In this phylogeny, the P species are from the Pacific side and the C species are from the Caribbean side of the Isthmus of Panama. What is the most likely cause of speciation?
a. sympatric speciation
b. parapatric speciation
c. allopatric speciation via dispersal across the Isthmus of Panama
d. allopatric speciation via isolation when the Isthmus of Panama closed
D
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Which layer of the skin is composed of stratified squamous epithelium cells? a. Epidermis b. All of these choices have stratified squamous epithelium
c. Hypodermis d. Dermis e. None of these choices have stratified squamous epithelium.
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Indicate whether the statement is true or false
The large seaweed known as kelp is classified as a member of the
A. Chlorophyta. B. Phaeophyta. C. Chrysophyta. D. Rhodophyta. E. Deuteromycete.