The lampreys are unusual vertebrates in that they have no
a. eyes.
b. jaws.
c. gill slits.
d. mouth.
b
You might also like to view...
Which of the following antigen types found in gram-negative enterics is mismatched?
A. K antigen - capsule B. O antigen - cell wall C. H antigen - flagellar D. All of the choices are correct matches.
In the structure of DNA, the total amount of ____________________ and ____________________
equals the total amount of ____________________ and ____________________. Fill in the blank(s) with the appropriate word(s).
Which of these would be best able to reproduce during a period with little to no rainfall?
a. No plants can reproduce except during rainy weather. b. ferns c. gymnosperms d. bryophytes e. lycophytes
A student poses the question: How does the presence of dissolved salt affect the freezing point of water? To answer this question, the student set up two conditions. In the first condition, the student added salt to water in a container and referred to this condition as the variable. In the second condition, the student did not add any salt to water in a second container and referred to this condition as the control. The student took both containers and attempted to freeze the water at various temperatures to assess the freezing point. Would this be a valid experiment?
A. Yes, because there is more than one variable. B. No, because there is only one variable and a control C. Yes, because there is one variable and a control D. No, because there is not more than one variable