Answer:
Condensation happens when molecules in a gas cool down as the molecules lose heat, they lose energy and slow down. They move closer to other gas molecules and finally the molecules collect together to form a liquid.
Explanation:
As the wolf population increases, the need for food will increase, causing the wolves to hunt more hares, making the hare population decrease.
Yes. Oxygen crash led to Cambrian mass extinction
Answer:
Changes in gene expression
Explanation:
This phenomenon is the result of changes in gene expression. That means, how the information in the DNA is used by the cell. The genes that are active in the cells of the brain will be very different from the genes that are active in the cells of the bone marrow.
These patterns of gene expression are different for each cell, and dictate the identity of that cell. Gene expression patterns are controlled by a variety of factors in the cell that allow tissue-specific expression, such a transcription factors.
This can also be facilitated by another layer of regulation called epigenetics, which literally means "on top of" genetics, and refers to modifications of DNA (and the proteins around it), that can reflect and influence the activity of the genes within.
