Which statement illustrates Lamarck's theory on the mechanism of evolution?
A) A man who routinely shaves the hair off his head will have sons who become bald.
B) Fish with coloration that matches the river bottom they inhabit will survive to reproduce.
C) Plants that can survive in less light will become the dominant species in shaded areas.
D) Giraffes with longer necks survived and reproduced faster because they could reach a better food source.
E) Birds with bright colors will attract more mates and pass on the colorful plumage.
A
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Electroreceptors ____
a. are only used by fishes for navigational purposes b. can be used for communication between primates c. are only able to receive, not produce, electrical signals d. can be used to generate electrical fields in some invertebrates having special electric organs e. are usually used in communication, navigation, and hunting in the organisms that possess them
Which organism can have more then one nucleus per cell?
A. Animals B. fungi C. protozoa D. B & C only E. A, B, & C
The conversion of solar energy to chemical energy is known as ______.
A. metabolism B. photosynthesis C. chemosynthesis. D. catabolism E. anabolism
A friend who is not a biologist tells you that she grows irises from iris roots. You explain to her that the "root" she is planting is not a root, but instead is called a rhizome. "Why?" she asked. You explain:
A. "A root stores nutrients, but rhizomes are underground stems that do not store nutrients." B. "A rhizome is a modified root that is able to grow leaves." C. "A rhizome has nodes and internodes and is really a modified stem that can exist underground." D. "A rhizome, although a modified stem, acts as a root does. In other words a rhizome is a stem-root combination." E. "A root grows vertically, not horizontally."