Different types of cells, such as heart and lung cells, are created by the expression of ---
As unspecialized cells mature, what controls their development into specific cell types?
Environmental factors typically activate genes in a cell by causing the cell to —
As a fertilized egg divides, the cells differentiate because they --
Below are two cell types. One is a neuron (nerve cell) and the other is a hepatocyte (liver cell).
Which of the following statements is correct AND explain why the cells have different functions.
Statement 1: Each of these cells carries different DNA.
Statement 2: Each of these cells carries the same DNA.
A developmental biologist is researching how cells in a frog embryo differentiate into various tissues. She discovers that certain cells only start developing into nerve cells when exposed to a specific hormone produced by the embryo.
What does this observation suggest about the role of hormones in cell differentiation?
Researchers are studying the effect of diet on cell differentiation in fruit flies. They discover that when larvae are given a diet enriched with certain nutrients, they develop into queens, whereas those on a standard diet become worker bees.
What can be inferred about the role of diet in cell differentiation?
Scientists conduct an experiment on fish embryos, exposing one group to low levels of a toxin and another group to normal, clean water. The embryos exposed to the toxin show abnormal cell differentiation, leading to defective organs.
What does this suggest about the influence of toxins on cell differentiation?