user103490: From my understanding of the Bitcoin network, Merkle Hash Tree is used on a block level, where each transaction is a leaf of the tree (except the situation that if transaction count is odd, the last leaf is a duplicate) and the root is a mingled hash of all the transactions in a block.
Today I read this post, in which it says

Merkle trees, in turn, use the hash to connect each block.

This is a bit ambiguous to me. Does that mean a Merkle Tree is also used on a network level, where each block is a leaf of the tree? I thought Bitcoin uses a linear chain architecture, similar to a singly linked list.
Is Bitcoin Blockchain a linear chain or a Merkle Tree architecture? Thank you.

user48884: There is no merkle tree linking blocks. Blocks are connected linearly by having the previous block hash.

103490: <p>From my understanding of the Bitcoin network, Merkle Hash Tree is used on a block level, where each transaction is a leaf of the tree (except the situation that if transaction count is odd, the last leaf is a duplicate) and the root is a mingled hash of all the transactions in a block.</p>
<p>Today I read this <a href="https://medium.com/brandlitic/difference-between-blockchain-vs-linked-list-c8901ce1ca96" rel="nofollow noreferrer">post</a>, in which it says</p>
<blockquote>
<p>Merkle trees, in turn, use the hash to connect each block.</p>
</blockquote>
<p>This is a bit ambiguous to me. Does that mean a Merkle Tree is also used on a network level, where each block is a leaf of the tree? I thought Bitcoin uses a linear chain architecture, similar to a singly linked list.</p>
<p>Is Bitcoin Blockchain a linear chain or a Merkle Tree architecture? Thank you.</p>
 48884: <p>There is no merkle tree linking blocks. Blocks are connected linearly by having the previous block hash.</p>
