Which statement about platelets is false? platelets have nuclei. platelets are cell fragments. platelets are involved in blood clotting. platelets differentiate from the daughter cell of a stem cell. none of the above statements are false.

Platelets have nuclei

would be the correct answer. While reading all the statements i recognized all of them as traits of platelets except the obvious one which is Platelets have nuclei. platelets have no nuclei.

Platelets have nuclei.

Explanation:

Platelets are also called as thrombocytes. These are irregularly shaped structures which do not posses nucleus. They are not considered as true cells instead they are called as fragments. As they do not posses nucleus, they do not contain the nuclear DNA. But they do contain mitochondria, hence they also produce mitochondrial DNA. Their main function is to produce blood clots at the site of injuries. Hence, they prevent the loss of excess blood during bleeding.

many phylogenetic trees have a single lineage at the base representing a common ancestor. a lineage that evolved early from the root and remains unbranched is called basal taxon. when two lineages stem from the same branch point, they are called sister taxa.

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explanation: