Tracheids and vessels together make up

A. xylem.

B. phloem.

C. chloroplasts.

D. a plant cell.

Compare and contrast the infection of a bacterial cell by a lytic bacteriophage with the infection of an animal cell by a retrovirus.

Which type of bacteria can be found in pairs chains squares of four cubes of eight or grape like clusters

In a Punnet square a recessive allele is recorded as a upper case letter. lower case letter. number. symbol.

All mutations may not be deleterious. few beneficial mutations will provide a basis for possible differential propagation of the variation, and so of the evolutionary process. b.

Which is a difference between animal populations in primary succession and secondary succession? A. Animals can be present during the start of secondary succession, but they are never present during the start of primary succession. B.

Freud believe that certain troubling symptoms could be traced to painful unconscious memories. This led him to suspect that these symptoms resulted from

Reducing the volume of a gasits pressure if the temperature of the gas and the number of particles are constant.

Salt deposits form on a car in the winter. Over time, the salt covers more of the car. Is the salt alive? a. Yes, salt deposits are alive because they maintain their structure. b. No, salt deposits are not alive because they do not reproduce. c.

Belinda recently completed a treatment program for breast cancer. For the last year, she took a drug treatment that worked to interfere with rapid cell division; what type of cancer treatment did Belinda undergo?

What do scientists call the theory that the universe will shrink in the future?