Riley is 3 years older than his sister. The sum of their ages if s represents Riley's sister's age is shown as

A. 3s

B. b s + 3

C. 2 (s + 3)

D. 2s + 3

What might be the effect on portland's climate if the cascade range was to the west rather than to the east of portland? Be sure to consider the prevailing pattern of wind in the united states and the concept of a rain shadow in your answer.

Human activity can destroy coral reefs write an essay of how

Many scientists believe that the surrender period of global warming is related to increased levels of? a. radon being released from the earths surface b. nitrogen in the earths atmosphere c. carbon dioxide in the earths atmosphere d.

Which of the following comparisons of the autonomic nervous system (ANS) and the somatic nervous system (SNS) is not true? a. the SNS carries information from the special senses b. the ANS has sensory receptors called interoceptors c.

Before using any chemical in the lab, why should one first read the Material Safety Data Sheet (MSDS) ?

The main function of the inflammatory response is 1. to initiate the production of antibodies. 2. remove contaminating microorganisms 3. initiate repair of damaged tissues. 4. initiate T-cell-mediated immune responses.

The functions of the nasal conchae are to enhance the air turbulence in the cavity and to increase the mucosal surface area exposed to the air. T/F

Which of these groups of animals are endargered a. mice b. killer whales c. dinosaurs d. sea turtles

Levels of organization of the biosphere

From where dothe kenetic tiles collect energy