Answer:
B. Virus.
Explanation:
Hello.
In this case, since bacteria (A.) reproduce via asexual reproduction via mitosis and the animal (D.) and vegetal (C.) cells could reproduce via sexual or asexual reproduction depending on the organism, they do not need a host to start the replication of the DNA and therefore reproduce. In such a way, it is widely known that viruses need a host that facilitates the replication of their DNA or RNA (depending on the virus) since they only have their genetic information but they do not have neither the RNA nor the DNA polymerase that favor such process, that is why they need a host.
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Answer:
A plant cell is surrounded by rigid cell wall whereas animal cell does not have cell wall. Presence of a large vacuole in plant cell, which is small in animal cell. Plant cells are larger than animal cells. Plant cells have plastids whereas animal cells do not have plastids.
Answer:
Continental drift theory is the correct answer
Answer: The SA node
Answer choices are:
<span>A. </span>The AV node
<span>B. </span>The SA node
<span>C. </span>The purkinje fibers
<span>D. </span>The AV bundle
The SA node<span> is the heart's natural pacemaker consisting of a cluster of cells located in the upper part of the wall of the right atrium. (the right upper chamber of the heart). The electrical impulses are produced and sent out from there to regulate heartbeat. This is also called the sinus code. </span>
<u>Question</u><u>:</u>
Most destructive kind of mass movement
a. Slump
b. Mud-flow
c. Landslide
d. Creep
<u>Answer:</u>
Most destructive kind of mass movement is Landslide
Explanation:
Landslide are the form of mass wasting, which results in downward movement of soils and those rocks which because of the gravitational force. This landslide is made up of five other phases like falls, topples, slides, spreads and flows etc. when these landslides occur inside the submarine leads to tsunamis which results in the damage in coastal areas. Most of the mass movements occurs due to the weathering, or can say erosional debris cover on the slope which are prone to mass movement
