows are adhesive _____ structures

Monomorphic

Ctenophores have what kind of alteration of generations

Diploblastic

Are ctenophores diploblastic or triploblastic

Mesenchyme

What is the middle layer of ctenophores

Gastrovascular cavity, specialized nerve net, apical organ, and cydippid larva

What are some typical physical characteristics of ctenophores

Simultaneous hermaphoditism

What is the main reproductive charcteristic of ctenophores

Fragmentation

In addition to being hermaphrodites, some ctenophores can also asexually reproduce via

Broadcast spawners

Reproductive strategy of ctenophores is best described as

Cydippid larva

Term which describes how ctenophores are all direct developing

Pelagic

Ctenophores are primarily found in what Marine regions

Collablast cells

During predation, ctenophores use ______ to stick to prey and capture them

Cambrian period

Ctenophores were extsenively found in the fossil record during the

Polyp, sessile suspension feeders

Earliest ctenophores are best described as

Asymmetric

Placozoan symmetry

Tissue

grade of construction of placozoans

Diploblastic

Placozoans are triploblastic or diploblastic

Mesechyme

What is the middle layer of placozoans

4

Amount of named species of placozoans

Marine

Placozoans are found in what kind of environments

Substrates

Placozoans are typically found in marine environments crawling over

2-3 mm

Size of placozoans

Ameboid like

Placozoan body structure can be described as

2

Placozoans have ___ cell layers separated by a gel-like mesenchyme with fibrous and ameboid cells

Dorsoventrally

Placozoan cell layers are differentiated how

Ventral cells

These cells in placozoans are larger, columnar, and secretory; uses cilia to glide over surfaces

Ventral surface

This area of a placozoan can be invaginated to form a feeding cavity

Microbes

Placozoans feed on _____ and secrete digestive enzymes into the feeding cavity to digest food