Which feature is found in both nonvascular and vascular plants?
a. xylem
b. cuticle
c. apical meristem
d. lignin
Ans: b. cuticle
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In individuals with cystic fibrosis:a
the mucus enhances the action of the cilia that line the bronchi. b. the mucus prevents the growth of dangerous bacteria in the respiratory system. c. the mucus in the respiratory system is thinner than in unaffected individuals. d. abnormal mucous secretions occur throughout the body systems. e. abnormal mucous secretions inhibit infections by bacteria.
What are the major differences between LTR and non-LTR retrotransposons?
What will be an ideal response?
The ________ valve separates the right atrium and ventricle.
a. atrioventricular b. semilunar c. pulmonary d. lunar e. aortic
It is thought that all eukaryotes have about 300 genes in common. Would you predict that these genes would be used at different times during the life cycle of multicellular animals? Explain your answer
What will be an ideal response?