Why do you think mutations are necessary for species to change?

1 answer:

8 0

Mutation is the primary cause of all genetic variation. Mutation is important as the first step in evolution, as it produces a new sequence of DNA for a particular gene, producing a new allele. Recombination, through intragenic recombination, may also generate a new DNA sequence (a new allele) for a particular gene.

You might be interested in

Give a brief description about how the SHAPE of DNA was discovered. Mention some of the scientists involved.

iren2701 [21]

<u>Brief description about how the SHAPE of DNA:</u>

DNA is a double helical structure. The structure of DNA was described by Watson and Creek. They were scientists who got the structure of the DNA by Xray crystallography. They said that the DNA is a double helical structure that is composed of two sugar phosphate backbones that are having one nitrogen base on each sugar molecule.

Each sugar phosphate backbone is at an angle of 36° with the preceding or the succeeding one. They are placed at 20A apart. Each nitrogen base is either Adenine, thymine, guanine or cytosine. Adenine is complementary to thymine and guanine to cytosine. They are complementarily present on the two corresponding sugar phosphates chains. They are 34A to complete one full cycle of the helix.

5 0

3 years ago

When too much sugar is consumed in the diet, glucose in the blood exceeds the body's need for energy, and glucose is stored as g

Nana76 [90]

Answer:Lipid

Explanation: Glucose is converted by insulin and in excess it is stored in fat tissue as glycogen. Excess of sugar been stored up in the body can further leads to diabetes.

6 0

3 years ago

Arrange the events in the correct order to describe how the magnetic field forms around Earth.

horsena [70]

The correct sequence of events is : C,D,B,A.
Iron rich magma in the earth's core heats up because of radiation and the pressure exerted by the other layers of the earth. This heat in the crust trigger convection currents in the mantle. The magma closest to the core will be hotter and therefore less dense than other layers. Being less dense the layer will rise towards the crust, eventually becoming cooler and sinking back down in a circular motion.
The continued circular motion creates electric currents which then generates the magnetic field.

6 0

4 years ago

How can you protect yourself from biological hazards associated with human sources?

jarptica [38.1K]

Answer:Ways of protecting one's self from human sources of biological hazards include: Effective use of personal protective equipment such as hand gloves, nose masks, face cover, shoe cover.

Explanation:Human sources of biological hazards may include waste products from human such as faeces, urine and also fluids such as blood from bleeding wound, saliva and so on. These substances may harbor bacterial and viral infections which may result in biological hazards. Therefore, good personal hygiene and use of personal protective equipment will protect one from biological hazards related to human sources.

3 0

3 years ago

Read 2 more answers

Draw an mrna strand that is complementary to the dna strand aattgc. circle a nucleotide

saw5 [17]

I think it's uuaacg since the t isn't in the mRNA strand. So in the mRNA strand as and a,u,c,g DNA strand as a,t,c,g!

5 0

4 years ago