Question

for example, platelets form clots that help stop bleeding.
__________ and external factors regulate cell division.

• internal factors are often triggered by external factors.
• internal factors come from __________ the cell and include several types of molecules found in the cytoplasm.
• two of the most important internal factors are ________ (enzymes) and ________ (proteins).
• apoptosis is __________
• a ________ feature of ________ organisms
• caused by a cell’s production of self - destructive __________
• occurs in development of __________

Explanation:

1. For the first blank: "Internal" (since it's paired with "external" factors regulating cell division).
2. Second blank: "inside" (internal factors come from inside the cell).
3. Third blank: "kinases" (a type of enzyme important in cell division regulation).
4. Fourth blank: "cyclins" (a type of protein important in cell cycle regulation).
5. For apoptosis definition: "programmed cell death" (the standard definition of apoptosis).
6. Next blanks: "normal" (apoptosis is a normal process), "multicellular" (occurs in multicellular organisms), "enzymes" (self - destructive enzymes cause apoptosis), "organisms" (occurs in development of organisms, like the webbed fingers example in development).

Answer:

• The first blank: Internal
• The second blank: inside
• The third blank: kinases
• The fourth blank: cyclins
• Apoptosis is: programmed cell death
• Apoptosis is a: normal feature of multicellular organisms
• Apoptosis is caused by a cell’s production of self - destructive: enzymes
• Apoptosis occurs in development of: organisms