Assuming resting conditions at sea level, what is the partial pressure of oxygen in alveoli?
A)46mmHg
B)100mmHg
C) 160 mm Hg
D) 80 mm Hg
E) 40 mm Hg
Ans: E) 40 mm Hg
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Which one of the following terms applies to the phylum Cnidaria?
A. radial symmetry B. pseudocoelomate C. Parazoa D. triploblastic E. protostome
Stem cell lines are developed from ________
A) multipotent cells B) inner cell mass cells from a blastocyst C) cells collected from umbilical cords D) cells collected from amniotic fluid
Photosynthetic organisms are ________
A) producers that make all of their organic matter from organic molecules that they take in B) consumers that obtain organic molecules from other living organisms C) producers that make all their own organic matter from inorganic molecules D) decomposers that obtain nutrients from the soil
A zygote with animal and vegetal poles demonstrates what characteristic of some animal zygotes?
What will be an ideal response?