What type of stimulus is an allergen such as pollen?

response to a stimulus

external stimulus

internal stimulus

inborn stimulus

How did the formation of the ozone layer contribute to existence of life on earth

This study is replicated in the Appalachian Mountains with similar results. Which of the following is true? The number of days with poor flower availability increased. The number of days with poor flower availability decreased.

Brepresents the dominant allele for brown fur, and brepresents the allele for white fur. What are the possible phenotypes for offspring of rabbits with the genotypes BB and bb? O A. 75% will have brown fur, and 25% will have white fur. O B.

Why is an ecological pyramid smaller at the top than the bottom

What do all rodents have in common

Salvador would like to take a paternity test to determine if he is Pilar's father. He asks Pilar's mother, Antonia, to provide DNA samples for both her and Pilar. Which technique will most likely be used to compare the three DNA samples?

What is not a a form of passive transport

12. When a plant grows on the shade

What is the life expectancy of stage 4 sarcoidosis?

What does action force mean