Which of the following is the most anterior structure in a cross-section at the lumbar level?
A) iliocostalis muscle
B) distal end of the iliotibial tract
C) rectus abdominis muscles
D) sacroiliac joint
E) vertebrae
C) rectus abdominis muscles
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The lungs are special in that they receive some of their oxygen via diffusion directly from the atmospheric air through the ________ of the lungs.
Fill in the blank(s) with the appropriate word(s).
People who are ________ get sick very easily and do not recover easily.
A. anaphylactic B. immune C. autoimmune D. immunodeficient
As each codon arrives at the active site of a ribosome, it attracts another molecule containing the anticodon. This molecule is called
A) DNA. B) mRNA. C) rRNA. D) tRNA. E) RER.
If a species of animal evolves over generations to grow a large fan-blade like growth on its back to catch the wind and cool its body, this would be an example of responding to ________.
A. adaptation B. selection pressure C. climate change D. natural selection