Over the past three decades, extraordinary advances have been made in zoological classification thanks to the incorporation of new methods and technologies, including evolutionary developmental biology (evo-devo), molecular phylogeny, and comparative genomics. Our understanding of the phylogenic position of...
In1886 and 1887, Kowalevsky reported his discovery of the notochord in ascidian larvae [9] and in lancelet adults [10]. His reports impressed zoologists with the affinity of these two invertebrates with vertebrates, as all three groups have a notochord. Following further discussion, in 1877, ...
Match the Baby Animal to Its Mama Quiz Form and function. The body of the arrowworm is covered by acuticleof cells. The head has hooks (curved, grasping spines) covered by a hood or thin fold of skin, which retracts when the arrowworm is catching prey. Head muscles control the movement...