All ornithischians are characterized by:. i. sharp pointed teeth, forward pointing pubis, bipedal stance
ii. synapsid skull, backward pointing pubis, ossified tendons
iii. ossified tendons, forward pointing pubis
iv. leaf-shaped teeth, backward pointing pubis, ossified tendons

the answer is c

explanation:

correct answer is option a.

tropopause, stratopause and mesopause have all in common aspect that is point of maximum temperature in its layer of the atmosphere. all layers of atmosphere observe abrupt change in temperature. tropopause is the boundary between troposphere and stratosphere. stratopause is the boundary between stratosphere and mesosphere. mesopause is the boundary between mesosphere and thermosphere. these all boundaries are ranges between altitude of 0 to 80 km.

haploid cells;

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: