Examlex
How many of the following statements about craniates is (are) correct?
1) Craniates are more highly cephalized than are noncraniates.
2) Craniates' genomic evolution includes duplication of clusters of genes that code for transcription factors.
3) The craniate clade is synonymous with the vertebrate clade.
4) Pharyngeal slits that play important roles in gas exchange originated in craniates.
5) The two-chambered heart originated with the early craniates.
Species
A fundamental classification in biology, denoting groups of organisms that can reproduce fertile offspring, sharing common characteristics and genetic similarity.
Homology
in biology, refers to traits or organs that have a common ancestry despite potentially having different functions, while in cultural studies it can refer to similarities in patterns or structures based on shared heritage.
Subspecies
A subdivision within a species, characterized by distinct genetic, morphological, or behavioral traits, often resulting from geographical isolation.
Genus
A rank in the biological classification system (taxonomy) that groups together species that are closely related, sharing a common ancestor.
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