The cell is the basic unit of life. All cellular structures exhibit special functions. Match the structure with its function. What is the function of "E"?
A. Directs cellular activities, contains DNA
B. Site of protein synthesis
C. Outer boundary of cell, controls entry and exit of substances
D. Major site of ATP synthesis when oxygen is available
E. Contains digestive enzymes
Answer: E
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The sinusoids of the liver are lined by phagocytic reticuloendothelial cells, also called ___________ cells
Fill in the blank with correct word.
Which of the following is true of megakaryocytes?
A. They give rise to macrophages. B. They give rise to platelets. C. They secrete histamine. D. They aggregate to plug tears in blood vessels. E. They are small (no larger than 2 to 4 mm in diameter).
List and briefly explain the function of each portion of the male reproductive tract, in order, from where the sperm cells are first produced to the point where they leave the male's body.
What will be an ideal response?
The fetal stage of development begins at the end of the eighth week
Indicate whether the statement is true or false