Which of these is a weakened or dead form of a pathogen that causes an immune response?

A antibody

B vaccine

C antigen

D inflammation

Which of the following is the region where the respiratory path has to cross the digestive pathway?

Choose the correct statement. A. A molecule having a covalent bond can be ionic. B. A molecule having a covalent bond is always polar. C. A molecule having a covalent bond may be polar or nonpolar. D.

What are the characteristics of a scientific theory

The government of a rural city wants to build an electrical energy plant. While brainstorming for possible resources to use, the planners made a list as shown of some requirements and aspects of the city's location that restrict what type of power

What was the primary difference between conservative and liberal opposition to the new deal

In addition to a thicker stratum corneum and the presence of a stratum lucidum, the thick skin of the palms and fingertips of the hands and of the soles of the feet have a denser array of sense receptors than thinner skin found elsewhere on the

Which of the following theories sees aging as a process whereby cells are assumed to have a limitation on the number of times they can reproduce to repair damage? a. wear-and-tear theory b. cellular clock theory c. activity theory d.

In humans, oculocutaneous (OCA) albinism is a collection of autosomal recessive disorders characterized by an absence of the pigment melanin in skin, hair, and eyes. That is, normal pigmentation (A) is dominant over albino characteristics.

How can a layer of rock containing a fossils could be present in a mountain wall that is several thousand feet above sea level

During which storage stage of the cell cycle is the dna copied