6 Test Bank CHAPTER 33 STRUCTURAL SUPPORT AND MOVEMENT Multiple-
Choice Questions 1. Organisms with external skeletons are exemplified by a.
Animals can have internal or external skeletons - while some do not have a
skeleton at all. Insects have an external skeleton made of chitin. Sharks have an
External skeletons and coeloms appeared during the Cambrian-Ordovician time.
... Deuterostomes (as exemplified by the echinoderms and chordates) develop ...
if embryonic cells are separated, each one develops into a complete organism.
May 30, 2000 ... ... external skeletons (exoskeletons) that enclose their soft bodies. Single-celled
organisms called radiolarians and diatoms make these protective ... Another
common patterning method in nature is exemplified by the stripes or ...
... do not have backbones and consequently all those organisms which move,
ingest food, ... The vast majority have an external shell made of secreted calcium
carbonate .... This is exemplified by the freshwater limpets of our rivers and
streams. .... The external skeleton (exoskeleton) is composed of a material called
Feb 17, 2011 ... The biological importance of this regulation is best exemplified by ... first
evidence that the skeleton is an endocrine regulator of fertility. ..... is a more
important regulator of whole-organism physiology than was ..... External link.
Arthropods: Invertebrate organisms of the animal kingdom that include insects,
spiders, and Crustacea; organisms characterized by an external skeleton and
legs with ..... Genetic dwarfs are best exemplified in peaches and nectarines.
The PTHrP signaling pathway was critical for the evolution of the skeleton, ... By
viewing evolution from its inception in unicellular organisms, driven by ....
exemplified by the comment by SJ Gould that internal selection is tantamount to
cancer . ..... Such external environmental constraints to the transition from
3.6 Organisms respond to changes in their internal and external environments ...
The protective effect of a simple reflex, exemplified by a three-neurone simple
reflex. ... Muscles act in antagonistic pairs against an incompressible skeleton.