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ycow [4]
3 years ago
5

Studies of conjugation in multiple Hfr strains revealed that the bacterial chromosome was: circular. single stranded. directiona

l. None of the above
Biology
1 answer:
Vikentia [17]3 years ago
6 0

Answer:

circular

Explanation:

Studies of conjugation in multiple Hfr strains revealed that the bacterial chromosome was <u>circular.</u>

<em>Conjugation in bacteria is a process through which genetic materials are directly transferred from one bacterium to another. The process was first discovered by the experimental work of Joshua Lederberg and Edward Tatum in 1946. The donor bacterium first makes a copy of the genetic material by replication and then pass a copy to the recipient bacterium. </em>

It was during the process of conjugation that scientists discovered that the genetic material of the bacteria is a circular chromosome, also known as the F plasmid. The <u>circular chromosome breaks at a particular point and becomes a linear structure before replication and then folds back thereafter</u>. The replicated chromosome is linearly transferred to the recipient cell.

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Please help me! Just with these few, and I will mark brainliet!
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4 0
3 years ago
A scientist wanted to see if the number of eggs in a nest varied according to latitude. She decided to study a specific species
77julia77 [94]

Answer:

A. Does the number of eggs in a nest of this bird species vary with the latitude of the area the bird lives in?

B. The latitude of the area

C. The number of eggs

D. The species of the bird

E. The number of the bird eggs in a nest in a temperate zone area will be greater than that of a tropical area.

F. 600 nests

G. The number of eggs

Explanation:

A. In the investigation, the scientist wanted to see if the number of eggs in a nest varied according to latitude, therefore, the question she will be seeking an answer to is: does the number of eggs in a nest of this bird species vary with the latitude of the area the bird lives in?

B. The independent variable is the variable that is not affected by the other variables being measured in an investigation. In the investigation by the scientist, the latitude of an area is the independent variable in that it is independent of changes in the other variable- the number o eggs- in the investigation.

c. The dependent variable is the variable that is affected by changes to the other variable in an investigation. The number of eggs is expected to vary according to latitude, is therefore, it is the dependent variable.

D. The constant is the factor that does not change during the experiment. The bird species is the constant as it does not change in the investigation.

E. A hypothesis is a specific statement predicting the result of an investigation or study.

In this study, the hypothesis could be: The number of the bird eggs in a nest in a temperate zone area will be greater than that of a tropical area.

F. The sample size gives the the total number of subjects,  individuals or observations in a study. In this case, the subjects are bird nests, and the sample size is 600 nests.

G. The number of eggs in all the nests were counted; therefore, it is the repeated measure.

7 0
3 years ago
1. Organized crime now accounts for how much of the global GDP?|​
makkiz [27]

Answer:

15%

Explanation:

Criminal activity now accounts for over 15 percent of the world's GDP,

6 0
3 years ago
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SVETLANKA909090 [29]

Answer:

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7 0
3 years ago
Why do fronts tend to create precipitation?
Licemer1 [7]
Because when the air cools hot air rises and so does the moistier and then it condenses and produces clouds which produce rain
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5 0
3 years ago
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