Examlex
For each blank in the following sentences, select the present tense helping verb can or the past tense could. To determine whether a sentence is in the present or past tense, look at other verbs in the sentence or look for a time word.
-When I ate the pancakes, I __________ taste the buckwheat flour.
Post-mating, Prezygotic
Describes reproductive barriers that occur after mating but before the formation of a zygote, such as sperm-egg incompatibility.
Reproductive Isolating Barrier
Factors that prevent different species from interbreeding, thus maintaining species boundaries.
Eggs Get Fertilized
The process by which sperm and egg unite to form a zygote, initiating the development of a new organism.
Cryptic Species
Cryptic species are lineages that historically have been treated as one species because they are morphologically similar but that are later revealed to be genetically distinct.
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