Some conditions like progeria do not run in families despite being autosomal dominant. How is that
possible? What will be an ideal response?
If the autosomal dominant trait is either lethal before the individual can successfully reproduce or has
enough disturbance on phenotype to prohibit reproduction, the afflicted individual will not reproduce
and the trait cannot be passed on.
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What role does the plant cell wall compound lignin play in the adaptation of plants to a land environment?
What will be an ideal response?
The point at which a nerve impulse is initiated is the ____
a. initiation threshold b. initiation potential c. action potential d. graded potential e. threshold potential
Root hair development is under the control of two genes that code for transcription factors
____________________
What were Darwin's two fundamental insights about the process of evolution?
a. The environment selects on variation in the traits of individual organisms; and organisms are in a constant struggle for existence. b. The environment selects on variation in the traits of individual organisms; and all species have descended from one or a few common ancestors. c. All species have descended from one or a few common ancestors; and over time populations, not individuals, evolve. d. Over time populations, not individuals, evolve; and evolutionary change is connected to envi-ronmental fit.