Which one of the following is a trait that increases the chances of survival for an endangered species?
A) Large size
B) A food source consisting of a single species
C) Widespread distribution
D) Small number of offspring
Question 2
The Ivory-Billed Woodpecker, long thought extinct, may have been found in deep woods of Missouri. Even though a few individuals may have survived, this may not be enough to avoid extinction of this species.
What else must these few birds do to ensure the survival of the species? A) Defend a territory against other bird species and predators
B) Maintain a viable breeding colony in the face of environmental resistance factors
C) Shift to a new source of food widely available in their region
D) Migrate to a better habitat that is more protected from people
Snow Leopard cubs at the Cat Survival Trust, Welwyn, UK.
Red-Green Color Blindness Is a Sex-Linked Trait in Humans
Running time on 100-meter sprint for men and women master athletes increases with age. Source: Korho
A pedigree for an autosomal dominant trait
Skin color is a polygenic trait controlled by three or four genes, producing a wide range of phenoty
Beak size in finches during dry years increases because of strong selection