Uracil is the base that is found only in RNA and is not present in DNA. In RNA, uracil replaces thymine, which is one of the four bases found in DNA. This difference in the nitrogenous bases is one of the key distinctions between RNA and DNA.
RNA stands for ribonucleic acid. It is a single-stranded molecule that is made up of nucleotides, which are the building blocks of RNA.
The nitrogenous bases found in RNA are adenine (A), guanine (G), cytosine (C), and uracil (U). But uracil is the only base found in RNA. The reason for this difference in bases is due to the fact that RNA is a single-stranded molecule, while DNA is double-stranded.
The presence of uracil in RNA allows it to form complementary base pairs with adenine, which helps to stabilize the RNA molecule.
Therefore, the nitrogenous base that is found only in RNA is uracil. This base plays an important role in RNA structure and function, allowing it to form complementary base pairs with adenine and contribute to the stability of the RNA molecule.
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How is a brain injury classifled ?
Brain injury classified as an injury of the central nervous system.
When a flower is in bud it is protected from _____.
Select all the correct answers.
Which of the following organisms can have all of the energy it uses to move, grow, and survive traced back to radiant energy from the Sun?
a tree
a human
a flower
a bacterium
a fish
Answer: A. ,C.
Explanation: It's in the food chain and constantly need's water.
The correct answers are:
A treeA flowerA bacteriumA fishWhy organisms need sunlight?All of these organisms can have all of the energy they use to move, grow, and survive traced back to radiant energy from the Sun. Trees and flowers undergo photosynthesis to convert sunlight into energy in the form of glucose, which they use to grow and carry out metabolic processes.
Bacteria can also undergo photosynthesis, or they can use organic matter as a source of energy, which ultimately comes from the Sun through the food chain. Fish, as well as other animals, obtain their energy by consuming other organisms that have obtained energy from the Sun through photosynthesis or other means.
Humans are also ultimately dependent on the Sun's energy, but they obtain their energy indirectly through the food they consume, rather than directly from photosynthesis.
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Which of the following is NOT stored in the bone?
Bone Inside
A.
calcium
B.
fat
C.
minerals
D.
water
Answer:
water
Explanation:
The expansion of the ranges of tropical fish was most likely caused by-
A. agricultural runoff that contributes to dead zones in the ocean
B.global droughts that raise the salt concentration of ocean waters
C.the rising temperatures of ocean waters
D.acid rain pollution that lowers the pH of ocean water
Answer:
C
Explanation:
The expansion of the ranges of these fish was most likely caused by the rising temperatures of ocean waters. This is because these types of fishes live in both fresh-water and salt-water but only in aquatic tropical environments around the world. The increase in temperatures of ocean waters has provided more suitable habitats for these fishes to expand to.
What does the writer use to help readers understand
the sequence of steps?
What should the writer add when verbally presenting
the procedure to a group?
cup
How to Make Slime
For a fun activity, try making slime. You will need a 3-
quart mixing bowl, a tablespoon, 1/2 cup of shampoo, 1/4
of cornstarch, and 6 tbsp water.
Combine 1/2 cup shampoo and 1/4 cup
cornstarch in mixing bowl.
Add 1 tbsp water and stir.
Mix in 5 tbsp of water, one tablespoon at a time,
stirring well after each addition.
Answer: the numbered list and a demonstration
Explanation:
yethirrrr got it right
Answer:
1) A numbered list
2) A demonstration
Explanation:
What are the components needed for a full ecological community to be successful?
Answer:
Explanation:
A community structure is define by the diverse organism present and the various number of species.
A community requires both biotic and abiotic factor to form a good structure.
Base population is needed - this are the primary producer, that transfer energy to other organism in the environment. The produce their food themselves.
Consumers - consumers feeds on producers, herbivores animals feeds on producer/plant while carnivores feeds on herbivores. Energy is then transfer when they chemical reaction takes place via the food comes
Decomposer - They act on the dead and remains of plant and animal. They help release nutrient back into the soil. Example of decomposer is earth worm.
If the population of rabbits in this ecosystem decreased dramatically because of certain environmental changes, which organisms’ food supply would decrease?
A.
owl and snake
B.
jackal and wildcat
C.
green plant and mouse
D.
goat and wildcat
Answer:
A. Owl and Snake
Explanation:
A green plant cannot eat a rabbit. Neither can a goat.
B. could be the answer but I believe that A. is the answer because I'm positive that those animals eat rabbits.
Hope this helped :)
Identify and describe the three ways that mutation affect organisms
Answer:
they may cause the development of a disease-causing allele
they may cause the development of a more beneficial allele
they in some cases, may have no noticeable affect
Explanation:
Answer:
Sample Response: Mutations may be beneficial, harmful, or neutral to organisms. If the change caused by a mutation is useful to the organism, then it is beneficial. If the change is damaging to an organism, then it is harmful. If the change is neither useful nor damaging, then the mutation is neutral.
hope this helped
Predation is responsible for the _________ we see in modern organisms.
evolution
co-evolution
nutrients
adaptations
3. Photosynthetic organisms such as plants, algae, and some bacteria and archaea can convert solar energy into ___________.
A. Nuclear energy
B. Potential energy
C. Kinetic energy
D. Chemical energy
When is the lac operon most active?
A. When glucose levels are high and lactose is present
B. When glucose levels are low and lactose is absent
C. When glucose levels are low and lactose is present
D. When glucose levels are high and lactose is absent
Answer: The correct answer to the question is option WHEN GLUCOSE LEVELS ARE LOW AND LACTOSE IS PRESENT.
Explanation: To start with,Lac operon can be simply defined as a part of the DNA that is under the part of the DNA is manipulated and controlled by the same promoter,they can be found in some prokaryotic cells giving room for regulation over excess synthesis of protein.so simply put,these specific segment of the DNA binds with the segment of the polymerase of RNA so that transcription of the mRNA from the operon genes will be achieved.
Lac operon is also known as lactose operon, it is seen in some enteric bacteria like e.coli where they play a crucial role in coding of genes for those proteins that function in moving lactose into the cystocel and digesting it to form glucose that is used for energy generation. These lac operon are are most active when glucose levels are low and lactose is present,with the low level of glucose, the lac operon can be transcribed to a high level,this is to ascertain that the bacteria only gets to activate the lac operon and can only make use of it,that is using lactose when all the preferred energy source from glucose has been exhausted.
Answer:
c.
Explanation:
What's the capstone project?
is it important?
Answer:
A capstone course, also known as capstone unit or a senior thesis or senior seminar serves as the culminating and usually integrative experience of an educational programtion A capstone project plays a vital role in preparing a student for the future course of learning. It gives students a chance to retain whatever they have been learning during their college studies and apply it once they pursue a specific academic profession in the college.
A capstone project is a culminating academic undertaking that often marks the final contribution or achievement in a student's academic career. It is often undertaken in the final year of a programme, such as a bachelor's or master's degree. The importance of a capstone project can be significant for several reasons:
Integration of KnowledgePreparation for the WorkforcePortfolio PieceAssessment of Learning OutcomesThe details of the capstone project vary according to program requirements, institution and subject of study. A capstone project's ability to integrate and apply the knowledge, abilities and concepts acquired during the academic program determines its importance. It gives students the chance to demonstrate their understanding, critical thinking, problem-solving and research skills in a practical setting. Research, data analysis, problem-solving, and the creation of useful results or products are often components of capstone projects.
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help me with those questions please!!
Explanation:
5=noble gases
6= 6 valences( not entirely sure though)
sorry
Answer: Noble gases
There is no answer since it's stable
Due to increase in the number of electrons occupied in the energy level s
V
Explanation:
An allele that expresses itself in a heterozygote is a(n)
A. recessive allele
B. allele pair
C. dominant allele
Someone help me :)
What are enzymes? (Check all that apply)
Proteins
Antibodies
Hormones
Catalysts
Fats
Chains of amino acids
None of the above
Answer:
biological molecules biochemical reactions
Answer:
Here it is
Explanation:
When listing the levels of organization in organisms from least complex to most complex, which level is just below organs in complexity?
Answer:
Tissue
Explanation:
Multicellular organisms are complex and every complex organism consist of building blocks. This is the case in the level of organization in living organisms. All living organisms are made up of CELLS. In multicellular organisms i.e. more than one, the cells that perform a similar role come together to form the TISSUE.
Tissues with similar function together forms the ORGAN. Organs that perform similar functions collectively makes up ORGAN SYSTEM. Based on this, the level of organization moves from the least complex "cells" to most complex "organ systems".
The order is as follows:
Cell-----> Tissue-----> Organ-----> Organ systems
Give two examples of pseudo coelomate animals.
Answer:
Roundworm & Taridgrade
Explanation:
bruh
Answer:Nematodes,Rotifers
Under what condition will diffusion take place most rapidly?
Answer:
From my opinion it would be:
Temperature: Molecules, like practically everything else you can think of, tend to diffuse faster as temperature increases, as this increases the random collision between molecules and increases the rate of diffusion.
Explanation:
Hope it works out !!!What could its hardness be if it can scratch a quartz mineral?
Any mineral with a Mohs hardness of 7 or greater could scratch quartz. Examples would be quartz (7), topaz (Mohs 8), corundum (9), and diamond (10).
hey um hopes this helps please try to answer my newest question please
Answer:
7 Hardness of a quartz mineral
Explanation:
Answer:
Orthoclase feldspar mineral is 6 percent hardness
Quartz mineral is 7 hardness
Topaz mineral is 8 hardness
Corundum mineral is 9 percent hardness
So you are asking for the hardness if it can scratch a quartz mineral. The answer is that Quartz mineral is 7 percent hardness if it can be scratch.
Key words:
1: Mineral
2: Hardness
Hope this helps.
What is one of the main functions of the large intestines?
break down food chemically
break down food physically
absorb nutrients
absorb water
Answer:
absorb water and mineral salts.
Explanation:
Answer:
D. absorb water
How does exercise affect heart rate of 9th grade student?
we set up an experiment testing different lengths of time of exercise (minutes) on the
heart rate of students
Growing food in urban areas could improve full security worldwide
Answer:
yes i hope that helps
ok
What is happening within the moon jelly population when the size of the moon jelly population is stable.
Answer:
The jelly is able to hold the weight of gravity
Explanation:
To reproduce, organisms need to release energy from energy storage molecules. If there are more energy storage molecules available to the moon jellies, they can reproduce more, resulting in more births. Fewer deaths would also cause the jelly population to increase.
What are moon jellies made of?The moon jelly is one of the most common jellyfish in Rhode Island. Its body shape resembles an umbrella, with four equal-sized horseshoe-shaped gonads in the center of its body. Moon jellies are made up almost entirely of water and will not hold their shape when out of the water.
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What are the two molecules phages made out of?
Answer:
Like all viruses, phages are simple organisms that consist of a core of genetic material (nucleic acid) surrounded by a protein capsid. The nucleic acid may be either DNA or RNA and may be double-stranded or single-stranded.
Explanation:
i realllyyyyy need help right now. it’s due it 30 mins!!
if anyone is good at science. please help
it’s on genetics
Answer:
LL
Explanation:
Answer:
1st Q A: LL
2nd Q A: A spotted coat
Why does an animal inhale?
A) To get rid of cellular waste like oxygen from the body.
B) So cells can use the oxygen in the air to produce energy.
C) To get rid of cellular waste like carbon dioxide from the body.
D) So cells can use the carbon dioxide in the air to produce energy.
11. What did Darwin think about on his journey home to England?
12. After he returned to England, what hypothesis did Darwin develop to explain his findings?
Do people with AIDS make antibodies?
Answer:
Yes, people with aids do produce anti bodies.
Explanation:
People who have HIV produce special antibodies that enable them to suppress the virus.
Why doesn’t urine flow back to the ureters?
Answer:
With vesicoureteral reflux, urine flows backward from the bladder, up the ureter to the kidney. It may happen in one or both ureters. When the "flap valve" doesn't work and lets urine flow backward, bacteria from the bladder can enter the kidney. This may cause a kidney infection that can cause kidney damage.