You're studying two species of frog. How would you know if gradualism or punctuated equilibrium played a role in the formation of the two species from their common ancestor?
A) The species would have more differences if speciation occurred gradually.
B) The species would have more differences if speciation occurred suddenly.
C) The species would be the same regardless of how the speciation occurred.
D) The degree of difference depends less on the mechanism of speciation than on the time that's passed since speciation occurred.
D
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The "lub" heart sound represents ____
a. a heart murmur b. closure of the atrioventricular valves c. closure of the semilunar valves
d. hypertension e. movement of actual heart muscle
Of the following, which group exhibits a diverse morphology, forming unicells, filaments, and sheets?
a. green algae b. brown algae c. euglenoids d. dinoflagellates e. diatoms
From where does the O2 released during the light reactions of photosynthesis come?
A) C6H12O6 B) H2O C) CO2 D) RuBP E) ATP
List and describe the criteria that are used to measure quality of life.
What will be an ideal response?