Answer:
Unlike DNA, RNA is almost always a single-stranded molecule and has a much shorter chain of nucleotides. RNA contains ribose, rather than the deoxyribose found in DNA (there is a hydroxyl group attached to the pentose ring in the 2' position whereas RNA has two hydroxyl groups). These hydroxyl groups make RNA less stable than DNA because it is more prone to hydrolysis. Several types of RNA (tRNA, rRNA) contain a great deal of secondary structure, which help promote stability.
Explanation:
What is a RNA molecule?
Well, RNA consist of aminoacids. An aminoacid is built up of three bases, which is a micture of a nucleoside (organic molecule), phosphatgroup and the base (A,T,G,C). This package is also called nucleic acid.
So RNA is built up the same way as DNA, but it's just a helix and not a duople-helix (DNA) and has got the base U instead of the base T. You can see that RNA is a molecule because its built up of molecules.
DNA is double-stranded and contains deoxyribose and thymine, whereas RNA is single-stranded, contains ribose, and has uracil instead of thymine.
Explanation:There are several key structural differences between RNA and DNA molecules. First, DNA is double-stranded, forming a double helix, while RNA is single-stranded. This means the DNA consists of two strands of nucleotides wound around each other, while RNA is just one strand of nucleotides. Second, the sugar component of the nucleotides in DNA is deoxyribose, while in RNA, it's ribose. This gives each molecule its name: DNA stands for deoxyribonucleic acid, and RNA for ribonucleic acid. Lastly, DNA and RNA differ in one of their bases: DNA contains the base thymine (T), while RNA contains the base uracil (U).
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What is a major difference between Animalia and Plantae kingdoms?
A) Animals get their nutrients from plants and other animals while plants get their nutrients from oxygen.
B) Plants stop growing when they become adults, but animals continue grow throughout their lives.
C) Plants produce their own food using sunlight and animals need other organisms for nourishment.
D) Animals need water to live, but plants are able to survive without it.
The answer is unquestionably C.
The correct statement about the difference between Animalia and Plantae kingdoms is the following:
Plants produce their own food using sunlight and animals need other organisms for nourishment.What is the Animalia kingdom?They are multicellular organisms and enjoy a high level of specialization in tissues, they are heterotrophic beings, which means that they feed on other living beings and move autonomously.
What is the Plantae kingdoms?It is the kingdom that brings together all forms of terrestrial plant life (trees, shrubs, grass, etc.) and all aquatic algae, as long as they carry out some form of photosynthetic nutrition.
Differences between Animalia and Plantae kingdomsThe members of the Plantae kingdom are all autotrophs, that is, capable of generating their own food from inorganic matter.Members of the Animalia kingdom cannot produce their own food like plants do, so they must consume organic matter from other living things to survive.Therefore, we can conclude that the Animalia kingdom is distinguished from the Plantae kingdom by lacking chlorophyll (they do not photosynthesize) and are heterotrophs.
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People around the world today can enjoy fruits such as oranges, grapes, and watermelon without having to pick out the seeds. How can farmers best ensure that grocery stores are well supplied with these seedless fruits?
A.
by removing all the seeds from the fruits after they are harvested
B.
by encouraging bees to only cross-pollinate seedless plants
C.
by allowing fruit-bearing plants to naturally reproduce
D.
by selectively breeding seedless fruits
D, because that is the only way to guarantee the fruit to be 100% seedless
Answer:
d
Explanation:
Scientists have recently modified the bacteria that cause tooth decay by inserting a fragment of DNA into the bacteria's DNA that prevents it from producing lactic acid. What is the new DNA called?
foreign DNA
restriction DNA
recombinant DNA
transgenic DNA
Answer:Recombinant DNA
Explanation:Recombinant DNA is basically a genetically modified DNA that is produced in the laboratory by bringing together different strands of DNA and causing them to bond in order to form a new genome or gene sequence and the whole procedure in performed in Vitro (in laboratory)
The DNA sequence is then inserted into the host to induce specific type of responses.
to what was cesar Chavez referring when he said. "si se puede"
I'm not gonna lie, I have absolutely no idea but I can at least translate it lol.
It means "You can do it."
Hopefully this helped.... :)
"Si se puede" by Cesar Chavez referred to a message of hope and collective action aiming for social and labor change. This phrase became iconic in the struggle for improving the conditions of migrant laborers in California, emphasizing nonviolent protest and solidarity.
Explanation:To what was Cesar Chavez referring when he said, "Si se puede"? Cesar Chavez's declaration, "Si se puede", translates to "Yes, it can be done" or "We can do it" in English. This statement became a powerful slogan for change and embodied the spirit of solidarity and collective action. Chavez, alongside Dolores Huerta and the United Farm Workers, organized boycotts against the conditions of migrant laborers in California. This movement, particularly symbolized by the boycott of grapes and lettuce in 1973, aimed to pressure growers into improving conditions for farm workers. Chavez's nonviolent approach drew inspiration from Mahatma Gandhi and paralleled the civil rights philosophies of leaders like Martin Luther King, Jr.
The phrase "Si se puede" rallied individuals to believe in the possibility of change through unity and perseverance. It has since transcended its original context to inspire movements for social justice around the world, marking a significant moment in the history of labor rights in the United States.
In cities, the area in which rain water can seep into the ground is reduced. Water flows over roads, then the runoff is carried out to sea through drainage systems. How does the runoff from cities affect ocean systems?
A.
Ocean systems are damaged with the loss of sediments.
B.
Ocean systems are damaged with more pollutants.
C.
Ocean systems are improved by receiving more water.
D.
Ocean systems are improved by the addition of nutrients.
Answer:
The answer could be either A or B for sure.
Explanation:
Answer:
B. Ocean systems are damaged with more pollutants.
Explanation:
That was the answer on study island :/
The picture below shows a common human activity
What are examples this kind of pollution may cause?
A acid rain, which may cause diseases such as asthma
B global warming, which may cause diseases such as skin cancer
C respiratory diseases such as emphysema
D artificial eutrophication, harming aquatic animals
The correct answer related to the examples of pollution caused by this activity is D. Artificial eutrophication, harming aquatic animals
The picture shows a person applying inorganic fertilizer to a field, which is a common human activity related to agriculture. This activity can lead to environmental pollution, particularly in the form of nutrient pollution.
Artificial eutrophication occurs when excess nutrients, often from fertilizers, enter water bodies such as rivers, lakes, and ponds. These nutrients, primarily nitrogen and phosphorus, can cause an overgrowth of algae and other aquatic plants, leading to water quality issues and harm to aquatic animals.
This process can deplete oxygen levels in the water, leading to fish kills and other negative impacts on aquatic ecosystems.
The photograph below shows cell division in plant. The offspring cell will divide a second time. Do you think the photograph shows mitosis or meiosis?
Answer:mitosis if i am wrong i beg forgiveness i have moved on way past this area
Which of these best completes the statement about the interaction of the respiratory system with the circulatory system? The lungs add - whaaaaaa? T^T
I don't see options to complete the sentence, so I will try my best to explain.
Respiration is the process of gas exchange between the lungs and the environment. The lungs pick up O2 from the environment during inspiration, and expel CO2 during expiration.
External Respiration is the gas exchange between the lungs and the blood.
- In the alveoli of the lungs, blood flows past during pulmonary circulation and through the process of diffusion, CO2 from the blood enters the alveoli and O2 from the alveoli enters the deoxygenated blood.
Internal Respiration is the gas exchange between the blood and the cells of the body.
- After picking up the O2 from the alveoli in the lungs, the newly oxygenated blood flows around the body and, through diffusion, sends the O2 to the body cells, and picks up the CO2, thus becoming deoxygenated.
Why do we need Oxygen to survive???
- Oxygen serves as the final electron acceptor in the electron transport chain of cellular respiration!
Answer:
oxygen to the blood
in what three ways are human traits controlled?
They are controlled by single gene with two alleles and other single jeans with multiple alleles
Final answer:
Human traits are controlled by polygenic inheritance, nature-nurture interactions, and natural selection, with factors ranging from multiple gene influences to environmental pressures shaping phenotypic diversity.
Explanation:
Human traits are controlled in three primary ways. Firstly, most traits are polygenic, being influenced by more than one gene, examples include height, skin color, and weight. Secondly, nature-nurture interactions play a significant role; for instance, a person may have a genetic predisposition for height, but environmental factors like nutrition can influence their actual growth. Lastly, natural selection can impact traits over generations, particularly in how phenotypes distribute within a population due to selective pressures from the environment. For example, some traits like skin color or lactase persistence have evolved due to environmental selection pressures.
Imagine that muskrats are removed from wetland ecosystem predict what would happen both to producers and to secondary consumers..
producers will increase because a predator will be going away but consumers will decrease because teritary consumers will have to eat
If muskrats were removed from a wetland ecosystem, it would disrupt the balance. The primary consumers' populations could increase, leading to overconsumption of producers and possibly a reduction in biodiversity which cascades to other levels of the food web. The ecosystem might recover over time, however, the state may differ from the original.
Explanation:Removing muskrats from a wetland ecosystem would likely disrupt the equilibrium of the ecosystem. As muskrats, which are secondary consumers, are removed, there will be a change in the population of the species they prey on, which are often primary consumers such as insects and mollusks. These primary consumers could increase in number, potentially leading to overgrazing or overconsumption of the producers (plants and algae).
In turn, this can lead to a decrease in the amount of producers, which would also affect other animals in the ecosystem that rely on these resources. This ripple effect might cause a drastic decrease in biodiversity and could cause irreversible damage to the ecosystem, leading to potential collapse of the entire food web.
The loss of primary producers would initially lead to a disruption in the food web, however, nature has a way of adapting to changes over time and the ecosystem could recover, although it might not be in the same state as before.
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What is a green plant supported by so it can stand up? water osmotic pressure cell walls
A turgid plant cell contains more water and minerals in solution than flaccid (deflated) plant cells and exerts a greater osmotic pressure on its cell membrane and walls. So, turgor is a force exerted outward on a plant cell by the water contained within the sturdy cell wall.
if a scientist were to study the organisms in your ecosystem what questions might they ask
Answer:
I would write a question about relationships between predators and prey of a given ecosystem.
Explanation:
An example question is:
a.) "Draw a predator-prey graph that shows the relationship between lions and zebras."
b.) "Explain the trends of the above graph with regard to increase and decrease of the prey of predators."
I hope that made sense :)
Good luck.
Answer:
He could ask questions related to the eating habits of these organisms, if they have nocturnal or daytime habits and if it is a predator and what are their predators.
Explanation:
In an ecosystem, a scientist is able to observe countless different organisms. These organisms can trigger a scientist's curiosity, causing him to pose some questions about the species he doesn't know.
In relation to animals, the scientist may ask:
Does this species have a nocturnal or diurnal habit? Is it a carnivore or herbivore? Is it a predator? What are your prey? What are your predators? Is this a monogamous species? How does it reproduce? Is it a native species?A group of cells that have the same function is called a(n) .
Answer:
Tissue
Explanation:
Suppose you have made the following hypothesis:
The greater the height from which you drop a ball, the faster the ball will be traveling when it hits the ground because gravity has more time to speed it up.
If you observed that two identical balls, dropped from the same height, each reached the ground with a speed of 3 m/s, does that evidence support the hypothesis?
A. Yes, the evidence supports the hypothesis.
B. No, the evidence contradicts the hypothesis.
C. The evidence is not related to the hypothesis.
Answer:
maybe c
Explanation:
I hope this helps
Answer:
The correct answer is option C. the evidence is not related to the hypothesis.
Explanation:
The given experiment is not related to the hypothesis as the hypothesis is that with the increase in the height the speed of traveling of ball increases due to gravity. According to the hypothesis the gravity has more time to speed the ball.
The given experiment has no independent variable that can explain or test the effect of gravity on the balls because both balls dropped from the same height.
Thus, the correct answer is option C. the evidence is not related to the hypothesis.
HELP ME WITH THIS 60 POINTS,5-STAR RATING, AN THANKS AND MARKED AS BRANLIEST.
Robert was told by a friend that if you place unused batteries in a refrigerator, they would last longer.He wanted to see is this was true.He hypothesized that if the temperature is colder, then the battery power would last longer. Robert brought some batteries. He placed 1 of them in the refrigerator,1 on his desk, and 1 on a heating pod.One week later, Robert tested 3 batteries with a battery tester.He repeated the test 3 more times for a total of 4 weeks. He used the same size batteries.
Independed Variable:
dependent variable:
constants:
control:
Answer:
Independent Variable:
Batteries
Dependent variable:
Batteries After Used
Constants:
Refrigerator, Heating Pod, and Desk
Control:
Temperature of Heating Pod, Refrigerator, and room of which desk is in.
Answer:
Independent Variable = Batteries
Dependent variable = Batteries After Used
Constants = Refrigerator, Heating Pod, and Desk
Control = Temperature of Heating Pod, Refrigerator, and room of which desk is in.
~batmans wife dun dun dun....
Which level of the energy pyramid has the least amount of energy available?
the highest level which is the 'apex preditor' or in other cases its called a 'tertiary consumer'
Answer:
needed help w this too
Explanation:
thanks
Anyone have the answer???????????
Answer:
Metaphase
Explanation:
During metaphase, the chromosomes align at the center of the cell
During the metaphors
which lists tupes of materials from most conductive least conductive
Which is a function of the hormones secreted by the pancreas?
a they regulate blood levels of glucose.
b They maintain water and salt balance.
c They stimulate the pituitary gland.
d They regulate blood levels of calcium.
Answer: The answer is A. They regulate blood levels of glucose.
Explanation:
Pancreas: insulin- reduces blood-glucose levels; glucagon- increases blood-glucose levels
Answer:
The correct answer is letter A. They regulate blood levels of glucose
Explanation:
Pancreas secrete a kind of hormony called insulin. This sort of hormony regulates the levels of glucose in the whole body. It is important for us. When we have a problem inside pancreas and this organ can't secrete the insulin anymore, a disease appears in our body called diabetes. The levels of glucose in our body starts to increase and people that have this kind of disease need to take insulin injection.
why has the united states not signed the kyoto protocol
Answer:
In July 1997, the Senate unanimously passed a resolution (S. Res. 98) stating that it would not ratify any global climate treaty that would seriously harm the U.S. economy or that failed to require developing countries to reduce their emissions within the same time frame as the developed countries.
Explanation:
Matthew decided he wanted to hike up Mount Everest. On his way to the top, it began to snow and the temperature dropped to -10°F. Matthew forgot to wear a heavy jacket so his body began to shiver beyond control. In this case, Matthew's body shivering is the ________ to a drop in temperature.
A) input
B) stimuli
C) response
D) environmental condition
Answer:
C
Explanation:
Due to him being cold, his RESPONSE is to shiver.
C shivering is a RESPONSE of the body when it goes below its normal temperature. Shivering helps the body move blood around your organs to help you warm up
When a device is used in a circuit in which the voltage is 81 V, the current flowing through the device is 3 A. What is the resistance of the device?
Answer:
The resistance of the device is 27Ω
Explanation:
When a device is used in a circuit in which the voltage is 81 V, the current flowing through the device is 3 A.
In order to calculate the resistance of the device, we know that the resistance is directly proportional to the voltage in the terminals of the device and the current flowing through it.
Using Ohm's law
[tex]R=\frac{V}{I} \\R=\frac{81V}{3A}=27[/tex]Ω
*blank* harvesters have replaced hand labor in many agricultural fields
do we have options? can't help without options.
Mechanical harvesters have increasingly replaced human labor in agriculture due to factors like labor shortages and the drive to reduce costs and increase efficiency. This is part of a larger trend in mechanization driven by technological advancements and environmental considerations, as machinery becomes more capable of performing complex tasks and reducing waste.
Mechanical harvesters have replaced hand labor in many agricultural fields, signaling a major shift in how agriculture is approached. The introduction of mechanization in farming practices has allowed for significant advancements in productivity and efficiency. In regions like California, farmers are investing in sophisticated machinery capable of handling even delicate tasks such as fruit harvesting that were previously done by hand. This transition is driven by various factors, including labor shortages caused by changes in migration patterns and economic conditions, as well as the inherent capitalist motivation to reduce costs and improve profits.
The evolution of agriculture has often been in step with technological advancements. Large-scale, efficient farm machinery like tractors, cultivators, and combine harvesters have replaced many manual farming activities, drastically reducing the number of people required to operate a farm. Over time, the need for human labor on farms has decreased, particularly in high-income countries such as the United States. However, as labor costs rise, so does the incentive to automate, which underscores the capitalist drive to innovate and maximize profit margins.
In addition to labor-saving motivations, environmental concerns also play a role in agricultural mechanization. The use of fossil fuels has led to an increase in greenhouse gas emissions, and there is a growing focus on renewable energy sources and more efficient use of biomass. The farm equipment manufacturing industry has evolved accordingly, producing machines that not only harvest crops but also manage post-harvest handling, aiming to exploit every part of the crop and minimize waste.
PLEASE HELP THIS IS MY FINAL , AND BEING TIMED!!
Which statement best describes a characteristic of maritime polar air masses?
A-They occur mostly during the summer.
B-They form over water with cool, moist air.
C-They bring dense, heavy snow in the winter.
D-They have cool, dry air that forms over land.
Answer:
B. They form over water with cool, moist air.
Explanation:
The maritime polar air masses are large bodies of air and humidity originate as a continental air masses collecting moisture, cold and warmth from the ocean.
it is denoted by the acronym mP this large bodies forms over the Pacific Sea and the northern Atlantic Sea, it tends to be unstable carry with them cool moist and heavy rains reaching the continents.
After chlorofluorocarbons were banned, which class of chemicals was used in their place?
Answer:
The correct answer would be fluorinated compounds and HFCs.
Explanation:
Chlorofluorocarbons or CFCs are halocarbons that contain molecules of chlorine, fluorine, and carbon. These chemicals were heavily used in sprays, packaging materials and refrigerators. CFCs cause depletion in stratospheric ozone.
Due of their harmful effects on ozone layer, chlorofluorocarbons have been banned since 1996. After the banning of chlorofluorocarbons, hydroflurocarbons (HFCs) and fluorinated compounds are in used in place of CFCs as they do not deplete stratospheric ozone as much CFCs does, and do not contain chlorine.
Thus, the correct answer would be fluorinated compounds.
Chlorofluorocarbons (CFCs) were replaced by hydrochlorofluorocarbons (HCFCs) and hydrofluorocarbons (HFCs) after they were banned due to their harmful effects on the ozone layer. These replacements are still used in aerosols and refrigerants but are less damaging to the ozone.
Explanation:After the ban on chlorofluorocarbons (CFCs) due to their damaging effects on the stratospheric ozone layer, hydrochlorofluorocarbons (HCFCs) and hydrofluorocarbons (HFCs) have been widely adopted as replacements. These chemicals were still used as aerosol propellants and refrigerants, like CFCs, but were designed to be less harmful to the ozone layer. HCFCs and HFCs, although better for the ozone layer, still hold global warming potential and contribute to the broader issue of climate change. Consequently, there is ongoing research and development to find alternative chemicals that have minimal environmental impacts.
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What is the smallest unit of organization in an ecosystem? Give one example from the diagram.
Answer: The Cells
Explanation: Cells are the smallest living organism in an ecosystem
The cell is the smallest unit of organization in an ecosystem.
What is a cell?The cell function of an animal cell is to perform like a hormone and engage production of energy for the cells
The cell function of a plant cell is to carry out all of the functions necessary for survival.
Animal cells are eukaryotic cells which are surrounded by a plasma membrane. It contains the nucleus and the organelles that are membrane-bound.
Thus,The cell is the smallest unit of organization in an ecosystem.
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Which is a component of the biosphere?
Answer:
There are basically 4 components of Biosphere.
Explanation:
Biosphere is the collection of all ecosystems on earth and their interactions with each other. The Biosphere of earth consists the following components,
1. The Biota
All the living organisms including animals, plants, insects and bacteria is called the Biota.
2. Geosphere
Geosphere is the surface of biosphere that is composed of soil, rocks, mountains etc.
3. Hydrosphere
The hydrosphere includes all the water bodies like ocean, rivers, streams and lakes.
4. Atmosphere
Atmosphere is the climate that describes about the temperature, humidity, wind and rain fall in Biosphere.
Unicellular Protozoa
Uni/multicellular
algae
Multicellular
heterotroph
cell walls chitin
Multiceullular
autotroph
cell walls
of cellulose
Multicellular
heterotroph
Lack cell walls
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What domain name should replace the question mark in this chart?
Archaea
Bacteria
Eukarya
Monera
Answer:
eukaria
Explanation:
it is a biological taxonomy that includes all you said in your question
If a scientist is studying the attraction of water molecules to each other, what property is he or she studying
The scientist is studying cohesion, a property of water that makes water molecules attract to one another.
Answer:
Cohesion
Explanation:
Cohesion refers to one of the properties of water molecules to get attracted to each other. Since each water molecule an oxygen atom with a partial negative charge and hydrogen atoms with a partial positive charge, water molecules form intermolecular hydrogen bonds. This leads to the tendency of water molecules to stick together, that is, cohesion.
What’s the answer because I really don’t know
Answer: C
Explanation In any of the answer choices doesn't say tat its possible copper to conduct electricity. But in C its says it can exchange electricity.