<u>Answer with explanation:</u>
1. Ligase - 5. joins the Okazaki fragments together
(Ligase is involved in joining the okazaki fragments together by sealing the nicks of the DNA strand.
2. Helicase - 1. unwinds the DNA molecule
(Helicase separates the two DNA strands at the replication fork.)
3. Polymerase - 2. synthesizes the complementary daughter strands
(Polymerase synthesizes the complementary daughter strand by adding nucleotides to the DNA.)
4. Topoisomerase - 4. creates nicks ahead of the replication fork to relieve tension from unwinding
(The highly coiled DNA is relaxed by creating nick ahead of the replication fork in the phosphate backbone of DNA strands.)
5. RNA primase - 3. synthesizes RNA primer at the initiation point
(RNA primase synthesizes an RNA primer (short sequence of RNA).)
The mouse, elephant, and porpoise, are all placental mammals, leaving the opossum. So the answer is D. Hope this helps
Organ is the term that can be used to describe the organizational level of the brain in the human body.
When we speak of the levels of organization, we refer to the possible divisions or stratifications in which it is possible to study the human body.
In this area, an organ is an associated set of tissues that share the same structure and function.
The scale of biological complexity places organs above tissues and below systems.
The human brain is a main and complex organ that is part of the nervous system, it controls the vital functions of the human body.
It is the organ in charge of controlling and coordinating all the movements we make and processing sensory information.
As an organ system at organizational level it works together with the spinal cord forming the central nervous system.
Therefore, we can conclude that organ is the term that can be used to describe the organizational level of the brain in the human body.
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