Why is speciation via changes in ploidy more likely with self-fertilizing plants than with plants that cannot self-fertilize?
What will be an ideal response?
ANS:
Changes in ploidy can cause reproductive isolation between individuals that have different ploidy numbers. By self-fertilizing, a plant that has a novel ploidy level will produce progeny that are reproductively isolated from other plants. A plant that cannot self-fertilize may be an evolutionary dead end and not be able to make progeny.
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What are the three checkpoints of the cell cycle and what is being “checked” during each one?
What will be an ideal response?
In what way do fungi reproduce?
a. asexually, through spores b. budding of the parent body c. sexually, through gametes d. asexually, through spores and budding of the parent body e. asexually, through spores, budding of the parent body, and sexually, through gametes
It is submerged only at the highest tide of the lunar
cycle. a. upper littoral b. midlittoral c. lower littoral d. intertidal e. neritic
Certain drugs prevent the formation of a hydrogen ion gradient across the inner mitochondrial membrane. What is the most likely consequence?
A) Most ATP production will stop, and the cell will die. B) ATP production will increase. C) Fermentation will stop. D) Glycolysis will stop.