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
siniylev [52]
3 years ago
15

I Which structural characteristics is seen in RNA but not in DNA?

Biology
1 answer:
nekit [7.7K]3 years ago
3 0

Answer:

RNA has ribose, while DNA has deoxyribose.

RNA ha only one strand while DNA ha two complementary strands.

In RNA, there is uracil instead of thymine, like in DNA.

You might be interested in
Which one of the following is a major difference between the circulatory systems of earthworms and fish?
labwork [276]
<span>a. Fish have a single central heart; earthworms have several hearts.

</span>
Multi cellular organisms are made up of billions of cells each specialized to a unique role and these cells are organized into structural and functional units such as tissues and organs.
For each cell and organ to function optimally, it requires oxygen and nutrients and needs carbon dioxide and  metabolic waste taken away  in a  continuous, never ending  process.
<span>A mechanism  is needed to accomplish the important function of transporting the relevant materials to and from the cell. The circulatory system fits this  bill splendidly. It is a specialized organ system which allows blood  and lymph to flow through the entire body carrying nutrients such as glucose, amino acids and electrolytes as well as oxygen to each cell, at the same time carting away carbon dioxide and all sorts of metabolic waste over to excretory organs  to be expelled from the body.
</span>
6 0
3 years ago
Li is interested in ways to maximize the vitamin content in his fresh fruits and vegetables. Which of the following practices sh
OlgaM077 [116]

Answer:

Use cooking methods that minimize/eliminate contact with water.

Explanation:

Vitamins are important nutrients found in fruits and vegetables. Vitamins can be easily leached out and it is therefore recommended that the vegetables should be consumed immediately after purchase or stored in an airtight container.

The use of cooking method that eliminate contact with water such as freezing, keeping in a close container will help retain the vitamins, reduce degradation rate and prevent it form been lost.

Cutting will allow easy definition of vitamins and result in its lost.

4 0
3 years ago
18.<br> Is the diagram exothermic or an endothermic?
pogonyaev
Endothermic


:):):):):):)
8 0
3 years ago
Photosynthesis and Cellular Respiration: Are They Similar?
Korvikt [17]

Answer:

The two processes are similar in that they both produce energy, albeit in two different forms. ... The win-win of the two processes is that they both provide each other with the necessary ingredients for the process to take place: glucose and oxygen for cellular respiration, carbon dioxide and water for photosynthesis.

Explanation:

7 0
3 years ago
Read 2 more answers
True Or False? the total amount of matter on earth changes significantly over geological time scales, roughly every 300,000,000
zaharov [31]

The rate of atmospheric CO2 has never been as low as today and the temperature / CO2 content relationship is still poorly understood Since the Earth existed, that is to say 4.567 billion years ago [1 ], if it is indeed a constant is that it never remained fixed as it was, and that it was constantly deeply modified in a rather random way. This concerns as much the internal processes (in particular the composition of the lithosphere and the variations of the mechanisms affecting the continental drift) as the external processes

Among the latter, the atmosphere has not ceased to vary completely, particularly with regard to its gaseous composition. All of these internal and external processes have continually 'telescoped' and have led to complex feedbacks at the root of the many climate changes observed in the geological record. To these parameters are also added those piloted at the extraterrestrial scale, among the most important are the activity of the Sun or the variations of the orbital parameters of our Planet (precession, obliquity, ecliptic). The result is an extremely complex combination of regular cumulative processes, irregular, linear or not, often chaotic, playing at all time scales and affecting at any time the climate that constitutes an answer. Physicists, chemists, biologists, geographers ... geologists try each one from his pre-square to unravel this skein particularly difficult to understand. The synergies between the disciplines are fortunately numerous and the climate system is gradually exposed through the geological time.

L'étude du climat actuel semble plus simple que celle des paléoclimats, il s'agit cependant également d'une situation complexe vu l'importance des paramètres mesurables et mesurés qui contribuent à établir la dynamique de notre atmosphère aujourd'hui. L'étude de l'atmosphère est donc bien un des points incontournables pour qui veut comprendre un système climatique, elle est en prise directe avec la partie interne de la Terre (exemple des volcans, de l'érosion continentale suite aux orogenèses ou formations des chaînes de montagnes…), avec la partie externe ou superficielle (exemple des océans, des forêts…) et la composante extraterrestre (exemple des flux des rayons galactiques cosmiques, des impacts de météorites …). Nombre de ces paramètres sont cernés de manière satisfaisante depuis que la Terre existe. Cette connaissance débute avec le modèle du ‘paradoxe du Soleil froid' ou hypothèse astronomique du Soleil pâle[2].

Les premières atmosphères, des réservoirs de gaz à effet de serre

Ce modèle d'évolution du Soleil prédit que sa luminosité était plus faible de 25 à 30% de l'Hadéen à l'Archéen, soit d'environ 4,6 à 4,0 Ga (Ga = milliards d'années). Si l'on considère que la Terre possédait durant cette période une atmosphère semblable à la nôtre il faudrait alors attendre 2 milliards d'années (donc jusqu'au début du Paléoprotérozoïque) pour que sa température de surface dépasse 0°C, la température initiale à 4,6 Ga étant comprise entre -43 et -23°C suivant le modèle du ‘paradoxe du Soleil froid'. La quasi-totalité des océans aurait dû être couverte de glace. Les géologues n'ont jamais relevé de trace de glaciation globale durant cette longue période excepté quelques glaciers locaux à 2,9 Ga (glaciation ‘pongolienne') et à 2,4 Ga (glaciation huronienne). Ils concluent bien au contraire à une période chaude comme en témoignent notamment la présence de cyanobactéries à 3,8 Ga[3] et d'un cycle érosif de l'eau déjà actif ayant mené à l'accumulation de petits cristaux de zircon il y a 4,4 Ga[4]. L'eau était donc déjà présente 160 Ma (= millions d'années) après la formation de la Terre et les températures océaniques déduites des isotopes de l'oxygène et du silicium mesurés sur des roches siliceuses variaient entre 30 à 50°C (Archéen et Paléoprotérozoïque) bien loin d'un climat qui aurait du être globalement très froid comme le laisserait supposer un ‘Soleil pâle' de faible luminosité.

3 0
3 years ago
Other questions:
  • 5. Plants use carbon dioxide for the process of
    10·2 answers
  • Which of these geographic factors make Panama's location significant?
    6·2 answers
  • How does the warming of the world's ocean affect the water cycle?
    9·2 answers
  • When compared to a cheek cell, a muscle cell contains more of what
    7·2 answers
  • All of earths water, land, and atmosphere within which life exists is known as
    9·2 answers
  • What will happen if we put jelly on the leaves of a plant?
    5·1 answer
  • The ____ surface area exposed the ____ the weathering occurs.
    13·2 answers
  • (i givs brainliest ovo + 50 points) Which of the following is an example of static electricity?
    14·2 answers
  • Examine the equation.
    14·1 answer
  • The most abundant proteins in the muscles are what?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!