If a DNA molecule is compared to a spiral staircase, what parts make up the steps?

sugar and nitrogen base

pairs of nitrogen bases

sugar and phosphate

pairs of sugars

Which of the following is true of transcription? A. In Eukaryotic, transcription takes place in the cytoplasm B. RNA polymerse recognizes and binds to specific regions of the DNA called introns C.

Illuminated objects are those that A. reflect light. B. absorb light. C. produce light.

What events caused the formation of most islands in the South Pacific?

Photoreceptors are nerve cells most related to a human sense of

What is speciation in general? briefly describe the difference between allopatric speciation and sympatric speciation. be sure to include under what sort of conditions each type might occur?

Some types of cells require synthesis of large quantities of protein. These cells contain multiple nuclei to speed the synthesis process. Which of the following would most benefit from having multiple nuclei? A. skeletal muscle cells B.

Develop 3 questions about how genetic disorders are passed from one generation to the next, using the terms: DNA, chromosomes, and heredity.

When someone is angry, their respiration, heart rate, and sweating increase. The same responses are also seen when someone is afraid. Walter Cannon suggested that such findings brought which theory into question?

A nurse is performing cardiac compression on an adult client. how far must the nurse depress the lower sternum to maintain circulation until a defibrillator is available?

One lithospheric plate can slide below another at __. a. divergent boundary b. convergent plate boundary c. over-thrust plate boundary d. a fault line