Which structure normally stimulates an allergic response?

(1) white blood cells

(2) antigen

(3) antibodies

(4) white blood cells, antigen and antibodies

In 1958 a union was formed in europe that eliminate all trade barriers among member nations, set up a common tariff with non-members, and allowed in the free movement of goods, labor, and capital. What was the name of this union?

Why is it dangerous to leave non-fertilized eggs with fertilized eggs during incubation?

What is the functional group in Sucrose?

Use fiber in a sentence

Microevolution is the observable change in the allele frequencies of a species. true or false

Which of the following statements correctly relates mutations and survival rates of animals? Mutations always improve the chances of survival for an animal. Mutations sometimes improve the chances of survival for an animal.

Which derived character is shared by fish and frogs but not lancelets? A. hair B. four-legged locomotion C. amniotic eggs D. vertebral column

In what regions of the world is habitat loss most rapid?

Describe the process of speciation in relation to change in gene frequency, change in environment, natural selection, and genetic drift.

Which substance acts as a buffer in natural water? A) minerals and salt B) distilled water C) sulfuric acid D) a pH indicator