Pulmonary veins carry
A. oxygenated blood.
B. deoxygenated blood.
C. a mixture of oxygenated and deoxygenated blood.
A. oxygenated blood.
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The accessory pigment phycoerythrin is dominant in the ________ group of algae, which mostly lack flagella, have multicellular lifestyles, and occur in marine waters
Those in particular which deposit calcium carbonate in coral reef systems are classified as ________ algae. A) chlorophyte / coralline B) chlorophyte / rhodolithic C) rhodophyte / coralline D) rhodophyte / rhodolithic
The comparison between Parazoa and Eumetazoa is best described by which of the following statements?
A. Parazoa have only one kind of cell whereas Eumetazoa have many kinds. B. The various kinds of cells of Parazoa do not form permanent associations into tissues or organs whereas Eumetazoa possess true, stable tissues. C. Parazoans are only haploid, whereas eumetazoans are diploid with haploid sex cells. D. Parazoans invert during their development whereas eumetazoans do not. E. All of the choices provided are correct.
Sea urchins living in the rocky intertidal zone use the following method to overcome wave shock:
a. creating burrows in which they live. b. having a low profile. c. using spines to dissipate the energy of the wave. d. all of the above
In which structure would you find oxygenated blood?
a. right atrium b. right ventricle c. pulmonary veins d. pulmonary arteries e. superior and inferior vena cava