When a rabbit eats a bean plant, a portion of the available energy moves into the rabbit's body. When the rabbit is eaten by a hawk, a portion of the available energy moves into the hawk's body. Indicate the various areas that energy is used by an organism, and why only 10% of the rabbit's available energy will move to the hawk.
What will be an ideal response?
When an organism consumes energy, only 10% of the energy moves to the next trophic level. Much of the energy is unavailable to the next trophic level because it is used in the following way:
1. cellular respiration uses energy and converts it into heat that dissipates into the environment.
2. some of the available energy is released through excretion and defecation. This is unavailable to the next trophic level.
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Pheromones are
a. used in nonvocal communication. b. found only in the invertebrates. c. signals to members of other species. d. types of internal hormones that control maturation. e. involved only in learned behaviors.
The type of cell labeled as 5 in the accompanying figure is a(n):
a. amacrine cell.
b. bipolar cell.
c. ganglion cell.
d. cone.
e. horizontal cell.
Organisms today are living in the Pleistocene epoch of the Cenozoic era.
Answer the following statement true (T) or false (F)
What is the best explanation for a BbCc × bbcc cross producing offspring in a 5:5:1:1 phenotypic ratio?
A) linked genes B) polygenic inheritance C) incomplete dominance D) codominance