Answers
Answer:
RNA was the first molecule of heredity before DNA came onto the scene.
Related Questions
How would a 3D model of glucose differ from the formula model? (1 point)
A) A 3D model shows how the different atoms are arranged, but the formula model does not.
B) A formula model shows which atoms are larger but the 3D model does not.
C) A 3D model shows the number of each type of atom, but the formula model does not
D) A formula model shows size of the glucose molecule, but the 3D model does not.
Answers
In chemistry, a formula indicates the type and number of atoms in the molecule. On the other hand, a three-dimensional (3D) model is a graphic representation that shows how atoms are arranged in the molecule.
A 3D model shows how the different atoms are arranged, but the formula model does not (Option A).In a chemical formula, each element of the molecule is represented by its chemical symbol, and the number of atoms is indicated by a subscript.In this case, the formula of the glucose molecule is C₆H₁₂O₆A 3D molecular model shows the shape of the molecule in specific conditions such as, for example, physiological conditions (pH 7.2).The 3D molecular models are influenced by the spatial orientation of covalent bonds between atoms.In conclusion, a 3D model shows how the different atoms are arranged, but the formula model does not (Option A).
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wich of the following ingredients produce a heterogeneous mixture when mixed together ?
a.oil and water
b.sugar and water
c.salt and vinegar
d.molten copper and zinc
Answers
Answer:
the answer is A
oil and water
Forested floodplain wetlands benefit from periodic flooding from rivers. When floodwaters spill into the wetland, they bring water and nutrients and leave both behind. But humans have often cut off floodplains from rivers by building roads, levees, berms, etc. Think about what would happen if a river could no longer flood into these areas. How would the resulting increased amount of water and nutrients in the river affect soils, hydrology, and life downstream?
Answers
The absence of flooding from rivers into forested floodplain wetlands would lead to adverse effects on soils, hydrology, and the overall biodiversity downstream, emphasizing the importance of maintaining the natural connection between rivers and floodplains for the health and functioning of these ecosystems.
If a river can no longer flood into forested floodplain wetlands due to human interventions, it would have significant consequences for the downstream areas in terms of soils, hydrology, and life.Without periodic flooding, the increased amount of water and nutrients in the river would not be able to disperse and be deposited in the floodplain wetlands. As a result, downstream soils would experience a decrease in nutrient inputs, leading to decreased fertility and altered composition. The absence of regular flooding would disrupt the natural hydrological cycle, reducing the recharge of groundwater and altering the flow patterns in the river system. This could result in decreased water availability, increased erosion, and changes in the overall ecosystem dynamics downstream.The disruption of nutrient flows and hydrological patterns would also have a significant impact on the life forms downstream. Aquatic plants, fish, and other organisms that depend on floodplain wetlands for breeding, feeding, and shelter would face habitat loss and reduced food availability. This, in turn, could disrupt the food chain and impact the abundance and diversity of aquatic and terrestrial species in the downstream areas.The absence of flooding from rivers into forested floodplain wetlands would lead to adverse effects on soils, hydrology, and the overall biodiversity downstream, emphasizing the importance of maintaining the natural connection between rivers and floodplains for the health and functioning of these ecosystems.For more such questions on flooding
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Which sex would you expect to be the choosiest?
Answers
Answer:
Feamles but it depends what they're choosing from
Explanation:
different parasite stages found in trypanosome Cruz but not found in plasmodium vivax
Answers
Stages that are found in trypanosome Cruz but not found in plasmodium vivax are epimastigote stage and amastigote stage
What do you mean by epimastigote stage?
This is an intermediate stage found in the insect vector of Trypanosoma cruzi. Epimastigotes are elongated cells with flagella that multiply by binary fission.
Therefore, Stages that are found in trypanosome Cruz but not found in plasmodium vivax are epimastigote stage and amastigote stage
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Which of the following best matches a part of a living cell with the function it performs?
Cytoplasm: green structure inside plant cells
Nucleus: green structure inside plant cells
Cytoplasm: directs all of the cell's activities
Nucleus: directs all of the cell's activities
Answers
Answer:
Nucleus: directs all of the cells activities
=~
Explanation:
I took the exam and its correct!! I take FLVS this is the 4.00 Pretest or 4.01 for science right? Any who I got it right so go get em babes!!
What type of system is required to maintain the amount of sugar in the blood at a certain level, making sure it does not rise too high or fall too low?
A.one negative and one positive feedback loop
B.two positive feedback loops
C.one negative feedback loop
D.two negative feedback loops
Answers
Answer:
Explanation:
C. one negative feedback loop
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Which of the following organisms are most important in biodegradation
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Answer:
2.1.
In the environmental context, generally microorganisms are the most important agents of biodegradation. Although extensive degradation of some xenobiotic chemicals can occur in mammals (usually in the liver), they are not particularly important in degradation of environmental pollutants.
Explanation:
Sponges lack which of the following:-definite symmetry -bilateral symmetry-mirror image-no body cavity
Answers
Sponges are members of the Phylum Porifera. They are basic animal consisting of many cells. They are described as lacking with true tissue or no body symmetry. Sponges are unsymmetrical or without body plan symmetry.
Answer - Sponges lack definite symmetry
In which of these does a chemical change take place?
mixture
compound
solution
none of the above
Answers
Look at the following diagram of the carbon cycle. An image of carbon cycle is shown. The sun, a cloud, two trees, one on the left and the other on the right, an animal, lake, and a factory are shown in the image. An arrow is shown from the sun towards the left tree marked A. The sun is marked B. There is an arrow from the air above the clouds, marked C, towards the left tree. An arrow from a location close to the ground marked D points towards Dead Organisms, which is a label under the animal. An arrow marked E points from the right tree straight up to the clouds. An arrow marked F points from the animal straight up to the clouds. An arrow marked G points from the factory towards the air above the clouds, C. There is an arrow pointing from the air to the lake labeled Carbonates in Water, an arrow pointing down from dead organisms to Fossils and Fossil Fuels, and an arrow from Fossils to the factory. Which of the following facts is best represented by the arrows pointing down from F? The energy stored in atmospheric carbon dioxide is conserved because it is transformed to energy present in decomposed plants. The energy consumed by animals in the form of glucose is conserved because it is used to create new forms of energy present in decomposed animals. The energy stored in decomposed plants and animals is conserved because it is used to create new forms of energy present in decomposed plants and animals. The energy stored in decomposed plants and animals is conserved because it is converted into chemical energy present in fossil fuels.
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None of the above facts is best represented by the arrows pointing down from F. The arrow pointing down from Dead Organisms to Fossils and Fossil Fuels represents the fact that the organic matter from dead organisms can be transformed into fossil fuels over millions .
What is an Organism ?An organism is any living entity that can carry out the basic functions of life such as reproduction, growth, and adaptation to its environment. This can range from a single-celled bacteria to complex multicellular organisms such as plants, animals, and humans. Organisms can exist in different ecosystems and can interact with each other to form communities and food webs.
What is a multicellular ?Multicellular organisms are organisms that consist of more than one cell, in contrast to unicellular organisms that consist of a single cell. Multicellular organisms can range in size from microscopic to large and complex, such as humans and other animals, plants, and fungi. The cells of multicellular organisms are specialized to perform different functions, and they work together to form tissues, organs, and organ systems that carry out specific functions within the organism.
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please help answer these 3! 50 points
Answers
Answer:
it may affect the animals and other tree's.
Explanation:
it may affect animals because since it is a new tree, you might not know that it may be harmful for some animals, like maybe the berries the produce are poisonous or fruits some animals are forbidden to eat. this may be a problem because some animals may accidentally eat that fruit and possibly be injured or die.
trees need sunlight and food, if another tree hopes in suddenly there would be more competition for sunlight and water, there may also be not enough water and sunlight for all the trees to share. this is a problem because if the trees can't get enough sunlight and water, they would die and this leads to a broken home for the animals living in that tree.
Answer:
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How do thermouses know whether or not to keep food hot or cold?
Answers
Answer:
A thermos keeps cold things cold in the same way. It doesn't contain some kind of cooling device. The same vacuum that keeps hot things hot keeps cold things cold. Heat that might otherwise transfer to the cold contents of the thermos is prevented from reaching it because of the vacuum between the thermos walls.
Today's thermoses are constructed much more sturdily than those in the past. The first thermoses featured metal exteriors with glass interior walls. These thermoses often ended up getting broken when accidentally dropped.
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3. The diagram below shows how proteins are assembled by ribosomes. A substance called tRNA delivers molecules, and a substance called mRNA provides the ribosome with the sequence in which the molecules should be connected in order to build each protein.
a) Based on your knowledge of protein synthesis, what type of molecule is labeled "X" in the diagram? (2 points)
(X)-0-0 l l
(Ribosome)-GCA
CGUAAUGCGUCGU-(mRNA)CAGU
Answers
Answer:
RNA
Explanation:
Most genes contain the information needed to make functional molecules called proteins. (A few genes produce regulatory molecules that help the cell assemble proteins.) The journey from gene to protein is complex and tightly controlled within each cell. It consists of two major steps: transcription and translation. Together, transcription and translation are known as gene expression.
During the process of transcription, the information stored in a gene's DNA is passed to a similar molecule called RNA (ribonucleic acid) in the cell nucleus. Both RNA and DNA are made up of a chain of building blocks called nucleotides, but they have slightly different chemical properties. The type of RNA that contains the information for making a protein is called messenger RNA (mRNA) because it carries the information, or message, from the DNA out of the nucleus into the cytoplasm.
Translation, the second step in getting from a gene to a protein, takes place in the cytoplasm. The mRNA interacts with a specialized complex called a ribosome, which "reads" the sequence of mRNA nucleotides. Each sequence of three nucleotides, called a codon, usually codes for one particular amino acid. (Amino acids are the building blocks of proteins.) A type of RNA called transfer RNA (tRNA) assembles the protein, one amino acid at a time. Protein assembly continues until the ribosome encounters a “stop” codon (a sequence of three nucleotides that does not code for an amino acid).
The flow of information from DNA to RNA to proteins is one of the fundamental principles of molecular biology. It is so important that it is sometimes called the “central dogma.”
At any given time, a 4-acre field contains an average of 200 kg dry weight of mallow plants. For these calculations, assume that the food chain shown below is isolated and that there are no other predators or sources of food involved. mallow plant- painted lady butterfly - phoebe- fox Assume that the dry weight of each animal is on average as indicated below Painted lady butterfly 0.1g Phoebe 48 Fox 1 kg (1000 g) a. Assuming that 10% of the biomass, as measured in dry weight, is transferred from one trophic level to the next higher level, calculate how many foxes the field could support at any given time. Show your work and include in your calculations how many phoebes and painted lady butterflies the field could support b. Construct a biomass pyramid diagram depicting the food chain described above. Include only the organisms of the food chain that the 4-acre field will support, and label the trophic level occupied by each organism. The units in your pyramid should be grams per square meter (g/m?) (Note: 1 acre = 4046.86 m).
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a. The 4-acre field will support a total of 200 g foxes at any given time.
b. The pyramid is attached.
How to calculate support for food chain?a. To calculate the number of foxes that the field could support at any given time, we need to work our way up the food chain, starting with the mallow plants:
200 kg of mallow plants x 10% = 20 kg available to painted lady butterflies
20 kg of painted lady butterflies x 10% = 2 kg available to phoebes
2 kg of phoebes x 10% = 0.2 kg available to foxes
Now to convert kg to g to make the calculations easier:
200 kg = 200,000 g of mallow plants
0.1 g per painted lady butterfly x 20 kg of painted lady butterflies = 2000 g = 2 kg
48 g per phoebe x 2 kg of phoebes = 96,000 g = 96 kg
1000 g per fox x 0.2 kg of foxes = 200 g
Therefore, the 4-acre field could support approximately 200 g of foxes at any given time.
b. The biomass pyramid diagram is attached below.
To convert from kg per acre to g per square meter, multiply by a factor of 24.711 (since there are approximately 4046.86 square meters in an acre).
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an ecosystem contains blue whales, sea otters, giant kelp, and various species of phytoplankton. what type of biodiversity is being described?
1. ecosystem diversity
2. species diversity
3. genetic diversity
4. trait diversity
Answers
What is the main cause of a human-created mass extinction?
Answers
Answer:
d
Explanation:
an increase in the human population
What characteristic must physical properties have in order to use them to classify matter
Answers
Answer:
Physical properties are characteristics that describe matter. They include characteristics such as size, shape, color, and mass.
Explanation:
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What causes sandstone to change into metamorphic rock at Stone Mountain?
Answers
Answer:
sandstone experience intense heat and pressure
Explanation:
as streams flow though stone mountain,layers of sand build up.Over time,the layers of sand particles form a sedimentary rock called sandstone.
Circle in red the two genes that are closest together
Answers
i think its c but u go
Answers
Answer:
yeah its c most probable answer
Explanation:
What do organisms contain?
Answers
Answer:
all organisms contain one or multiple cells
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Which phase of cell division is shown?
A) prophase I of meiosis
B) telophase II
C) anaphase II
D) telophase I
Answers
Answer:D
Explanation: Hope it helps
What is the surface of the Earth called?
Crust
Mantel
Inner core
Outer core
Answers
Answer:
crust
Explanation:
when an enzyme can no longer bind to its substrate the enzyme is considerd to be
Answers
Answer:
Denatured
Explanation:
However, extremely high temperatures can cause an enzyme to lose its shape (denature) and stop working. pH: Each enzyme has an optimum pH range. Changing the pH outside of this range will slow enzyme activity. Extreme pH values can cause enzymes to denature.
Is crick and Watson a type of genetic test
Answers
No, "Crick and Watson" is not a type of genetic test. Crick and Watson refer to James D. Watson and Francis Crick, who were scientists involved in the discovery of the structure of DNA. They proposed the double-helix structure of DNA in 1953, which provided the foundation for understanding genetic information and its role in heredity.
Genetic tests, on the other hand, are laboratory tests that analyze an individual's DNA or genes to provide information about their genetic makeup, potential genetic disorders, or predispositions to certain conditions.
These tests can be used for various purposes, such as diagnosing genetic disorders, predicting the risk of developing certain diseases, determining carrier status for genetic conditions, or providing ancestry and genealogical information.
While Crick and Watson made significant contributions to the field of genetics, they are not directly associated with genetic testing. Genetic tests are based on scientific advancements and technologies developed after their groundbreaking discovery of the DNA structure.
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A scientific hypothesis is what?A is an educated guess: an explanation that can be tested by experiment or observation.B is a broad idea that has been tested many times and is widely accepted among scientists.
Answers
A scientific hypothesis is a constructed idea that scientists build up considering multiple evidence or observations, but it hasn't been proven yet, as stated at the first answer option: "is an educated guess: an explanation that can be tested by experiment or observation". On the other hand, theories, more related to the second statement, are ideas that have been tested before or supported on multiple occasions by the scientific community. So the answer is A.
Explanation is edge 2022
define flower gardening
Answers
Explanation:
Answer:
the act whereby flowers are grown and displayed on a garden. it can also be called floral gardening.
What is the phenotype for the female mouse
Answers
Answer:
Behavior, biological features, color, form, and size are a few examples of visible traits.
Explanation:
All of an organism's observable traits, or phenotype, are the outcome of the interplay between its genotype (total genetic inheritance) and environment.
Which of the following is a test forensic scientists might use for chemical analysis?
Size of insect
O Color pattern on insect
Range map of insect
DNA extracted from crop
Answers
This kind of chemical analysis can be carried out using spectroscopy of atomic absorption and plasma-atom inductively coupled emission spectroscopy.
In the simplest words, what is spectroscopy?Spectroscopy is the study about how light and also other types of electromagnetic radiation are taken and emitted by materials. In a manner similar to how a prism divides light it into rainbow of colors, it entails splitting light (or more accurately, electromagnetic phenomena) into its individual wavelengths (a spectrum).
What is the spectroscopic principle?The fundamental idea behind all absorption spectroscopy is to expose a sample to an electromagnetic field and then see how it reacts. Typically, the response is measured in relation to the radiation wavelength.
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Answer: CROP (DNA extracted from crop)
Explanation: "... when insects eat a specific food source, such as flesh, plant matter, or blood, they store this in their crop. By grinding the larva or adult insect up into a slurry, forensic scientists can analyze the composition of the food in the crop for chemicals and even DNA."