Intramembranous ossification step 3
What will be an ideal response?
Woven bone is formed when osteoid is laid down around blood vessels, resulting in trabeculae (outer layer of woven bone forms periosteum)
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what is the etiology of tetanus?
What will be an ideal response?
Xylem tissue may contain each of these cell types, except which?
A. rays B. fibers C. tracheids D. sieve cells E. vessel members
Long-lasting pesticides such as DDT
a. are target-specific. b. are the most effective control over pests. c. build up in concentration as they pass up a food chain. d. break down after the organism that receives the pesticide dies. e. do all of these.
Which of the following is not an effect of acid deposition?
A. destruction of aquatic food webs B. decrease in the number of species that can survive in the lake ecosystem C. thinning of high-elevation forests D. increase of pH in lakes E. deformities in fish and other aquatic organisms