All categories

3 years ago

The first genetic material on earth was probably ________.

Biology

1 answer:

vfiekz [6]3 years ago

3 0

The first genetic material on earth was probably ________.

A) DNA produced by reverse transcriptase from abiotically produced RNA

B) DNA molecules whose information was transcribed to RNA and later translated in polypeptides

C) self-replicating RNA molecules

D) oligopeptides located within protobionts

Answer:

C) self-replicating RNA molecules

Explanation:

RNA molecules are considered to be the first genetic material that evolved on the earth. Assembly of nucleotides gave rise to single stranded RNA molecules that could catalyze various processes. These RNA molecules were able to replicate themselves. In this way, the self-replicating RNA molecules served as the first genetic material. Later, the accumulation of several mutations such as the evolution of thymine base from uracil and deoxyribose sugar from the ribose sugar gave rise to DNA.

You might be interested in

Of all the species that have ever lived on planet earth, what percentage are now extinct?

erica [24]

I think it's 90% but I am not sure.

4 0

3 years ago

How is a job in fish and wildlife management different from one in forestry?

grigory [225]

Answer:

The wildlife manager's job is to maintain the number of animals in a habitat at or below the habitat's carrying capacity so that no damage is done to the animals or to their habitat. In a sense, a wildlife manager's task is similar to a rancher's.

Explanation:

thank me later

5 0

3 years ago

You find that 21% of the population exhibits the recessive trait for eye color and the other 79%

GaryK [48]

It could be 99% or 100%

7 0

3 years ago

The image above shows the natural progression of a forest in a process called ecological succession. If a mature climax forest i

liubo4ka [24]

Explanation:

The community may enter primary succession.

Ecological communities are highly dynamic- they gradually evolve. Typically their progression involves:

colonizing species exploiting uninhabited areas (Primary succession)
becoming a habitable and increasingly complex community
there is increased diversity of organisms (Secondary)

The makeup of biological communities is crucial to defining Primary and Secondary succession; eventually, through changes in this makeup, a steady-state or equilibrium is reached called a climax community. While Primary succession starts off with the modification of a previously unoccupied area along with increasing variation; secondary succession begins after major disruption in the community such as fires, storms and flooding.

Like the harvested climax forest, secondary communities do not begin with the removal of soil and all biological life; other species, may be more suited to the altered conditions and begin to modify the area creating a new community.

However, the process of becoming a climax community can be pretty complicated- it is very dependent on other factors like temperature and rainfall. Communities that experience rapid change, frequent major disruptions and even human intervention, are less likely to attain a stable equilibrium and may never become climax communities.

Learn more about primary succession at brainly.com/question/1603854

#LearnWithBrainly

8 0

3 years ago

What is the function Alveoli?

Gnoma [55]

Answer:

The main function of the alveoli is storage of air for a shorter period which permits absorption of oxygen into the blood. The gaseous exchange of oxygen and carbon dioxide typically takes place in the alveoli. The main function of the bronchiole is to allow the passage of air freely into the lungs

8 0

3 years ago

Read 2 more answers