Web Results

Neoteny - Wikipedia


The retention by adults of traits previously seen only in the young is important in developmental biology, and consequently in evolution. It occurs in two ways. In neoteny (/niːˈɒtᵻ...

Echinoderms and Invertebrate Chordates


Chapter 29: Echinoderms and Invertebrate Chordates. Echinoderms ... 3, An animal that retains its chordate features throughout life is the _____. Need a Hint ?

Animal Kingdom Test Review Flashcards


Apr 19, 2012 ... Because sponges are sessile, they get their food through ______. ... An animal that retains its chordate features throughout life is the _____.



... derived characteristics of chordates distinguish them from their ancestors: ... these characteristics need not be retained throughout life for an animal to be ...

Characteristics of Chordata - Boundless


Animals in the phylum Chordata share four key features: a notochord, a dorsal ... The notochord provides skeletal support, gives the phylum its name, and develops ... acts as the primary axial support of the body throughout the animal's lifetime. ... The Cambrian Explosion of Animal Life, and Characteristics of Vertebrates.

Chordata facts, information, pictures | Encyclopedia.com articles ...


The three features unique to chordates and found in all of them at least during early ... into the head and keeps the animal from telescoping when its muscles contract. .... Throughout life, hagfish and lamprey retain the notochord, a supporting ...

Chapter Synopsis - McGraw Hill Higher Education


... 36: Chemical Coordination, Chapter 37: Immunity, Chapter 38: Animal Behavior ... For simplicity, however, this text retains the traditional Linnaean classification, but ... These characteristics are found in all chordates at some stage of their life ... In the protochordates and jawless vertebrates, it is persistent throughout life...

chordate | animal phylum | Britannica.com


Mar 30, 2012 ... Vertebrates retain traces of a feeding apparatus like that of tunicates and cephalochordates. ... The chordate life cycle begins with fertilization (the union of sperm and egg). In its primitive form, fertilization occurs externally, in the water. .... possess gill slits and other features not found in other animal phyl...

Notochord - New World Encyclopedia


Nov 21, 2008 ... The higher chordates were built on the foundation of this model ... defining characteristics of the phylum Chordata, along with the presence of a hollow ... Lancelets (suphylum Cephalochordata) retain the notochord throughout their lives ... the hagfish and lampreys, the notochord remains throughout life and ...

Biology of chordates video guide.


characteristics can only be seen during a relatively small portion of the life cycle ... embryonic or larval stage, when the animal is difficult to observe). ... Then they travel along the odor gradient until they find their food, whereupon .... 5) Which class of chordates retains all of the four basic chordate characteristics in the ad...