#Question id: 7046
#Unit 5. Developmental Biology
A group of undifferentiated progenitor cells that form in some organisms at the site of an amputation;
#Question id: 11689
#Unit 7. System Physiology – Animal
When do progesterone levels rise to their highest point during the female hormonal cycle?
#Question id: 19282
#Unit 9. Diversity of Life Forms
#Question id: 4769
#Unit 8. Inheritance Biology
In some sheep, the presence of horns is produced by an autosomal allele that is dominant in males and recessive in females. A horned female is crossed with a hornless male. One of the resulting F1 females is crossed with a hornless male. What proportion of the male and female progeny from this cross will have horns?
#Question id: 3454
#Unit 11. Evolution and Behavior
Altruism is favoured when rb - c > 0 where c is fitness cost to altruist, b is fitness benefit to recipient; and r is genetic relatedness. It is under negative selection when