Which of the following cells form new bone in bone tissue?
A) osteoblasts B) osteocytes C) fibroblasts D) osteons
Answer: A
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RNA is believed to have evolved before DNA and proteins
Indicate whether the statement is true or false
Arabinose sugar is used by ara+ bacteria but cannot be used by ara– mutants. When both ara3 and ara5 mutants are introduced into the same recipient via a vector, and the recipients still cannot use arabinose, what can you conclude?
What will be an ideal response?
Choose the correct order of the chambers through which oxygen-poor blood flows in an amphibian heart
a. atrium ? ventricle ? sinus venosus ? conus arteriosus b. atrium ? conus arteriosus ? ventricle ? sinus venosus c. sinus venosus ? atrium ? ventricle ? conus arteriosus d. conus arteriosus ? atrium ? sinus venosus ? ventricle e. ventricle ? atrium ? conus arteriosus ? sinus venosus
An interaction that benefits both participants is called a ____
Fill in the blank with the appropriate word.