Match each item in the left column with the single most appropriate item in the right column. Each number should be used only once. A. Auxotroph
B. Conjugation
C. Hfr
D. Transduction
E. F'
F. Transformation
G. Competent
1. requires cell-to-cell contact
2. capable of taking up DNA
3. uptake of DNA from external medium
4. requires at least one nutrient for growth
5. F factor that has picked up a piece of the bacterial genome
6. E. coli strain with Ffactor integrated into bacterial genome
7. requires virus

A. Auxotroph 4. requires at least one nutrient for growth

B. Conjugation  1. requires cell-to-cell contact

C. Hfr  6. E. coli strain with Ffactor integrated into bacterial genome  

D. Transduction 7. requires virus

E. F' 5. F factor that has picked up a piece of the bacterial genome

F. Transformation 3. uptake of DNA from external medium

G. Competent 2. capable of taking up DNA

Explanation:

Auxotrophs are those organisms able to synthesize organic compounds required for their growth.

Conjugation is the genetic transfer between bacteria through cell-to-cell contacts.

In bacteria, the Hfr chromosome is linearly transferred from F  to F- cells.

Transduction is a genetic process where exogenous DNA fragments are introduced into another cell via a viral vector.

The F factor (fertility factor) is a bacterial plasmid that allows to transfer genetic information between donor and recipient cells during conjugation.

Bacterial transformation is the horizontal transfer of genetic material by which bacteria obtain DNA from its environment.

In bacteria, competence refers to the ability to take up exogenous DNA from the external environment.

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explanation:

the fossil record extends back to a dog-like ancestor some 55 million years ago, which gave rise to the first horse-like species 55 to 42 million years ago in the genus eohippus.