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- Biology 24. 2 Flashcards | Quizlet
The first anatomical feature that signaled a major change in the evolution of animal body plans was the development of You observe the formation of an embryo of an unknown species under a microscope The first body opening develops into a mouth in the gastrula What does this signify? Don't know? C
- Which was the first anatomical feature that marked a major change in . . .
The development of a head was the first anatomical feature that marked a major change in the body plan of evolving animals The evolution of a head allowed for the specialization of sensory organs, such as eyes and ears, and the concentration of nervous tissue
- multiple cholce question the first anatomical feature to indicate a . . .
The development of a body cavity was a significant evolutionary step that indicated a major change in body plan This event, known as the Cambrian explosion, occurred approximately 541 million years ago and marked a period when most of the major groups of animals first appeared in the fossil record
- From Lizard to Snake; Behind the Evolution of an Extreme Body Plan
The snake-like body plan is thus characterized by two landmark changes; an extension of the primary body axis by the addition of more vertebrae and a deregionalization of the skeleton involving a reduction of the vertebral specialization along the antero-posterior axis (Fig 1)
- The Evolution of Body Plans: A TALE of two proteins
During development, this axis is divided into a series of segments, and the Hox genes are well-known for determining what structure form in each segment — that is, they control where the head,
- bio chapter 24. 2 Flashcards | Quizlet
Which was the first anatomical feature that marked a major change in the body plan of evolving animals? A Bilateral symmetry B Body cavity C Segmentation D True tissues D
- 4. 2: Evolution of the Animal Body Plan - Biology LibreTexts
Animals are primarily classified according to morphological and developmental characteristics, such as a body plan One of the most prominent features of the body plan of true animals is that they are morphologically symmetrical This means that their distribution of body parts is balanced along an axis
- The Body Plan Concept and Its Centrality in Evo-Devo
A body plan is a suite of characters shared by a group of phylogenetically related animals at some point during their development The concept of bauplane, or body plans, has played and continues to play a central role in the study of evolutionary developmental biology (evo-devo)
- First Genetic Evidence Uncovered of How Major Changes in Body Shapes . . .
Biologists at the University of California, San Diego have uncovered the first genetic evidence that explains how large-scale alterations to body plans were accomplished during the early evolution of animals
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