A signal is translated to cause a muscle to contract. Of what is this an example?

A, intracellular communication

B, enzyme-linked receptor

C, intercellular communication

D, ion channel-linked receptor

Which factor is most likely to contribute to the evolution of a species? A. a stable environment in which members of the species live B. genetic variation within the species C. the inability of species members to adapt D.

Which body of water does not directly contribute water vapor into the atmosphere

Which of the following could be a method used to estimate the age of an ancient rock? To find out its mineral composition To find the age of the fossils trapped in it To calculate the amount of C-14 atoms left in it To calculate the number of

Which statement best describes a natural resource? A. a machine that generates electricity B. any material supplied by the environment that humans use C. paper money D. physical features of the land, such as mountains and rivers

1. the idea that the sporophyte generation and the gametophyte generation follow one another in alternating fashion perennial 2.

What were characteristics of the Roman empire at its height there are more than 1 answer

What is the hawaiian islands formed by one or several of these which bring new rock to the surface of earth?

Adolescents (ages 12-18) experiment with and develop a sense of who they are and what roles they want to play. What is the primary developmental task of this stage?

When did most marine life go extinct?

Phosphorescence is a phenomenon associated with which algal division