Like echinoderms chordates are deuterostomes. What is one characteristic that separates deuterostomes from all other animals? The most ancient branch point in animal phylogeny is that between having. What is the most ancient branch point in animal phylogeny? d.) Radial symmetry occurs most frequently in animals that catch their prey by rapid swimming. … Bilaterally symmetric animals can be streamlined for swimming but radially symmetric animals cannot. Radial symmetry is more advantageous for active swimming than is bilateral symmetry. Is radial or bilateral symmetry better for swimming? See also where can brackish water be found What are the synapomorphies that define mammals?Īn example of an apomorphy or synapomorphy is the presence of derived traits such as an erect gait fur and mammary glands in mammals but not in other vertebrate animals like amphibians and reptiles which have retained their ancestral traits of a sprawling gait and a lack of fur. What is most consistent with the hypothesis that the Cambrian explosion was caused by the rise of predator-prey relationships? What synapomorphies do mammals share?įor example the presence of mammary glands is a synapomorphy for mammals in relation to tetrapods but is a symplesiomorphy for mammals in relation to one another-rodents and primates for example. ![]() What distinguishes animal heterotrophy from fungal heterotrophy is that only animals derive their nutrition by… ingesting it. The unique feature which all deuterostomes have in common is that the blastopore formed during gastrulation becomes the anus which would be consistent… What distinguishes animal from fungal Heterotrophy is that only animals?īoth animals and fungi are heterotrophic.
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