Fro the answer to the question above,
<span>Based on fossil evidence, eukaryotes evolved about <u>2.1 billion</u> years ago</span>.
<span>Approximately the first single-celled Eukaryotes appeared 2.1billion years</span>.
But the multicellular eukaryotes first appeared at 1.5 billion years ago.
I hope this helps
Answer:
The correct answer will be option-B.
Explanation:
Viral polymerases are the enzymes which play an important role in the viral genome transcription and replication.
Retrovirus is the single-stranded RNA viruses which replicate through a DNA intermediate and therefore requires the <em>RNA-dependent DNA polymerase or reverse transcriptase</em>. Reverse transcriptase encodes DNA from the strand of RNA which can be replicated and helps in the reproduction of the virus.
Thus, option- B is the correct answer.
The elbow (or olecranon joint) is the part of the upper limb between the arm and forearm. This articulation includes the region of the "elbow fold" (or ulnar fossa). It is a synovial joint complex of the upper human limb connecting the arm to the forearm. He thus unites three bones between them: the radius, the ulna and the humerus.
<span>The ulna is a long bone of the forearm, located at its inner side while the radius, the second bone of the forearm, is located at the level of the outer part (the same side of the thumb)</span>
A neighborhood with a mayor and people working to better the town
Based on the carrying capacity of the habitat and the changes that occurred in number of the two snake species, correct option is They occupy the same niche and are competing fully for all resources; option D
<h3>What is carrying capacity of a habitat?</h3>
The carrying capacity of a habitat is the maximum number of species the available resources in that habitat can sustain.
The data given of the species of snakes, Species A and Species B, indicate that they are both present in the habitat after a change occurs in the habitat.
Since the population of Species A became zero after Species B was introduced in the habitat, they occupy the same niche and are competing fully for all resources.
In conclusion, the competition between the species of snakes is responsible for the decline in Species A.
Learn more about carrying capacity at: brainly.com/question/23656166
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