Determine the correctness of [a] A zygote and its immediate descendant cells are unspecialized and called totipotent; and [r] Totipotent cells can differentiate into only a few cell types.
Both [a] and [r] are false.
Both [a] and [r] are true but [r] is not the correct reason for [a].
Both [a] and [r] are true and [r] is the correct reason for [a].
A zygote and the earliest blastomeres have the broad developmental potential intended by totipotency, including embryonic and supporting extraembryonic lineages. Capacity for only a few cell types instead describes restricted potency, not totipotency. Thus the assertion is true and the reason false, D; the word “only” reverses the defining property.
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