place the phases of the cell cycle in the correct order starting with G1.
• M
• S
• G1
• G2
1) G1
2) S
3) G2
4) M
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The esophagus is a tube that carries food from the mouth to the stomach. It does not secrete any enzymes or absorb any nutrients, but it does need to stand up to significant friction and stress. The type of epithelium most likely lining the esophagus would be:
A) stratified squamous epithelium. B) cuboidal epithelium. C) simple squamous epithelium. D) transitional epithelium. E) simple columnar epithelium.
Describe how lateral inhibition allows for localization of a stimulus.
What will be an ideal response?
Which of the following is associated with osteoclast reabsorption of bone?
A. Calcium ions are actively transported from blood to bone matrix. B. The protein components of bone matrix are synthesized. C. Osteoblasts form collagen and proteoglycans. D. Blood calcium is decreased. E. Hydrogen ions form an acid environment in bone matrix.
Tickle is to ________ as ache is to ________
A) pressure; heat B) baroreceptors; chemoreceptors C) touch; pain D) stretch; temperature E) thermoreceptors; nociceptors