13. Why would a pigeon breeder select the offspring of pigeons with spotted bodies and then breed those offspring? to produce offspring with spotted Bodies

to determine if spotted bodies affect wing size

to see what new traits might appear next

to improve body coloring in future generations

thrombocytopenia, which is a deficiency in blood platelets, can cause bleeding and bruising in the dermis similar to senile purpura. other possible causes include: exposure to ultraviolet rays and aging skin are common causes of senile purpura. senile purpura may also be a sign of collagen loss in the skin and bones.

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.

yes we can.   a lady urinates from her urethra.

only about ten percent of the energy at one trophic level is passed on to organisms at the next trophic level. the remainder of the energy is used in life processes or lost as heat.