Aparticular bird species found in north america obtains most of its food energy by catching and eating insects. a mutation arises in this bird population that increases the length of its beak. although many mutations are harmful, this particular mutation has increased the ability of the bird to catch and eat certain insects. which of these is the most likely outcome of this mutation? a)the insects that are eaten by this bird are likely to become extinct. b)sharp pointed beaks will result in the birds eating other more unusual food items. c)other bird species will be more likely to also develop pointed beaks in order to compete. d)individual birds with the mutation will be more likely to survive and reproduce than birds without the mutation.

Ameadow ecosystem includes many species of grasses and small shrubs, several herbivores, and a few carnivores. a fungus colonizes the meadow and kills most of its vegetation. what is most likely to happen to the populations of herbivores and carnivores in the ecosystem? a. the populations of herbivores and carnivores will increase because there will be less competition for chemical energy. b. the populations of herbivores and carnivores will remain stable because the fungus cannot infect these organisms. c. the populations of herbivores will decrease because of vegetation loss, but the population of carnivores will remain stable. d. the populations of herbivores and carnivores will decline because less chemical energy will be stored in the ecosystem.

Which worm has eyespots that are used to detect light? a fluke b marine worm c planarian d tapeworm

Which of the following is a limitation of a clinical trial? a.)amount of random assignments b.)hospital cost c.)number of test tubes d.)amount of peer review