X-rays can be used to view bones because
A. x-rays can not pass through bone.
B. x-rays pass through bone.
C. x-rays react with bone.
D. bones are less dense than soft tissue.
A
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Cones
a. are most abundant in the periphery of the retina. b. are more numerous than rods. c. have high sensitivity to light. d. are responsible for color vision. e. more than one of these.
Frogs have only one ventricle. What's an apparent shortcoming of frog hearts?
a. can't generate enough blood pressure with only one ventricle b. O2?rich and O2?poor blood from R and L atria will mix in single ventricle c. problem selectively directing O2?rich blood to body or O2? poor blood to lungs d. b and c
The simultaneous process of adding new bone and removing previously formed bone is called ________.
A) internal callus formation B) endochondral ossification C) osteomalacia D) bone remodeling E) intramembranous ossification
A fertilized egg is called a(n) ________.
A. embryo B. zygote C. blastocyst D. morula