Starting from the root of a phylogenetic tree, any node that is shown farther from the root than other nodes, means
A. the two species (or groups of species represented) at the farthest node diverged by sympatric speciation.
B. that only those species at the farthest node, from the root, are in a clade.
C. convergent evolution has selected for the species (or groups of species represented) to be similar.
D. the species (or groups represented) diverged most recently from a common ancestor.
E. the species (or groups of species represented) are in the outgroup.
D. the species (or groups represented) diverged most recently from a common ancestor.
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Of which materiais is cartilage composed?
A. glycoproteins and calcium phosphate B. glycoproteins and collagen fibers C. collagen fibers and osteocytes D. osteocytes and glycoproteins E. osteocytes and calcium phosphate
The study of how large-scale ecological factors influence local populations and communities is specifically defined as
conservation biology.
a. True b. False
Conjugation, transformation, and transduction are all ways that bacteria
A) reduce their DNA content. B) increase the amount of RNA in the cytoplasm. C) increase their genetic diversity. D) alter their oxygen requirements.
Bulk flow in the phloem tissue is mostly downward whereas bulk flow in xylem is mostly
A. upward. B. sideways. C. also downward. D. very little bulk flow occurs in xylem. E. flow of sugars.