A) Which type of cell has a life span of four days? (1 point)
skin
heart
brain
colon
skin
A) Why do heart cells have different characteristics than skin cells? (1 point)
Heart cells express different genes than skin cells.
Heart cells reproduce by cell differentiation.
Heart cells have different DNA than skin cells.
Heart cells reproduce by mitosis.
Heart cells express different genes than skin cells.
A) Which change would likely result from proliferation? (1 point)
an organism's cells combine once adding mass to the organism
an organism's cells multiply many times adding mass to the organism
an organism's cells combine many times adding mass to the organism
an organism's cells multiply once adding mass to the organism
an organism's cells multiply many times adding mass to the organism
A) Which of the following is true about cell differentiation when the body tries to heal from an
injury? (1 point)
Damaged cells proliferate until the wound heals.
Platelets express different sections of RNA in order to create skin cells.
Cells grow during the synthesis phase of the cell cycle in preparation for senescence.
Stem cells differentiate to provide specialized cells that replace damaged tissue.
Stem cells differentiate to provide specialized cells that replace damaged tissue.
A) Are your heart cells the same as your brain cells? Why or why not? (1 point)
No, different sections of the cells' DNA are "tuned on" causing heart cells to have different
characteristics from brain cells.
Yes, during mitosis, the resulting daughter cells are identical which means that all cells in the
body are the same.
Yes, the heart cell and the brain cell have the same function, therefore they are identical.
No, heart cells are stem cells that replicate and create brain cells, therefore they are two different
types of cells.
No, different sections of the cells' DNA are "tuned on" causing heart cells to have different characteristics from brain cells.
Which type of cell has a life span of four days?(1 point)
Responses
skin
skin
heart
heart
colon
colon
brain