Which type of stimulus is an allergen, such as pollen?

A.

inborn stimulus

B.

external stimulus

C.

response to a stimulus

D.

internal stimulus

Choose the words to complete the paragraph below. are ecosystems that are similar, such as the desert., the number of species within an ecosystem, is a sign of its health.

In an ocean ecosystem, which is necessary to begin a food web

A particular gene can have two forms, called alleles. How is the recessive allele different from the dominant allele A. Only the dominant allele must be inherited in order to be expressed B.

Which table best shows the impacts resulting from human activity? Impact of Human Activities Human Activity Impact Forest area cleared to construct an airport Increase in oxygen level Vegetation cleared to construct an oil mine Increase in pollution

Choose an organism that you are interested in that has camouflage/coloration difference between males and females. Discuss why they have these patterns.

For any gene, when there are two alleles, and the frequency of one of the alleles is 0.5, then the frequency of the other one is:

Suppose a large number of dead fish are found floating in a lake. how would you determine whether they died from cultural eutrophication or from exposure to toxic chemicals?

Which best explains how gravity contributes to the formation of layers in protoplanets? Gravity attracts materials and causes compaction, which produces heat and leads to the melting, sinking, and rising of materials.

1. As an object moves towards another object the sound waves bunch up. True Or False 2. As an object moves toward another object the sound waves have lower frequency. True or False. 3.

Do we classify viruses as living