Based on phylogenetic analysis, to which of the following phyla are chordates most closely related?
a. Porifera (e.g. sponges)
b. Echinodermata (e.g. sea stars)
c. Platyhelminthes (e.g. flatworms)
d. Arthropoda (e.g. insects)
e. Mollusca (e.g. octopi)
b
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Which bone(s) include(s) a manubrium?
A) scapula B) clavicle C) sternum D) cervical vertebrae #1 and #2 E) all the vertebrae
Which of the following lists the stages of prenatal development in the correct order?
A. Embryo, zygote, cleavage, morula, trophoblast, fetus B. Zygote, morula, cleavage, embryo, trophoblast, fetus C. Cleavage, zygote, morula, trophoblast, embryo, fetus D. Zygote, cleavage, morula, trophoblast, embryo, fetus E. Zygote, embryo, morula, cleavage, trophoblast, fetus
In the evolution of mammals, which glands were modified to produce milk?
A. Ceruminous glands B. Merocrine glands C. Apocrine glands D. Sebaceous glands E. Sudoriferous glands
The thoroughfare channel ends at the
A) artery. B) arteriole. C) capillary. D) venule. E) vein.