In which of the following does the environment play a causal role?
a. Marfan syndrome
b. cystic fibrosis
c. dog coat color
d. sickle-cell anemia
e. depression and schizophrenia
ANSWER: e
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The wide variety of finches Darwin observed in the Galàpagos was thought provoking to him because they appeared to have descended from __________ population. Today we regard this as an example of ___________
A. the same; adaptive radiation B. more than one; convergent evolution C. the same; convergent evolution D. more than one; adaptive radiation
Cells at shoot tips maintain their totipotency due to the expression of:
A. meristem identity genes. B. growth regulation genes. C. lateral growth genes. D. S-regulation genes. E. nodal expression genes.
________ is a measure of the randomness or disorder of a system.
A. Free energy B. Enthalpy C. Entropy D. Synergy
Which of the following features would disqualify a plant from being classified as a bryophyte?
A. dispersal of gametes by wind B. nonvascular tissues C. presence of flagellated sperm D. ability to reproduce sexually and asexually E. gametophyte is the dominant stage of the life cycle