Articles related to "Notching"
Blue Grosbeak
Male Blue Grosbeaks get their striking spring plumage from feather wear. While Blue Grosbeaks spend their winter in the South, the brown feather tips rub off leaving the crystal blue plumage when arriving on their breeding grounds.
blue
• grosbeak
• large beak
• wing stripes
• notched tail
Cancer Stem Cells
Cancer stem cells constitute only a very small portion of tumors yet play a key role in the proliferation of cancer. Cancer stem cells may be inherently resistant to chemotherapeutic drugs. Cancers that result from chronic tissue injury may be due to excessive activation of stem cells.
stem cells
• cancer stem cells
• apoptosis
• wnt
• shh