According to the endosymbiotic theory, ___________ evolved from free-living prokaryotic cells. 

A. nucleoli
B. mitochondria
C. ribosomes
D. Golgi bodies


B. mitochondria

Biology & Microbiology

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Cells directly beneath the shoot apical meristem begin to elongate and form the stem. Which of the following events or structures contribute to the elongation of these cells? Select all correct choices

A. the formation of a large vacuole in these cells B. the presence of cellulose microfibrils in these cells C. the presence of meristem identity genes in these cells D. the loss of cytoplasm from these cells

Biology & Microbiology

Which is NOT an example of a stimulus sensed by an interoceptor?  

A.  temperature B.  vibration C.  pain D.  magnetism E.  touch

Biology & Microbiology

Explain how proprioceptors work

What will be an ideal response?

Biology & Microbiology

How many carbon sugars are there in a pentose sugar?

a. two b. three c. five d. six e. eight

Biology & Microbiology