Species
of Homo _ erectus_<span> found in Java
suggest that this species of hominine spread rapidly after leaving Africa</span>
As altitude increases, the amount of gas molecules in the air decreases—the air becomes less dense than air nearer to sea level. This is what meteorologists and mountaineers mean by "thin air." Thin air exerts less pressure than air at a lower altitude.
Answer:
Option b. is correct
Explanation:
If hydronium ion concentration 
is given then pH is given by ![-log[H_3O^+]](https://tex.z-dn.net/?f=-log%5BH_3O%5E%2B%5D)
The hydronium ion refers to the hydrogen ion in aqueous solution.
A Tomato has A Proton Concentration Of 0.00006 M
Here, 0.00006 is equal to 6 × 
So,
pH is given by - log [6 × ]
Option b. is correct
Answer:
The question lacks options, the options are:
A) No proofreading will occur. B)The DNA will supercoil. C)Replication will occur via RNA polymerase alone.
D)No replication fork will be formed.
E)Replication will require a DNA template from another source.
The answer is D
Explanation:
Prior to division of any cell, its genetic material needs to be replicated. Ideally, in a bacterial cell, this replication starts at a particular nucleotide sequence called ORIGIN OF REPLICATION. An enzyme called DNA HELICASE then binds to the origin of replication and breaks the hydrogen bonds between the double-stranded DNA molecule to form a Y-shaped Replication fork, which serves as a template for DNA polymerase III to bind and begin to add nucleotides.
However, if a mutation occurs at a certain gene dNAb and alters the action of HELICASE enzyme. Thus, it prevents the helicase from separating the double-strands of the DNA molecule containing the gene. Hence, no replication fork will be formed and subsequently no template for DNA polymerase's action.
