Which layer of the digestive tract contains blood and lymph vessels and nerve cells?
a. mucosa
b. submucosa
c. serosa
d. smooth muscle
e. endothelium
B
You might also like to view...
Under which circumstances does the zenk gene become active in zebra finches, and what is its effect?
What will be an ideal response?
A(n) ____________ occurs when a bit of material enters Earth's atmosphere and becomes incandescent due to friction with the atmosphere
Fill in the blank(s) with correct word
Match the term on the left with its definition or description on the right
A) light-dependent generation of NADPH B) electron donors such as sulfide and thiosulfate C) electron donor is water D) energy from sunlight, carbon from organic sources E) energy from carbon, carbon from sunlight F) electron donor is carbon dioxide G) energy from sunlight, carbon from CO2 1) photoreduction 2) photoheterotrophs 3) photoautotrophs 4) oxygenic phototrophs 5) anoxygenic phototrophs
In Figure 8.2, if base 4 is thymine, what is base 4'?
A) adenine B) thymine C) cytosine D) guanine E) uracil