1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
prisoha [69]
3 years ago
8

1. Why must DNA have thymine instead of Uracil? 2. Why is it necessary for RNA to have uracil instead of thymine?

Biology
1 answer:
Zigmanuir [339]3 years ago
7 0
Thymine has a methyl group and is better suited for the storage property of the DNA molecule as it is far more stable compared to Uracil.
RNA contain Uracil instead of thymine so as to make differentiation of RNA molecule from DNA molecules easier.
You might be interested in
What does genetics mean in your own words?
BartSMP [9]

Answer:

the study of heredity and the variation of inherited characteristics.

8 0
3 years ago
Read 2 more answers
The man with short eyelashes in Generation II marries a woman with long eyelashes. This woman reports that everyone in her famil
STatiana [176]
No, they cannot be sure because the man has short eyelashes so the children each get characteristics from each parents so some may have long eyelashes and some may have short eyelashes.
6 0
2 years ago
Polygenic characteristics are disproportionately affected by natural selection.
rodikova [14]

Answer:

The natural selection on polygenic traits affects selection.

Explanation:

The natural selection process allows changes in frequencies of alleles in a character that is determined by single gene. The polygenic characteristics are disproportionately affected by natural selection as natural selection affect the phenotype distribution.

This occurs in three ways that are disruptive selection, stabilizing and directional selection.

6 0
3 years ago
Identy three advantages and three disadvantages of bioplastics
swat32

Explanation:

<em><u>Advantages of bioplastics</u></em>

1.Less oil is used to produce petrochemical (oil-based) plastics which pose a great risk to the environment.

2.The common bioplastics can be injection molded and shaped to take the same form as traditional thermoplastics. In some cases, the bioplastics are stronger and lighter, too, so they are not necessarily only suitable for very niche applications.

3.Bioplastics are more marketable, for example, their usage may improve the value-add of a product through a green marketing campaign. After all, studies have shown that ‘80% of European customers want to buy products with a minimal impact on the environment,’ so bioplastics may represent a useful argument for brands.

<em><u>Disadvantages of bioplastics</u></em>

1.First, bioplastics are generally NOT cost-competitive compared to their oil-based counterparts. They are generally two or three times more expensive than the major conventional plastics such as PE or PET, and their production is plagued by low yields and being expensive. This disadvantage should be less acute when manufacturing plants become larger and benefit from economies of scale. A good example is Braskem’s 200,000-tonne bio polyethylene plant (equivalent to about 20% of the world’s current bioplastics production).

2.There is a concern that bioplastics based on terrestrial crops could harm food supplies; however, new innovations using food waste could be helpful in this regard and the concerns would seem to be unfounded as: ‘Perhaps 300,000 hectares are used to grow the crops which the industry processes into plastics. For comparison, this is about 0.02% of the world’s total naturally irrigated area available for cultivation. Even if half the world’s plastics were made from crops grown on food land, the industry would only require 3% of the world’s cultivated acreage.’

3.Crop-based bioplastics require fertile land, water, fertilizers, and are reliant on weather conditions. This means that the supply of raw materials for bioplastics are at risk of natural phenomena, such as drought.

6 0
3 years ago
Read 2 more answers
If the Earth is 4.6 billion years old. However, the oldest sea floor is only bout 180 million years old. What do you think is th
Vera_Pavlovna [14]

Answer:

I think when the earth was created it took a time. Then dinosaurs came. Then tey extinct because falling of asteroid on Earth.Then after a period of time the sea,mountains and other natural things were made again.

6 0
2 years ago
Read 2 more answers
Other questions:
  • How does leaf structure facilitate photosynthesis
    15·2 answers
  • 1. Some animals get water from plants they eat and others drink water
    14·1 answer
  • The aurora borealis is caused by the _______ which is a part of the thermosphere
    7·2 answers
  • compare Lamarck's theory of acquired characteristics to Darwin's theory of natural selection what evidence supports natural sele
    7·1 answer
  • Can a person be composite<br>​
    13·2 answers
  • 6.) Water is essential to all living things. Discuss THREE properties of water
    9·2 answers
  • What happens to the sun's energy when it hits clouds, ice, and snow?
    10·1 answer
  • PLEASE HELP
    11·1 answer
  • Name the third trophic level in the food chain
    15·1 answer
  • The term demographic transition refers to ________.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!