Plants that are adapted to growing in flooded soils that are depleted of oxygen have:a
aerial roots.
b. contractile roots.
c. pneumatophores.
d. prop roots.
e. buttress roots
C
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Why might we want to introduce new genes into plants?
a. to improve their nutritional value to primary consumers b. to produce a genetically modified plant c. to create plants that can produce pharmaceutical drugs. d. to produce plants resistant to certain kinds of damage e. all of these
The effect of smoking on the respiratory tract includes
a. reduced production of mucus. b. increased development of cells. c. immobilization of ciliated cells. d. destruction of white blood cells that patrol the respiratory tract. e. both immobilization of ciliated cells and destruction of white blood cells that patrol the respiratory tract.
Cancer is associated with problems related to the regulation of ________
A) mitosis B) meiosis I C) meiosis II D) cytokinesis
Which statement is not a reasonable fear of genetically modified foods?
a. The loss of genetic diversity among crop plants is risky. b. Genetically modified foods are unnatural. c. Eating genetically modified foods could be dangerous. d. Organisms that we want to kill may become invincible. e. Organisms, such as the monarch butterfly, that we don't want to kill may be killed inadvertently.