In a bush pattern of evolution,the uppermost tips of the branches represent

The origin of seeds in land plants was achieved about $345 \; \text{million}$ years ago, in lineages recognized as ancestral to all more advanced vascular plants in:

Which of the following is not included in the $Paleozoic$ era?

Which is the oldest fossil in the evolutionary history of the horse?

Which of the following is correctly matched with respect to the era and its period?

The flowering plants originated in which of the following periods?