Which of the following is true in the course of the evolution of a trait in a species?
A. A population mutated in response to the need for a certain trait.
B. An organism mutated during the course of its life to become better able to survive in its environment.
C. A mutation benefited an individual and allowed it to pass more genes on to the next generation.
D. An individual organism recognized the need for longer legs and evolved them.
Ans: C. A mutation benefited an individual and allowed it to pass more genes on to the next generation.
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Skin is sometimes referred to as the largest organ of the body. Why is skin considered to be an organ and not a tissue or some other structure?
A. Skin consists of multiple cell types functioning as a single integrated unit. B. Skin consists of a single cell type. C. Skin is a vital component of multiple organ systems. D. Skin consists of multiple tissue types that cooperate to perform a specific task.
The process of producing NH4
+ from decaying organic material is called
a. nitrification. b. ammonification. c. nitrogen cycling. d. nitrogen fixation. e. nitrogen assimilation.
Contrast homologous and analogous traits, giving examples
What will be an ideal response?
After an endospore forms, the cell membrane of the original cell lyses, releasing the endospore
____________________ Indicate whether the statement is true or false.