Molecular techniques led to the reinterpretation of morphologically based phylogeny such that
A. Ecdysozoa and Lophotrochozoa were designated as clades.
B. Bilateria was designated as a monophyletic group.
C. annelids and arthropods were designated as closely related.
D. rotifers and nematodes were designated as closely related.
E. echinoderms and chordates were placed in entirely different clades.
A. Ecdysozoa and Lophotrochozoa were designated as clades.
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Which of the following is not a function of the endocrine system?
A. All the answer options are functions of the endocrine system. B. The endocrine system helps an animal respond to the environment. C. The endocrine system helps synchronize and coordinate body processes. D. The endocrine system regulates growth. E. The endocrine system regulates development.
Which respiratory surface lacks physical protection from the external environment?
a. tracheal system tubes b. human lungs c. external gills d. internal gills e. bird lungs
The filtering of lymph and the initiation of immune responses to foreign material are functions of what organ(s)?
A. Lymph Nodes B. Spleen C. Thymus D. Tonsils
the phenotypic ratio for a dihybrid cross is
What will be an ideal response?