Which statement is false?
a) in a tightly packed binary tree, each level contains about twice as many elements as the previous level.
b) when searching a tightly packed 1,000,000-element binary search tree, a maximum of approximately 20 comparisons need to be made.
c) the level-order traversal of a binary tree visits the nodes of the tree row-by-row starting at the root node level.
d) searching a binary tree for a value that matches a key value is slow for tightly packed trees.

d) Searching a binary tree for a value that matches a key value is slow for tightly packed trees.

Explanation:

Binary search tree is  node based binary tree structure. It has the following features:

Left subtree of a node contains only nodes with keys less than the node keys.

Right subtree of a node contains only nodes with keys greater than the node;s key.

Left & Right subtree each  must also a binary search tree.

the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation: