Answer:
It's a Chromatid.
Explanation:
Hope my answer has helped you!
Why does the oxygen atom in a water molecule have a negative charge?
A.
Hydrogen bonding pulls electrons toward oxygen.
B.
Water is made of two ionic bonds.
C.
Oxygen attracts electrons more strongly than hydrogen does.
D.
Water is a nonpolar molecule.
Answer: C
Explanation: Oxygen has negative ions.
The oxygen atom in a water molecule have a negative charge form because of Oxygen attracts electrons more strongly than hydrogen does Option(c) is correct.
What is Molecule?Molecule is known to be as the part or group of the atoms which are bond together denoting a smallest fundamental unit merely of a chemical compound.
The oxygen atom has negative charges because for gaining stability oxygen item will accept two electrons Oxygen are known to be as the negative ions over a period of the time and it attracts electrons more strongly.
Therefore Option(c) is correct.
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which steps are part of the process during the formation of molded fossils
Answer:
1.- Mineralization
1.1 Recrystallization
1.2 Epigenization
2.- Carbonization
3.- Casting and Molds
3.1 Exterior
3.2 Interior
3.3 Against mold
Explanation:
The fossils, somatofossil, icnofossil, are formed after the remains of the body is buried. There are three forms of preservation, mineralization, smelting and molding and carbonization that preserve the remains for millions of years.
1.- Mineralization
They are processes in which bones and ichnofossils are formed. The remains of the body receive an addition of minerals or an alteration of the original minerals existing in the bone, which end up turning the remains practically into rock, with which it is known by petrification. Good examples are tree trunks, large bones and shells.
Within the mineralization we highlight two modes of fossilization that you can see below.
1.1 Recrystallization
The original organism is not preserved in its original material, the bone, for example, which is mostly replaced by some other mineral and the structure or shape of the fossil is partially modified.
1.2 Epigenization
This process is divided into two types.
The first, permineralization, occurs when the original material of the organism undergoes an addition of minerals that penetrate the bone, for example, leaving this petrified and heavier, since in addition to the original material the weight of the minerals added by time.
The other process is known as pseudomorphosis, where the original form of the organism is maintained but its material is completely replaced by another mineral.
2.- Carbonization
It occurs when there is a loss of volatile substances (oxygen, hydrogen and nitrogen mainly), leaving a carbon film. It is more frequent in structures formed of lignin, chitin, cellulose or keratin. This occurs when remains of plants or animals are crushed under a rock.
3.- Casting and Molds
They are negative impressions (it does not represent the organism as it really is, just an inverted mold) or positive (it represents the organism as it really is, that is, a copy), of parts of the organisms or their icnofossils. The molds are formed in 3 types.
3.1 Exterior
Forms a negative impression of the organism, such as the skin of an animal or the surface of a shell. The organism is covered in its outer part by a type of material, such as mud, for example, and its body over time remains the format of the organism in the mud that turns into rock, however for this to occur it is necessary that the remains have some surface with indentations, holes, irregular texture and that is somewhat resistant, so that the material that will form the impression can penetrate there and solidify. See the outer mold of a shell below.
3.2 Interior
Forms an internal impression of the organism, commonly occurs in shells. The mold is negative and is formed when mud or any other material penetrates inside the holes and into the rest of the animal and it ends up curdling. The body decomposes and a mold is left of the inside of the shell or of the organism in question.
3.3 Against mold
It forms a COPY of the original organism, but it is more difficult to produce naturally, since for the counter mold to be made it is necessary that first an internal or external "first mold" of it be made. This mold is filled with some material and would form a copy of the organism that formed the "first mold."
Rainbow trout is non-native to the United States. However, this species is breeding with the native Gila trout. Scientists recently observed that the Gila trout were becoming extinct. What is the cause of their extinction?
A. Climate change
B. Disease
C. Preying
D. Hybridization
Answer: C. Preying
Explanation:
A non-native species is the species which is introduced to a new ecosystem. This species is introduced intentionally or accidentally to a new ecosystem by human beings or they may enter to the ecosystem by their own.
A non-native species can be invasive which means it can compete with the native species for resources like shelter, food and mates.
According to the given situation, the Gila trouts being the native species has been affected by the non-native Rainbow trout. This may be because of the fact that non-native species can be invasive for the native species. As the species is used as mate by the non-native species and they may become the prey of non-native species. This has resulted in the extinction of the species of Gila trouts.
"The correct answer is D. Hybridization. The most accurate answer to the question of why the Gila trout are becoming extinct, given the context of breeding with non-native rainbow trout, is hybridization.
Hybridization occurs when two different species interbreed. In this case, the non-native rainbow trout is breeding with the native Gila trout. This can lead to the dilution of the native species' gene pool, which can result in a loss of genetic diversity and the unique adaptations that allow the native species to thrive in its environment. Over time, if the native species' genetic material is overwhelmed by that of the non-native species, the native species can effectively become extinct as it no longer exists in its original, pure form. This process can also lead to the creation of offspring that are less fit for survival, further threatening the native species' population.
The other options provided do not directly address the scenario described:
A. Climate change can indeed contribute to the decline of species, but the question specifically mentions the breeding of rainbow trout with Gila trout, pointing to hybridization as the direct cause.
B. Disease can also lead to the decline or extinction of species, but again, the question directly attributes the cause to the interbreeding of the two trout species.
C. Preying might affect the population of a species, but it would not lead to the genetic absorption of one species into another, which is the process indicated by the scenario.
Therefore, the most accurate answer to the question of why the Gila trout are becoming extinct, given the context of breeding with non-native rainbow trout, is hybridization."
The periodic table houses noble gas elements in group 18. These elements are highly stable and rarely react with any other elements. What is one possible reason for the stability of the noble gas elements?
A.
They easily form covalent bonds.
B.
The compounds that they form with other elements are very unstable.
C.
Their outermost shell has the maximum number of electrons that it can hold.
D.
They require less activation energy.
i was doing some research and it "b.The compounds that they form with other elements are very unstable."
i hoped this helps a bit but if im wrong please dont report me brainy might remove my account. im trying my best to answer questions correctly
Answer:
Option (C).
Explanation:
Noble gases are included in Group 18 of the modern periodic table. The noble gases are least reactive and most stable elements of the periodic table.
Noble gases has fully filled electronic configuration. Their outermost valence shell electrons are fully filled, they do not lose or gain any electron and neither they share electrons with other element. The maximum electrons are present in their outermost shell that makes the noble gases least reactive and more stable in nature.
Thus, the correct answer is option (C).
Which condition is required for viruses to reproduce
Answer:
B, they must enter the cell of another organism.
Viruses are nonliving, meaning they cannot reproduce with other viruses. It must have a host cell to inject it's DNA into in order to reproduce.
Explanation:
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A science student makes the following statement.
Plant growth is affected by the color of light.
What is the student doing?
Answer:
Collecting data
Explanation:
Answer:
a hypothesis.
Explanation:
The student is considering a hypothesis.
A hypothesis is based on prior knowledge and observation. The statement of the student is something that can be supported or refuted through experimentation or observation for this reason it is a hypothesis. To know the falsifiability and testability the student have to derive predictions from the hypotheses about the results of future experiments, and then performing those experiments to see whether they support the predictions.
what are transitions metals
Answer:
The transition metals are a group of metals that are found in the middle of the periodic table.
Explanation:
Hello There!
Transition metals are generally elements that are hard and strong. These metals both have high melting points and boiling points. Transition metals can conduct heat and electricity well, they can be pulled into wires and they are able to be hammered and bent into different shapes. The atoms in these metals are very attracted to each other. They are also usually shiny
Some examples of transition metals are...
Gold
Silver
Iron
Copper
Titanium
Zinc
Mercury
Nickel
If your blood becomes too concentrated with Iona, what will happen to the red blood cells
Answer:
If the fluid is very concentrated, the cell will lose a lot of water, causing the red blood cell to shrink and die. On the opposite side of things, if the body fluids are too dilute (hypotonic), water will diffuse into the red blood cells (because the inside is more concentrated than the body fluid), causing the cells to burst open.
Some protists can reproduce both sexually and asexually. What's a major advantage of each?
A. Sexual reproduction allows the organism to produce an exact copy of itself, and asexual reproduction can be more rapid. B. Sexual reproduction increases genetic diversity, and asexual reproduction can be more rapid. C. Sexual reproduction is less prone to making genetic mutations, and asexual reproduction increases genetic diversity. D. Sexual reproduction can be more rapid, and asexual reproduction allows the organism to produce an exact copy of itself.
B. Sexual reproduction rises genetic diversity and asexual reproduction is more rapid.
Explanation:Organism such as Protists reproduces through two modes namely sexual and asexual. In former, two parent of different sex are involved in reproduction process whereas in latter single parent is involved. The asexual reproduction mode in Protists includes binary and multiple fission; and budding.
Conjugation and generation alternation are examples of sexual mode of reproduction in Protists. The advantage of having two reproduction modes is that, due to involvement of two parents sexual reproduction increases genetic diversity whereas as asexual reproduction in very simple process it occurs more rapidly.
Select the correct answer from each drop-down menu.
Which phase of mitotic division is the highlighted cell undergoing?
The cell is undergoing , which is the stage before .
Answer:
The answer is Telophase, which is the stage that comes right before cytokinesis.
Explanation:
Telophase of mitotic division is the highlighted cell undergoing
What is Telophase?The process of mitosis, which splits the duplicated genetic material carried in the nucleus of a parent cell into two identical daughter cells, is called telophase.
The complete query missing is given below:
Which phase of mitotic division is the highlighted cell undergoing?
The highlighted cell is undergoing mitotic cell division and is in the telophase of the cycle. At each pole of the cell, a complete set of identical chromosomes is attained during telophase. The spindle disintegrates and vanishes. Around each set of daughter chromosomes, the nuclear membrane begins to develop.
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when dust and ash particles block out sunlight and reduce solar radiation earth experiences the
Answer:
The haze effect
Explanation:
When dust and ash particles block out sunlight and reduce solar radiation earth experiences the haze effect.
An example of internal feedback working to maintain homeostasis is your
A. decreased respiration rate when you are studying
B. decreased heart rate when you are sad
C. increased respiration rate when your muscles need more oxygen
D. increased heart rate when your lungs need more oxygen
When the common cold virus infects a cell, it inserts its genome into the host
genome. The host cells replicate the viral genome, produce new viral particles,
and burst. As the host cells burst, the replicated viral particles are released and
infect neighboring cells.
What cycle of replication is used by the common cold virus?
A. Lysogenic cycle
B. Replication cycle
C. Lytic cycle
D. Dormant cycle
Answer:
C
Explanation:
Lytic cycle of a viral replication results to the damage/lysis of the host cell. The other phase is the lysogenic cycle, where the host cell is not destroyed. In this case, the viral genome replicates with that of the host cell by integrating its DNA with that of the host.
How does xylem differ from phloem?
A. Xylem has living cells.
B. Xylem is found in the roots.
C. Xylem contains chloroplasts.
D. Xylem has a two-way flow.
Answer:
of the answers i believe it to be B
Explanation:
The xylem can be found in either the roots or the leaves and they are dead tissue.
The xylem and phloem are vascular tissues that have an important role in the transport of water and food respectively. Xylem differ from phloem in having chloroplast in xylem cells.
What are vascular tissues made of?Procambium and vascular cambium are two meristematic tissues that lead to the formation of vascular tissues.
Procambial initials derived from apical meristems produce primary xylem and primary phloem during the primary growth of stems and roots.
Xylem cells contain chlorophyll which is absent in phloem cells.
Thus, the correct answer is C.
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Which type of selection leads to increased phenotypic and genetic variation?
Answer:
Its disruptive selection.
Explanation:
Nature selects those variations which can be inherited and makes the survival better so that the individual carrying these useful variations reproduce and form more number of progeny. This effect of natural selection can be stabilizing, directional and disruptive.
Disruptive selection: It is a type of natural selection where mean character value is not preferred but both the peripheral character values are preferred by the nature. For example in a population, if nature selects both the tall and dwarf people but not the medium height people then it is called disruptive selection.
In case of directional selection only one of the extreme character value is selected by the nature. For example in a population, if nature selects only the tall people or only the dwarf people then is is said to be directional.
Stabilizing selection is when nature favors the mean character value i.e. if nature favors or selects the medium sized individuals, then the selection is said to be stabilizing. We get a bell shaped graph for stabilizing selection.
Coquina, a type of limestone, forms from shell fragments that settle on the ocean floor. What type of rock is coquina?
Answer: sedimentary.
Answer:
Sedimentary rock
Explanation:
The Coquina rock is a sedimentary rock that is comprised of broken fragments of the shells of ancient trilobites, invertebrates, and brachiopods. When the sediments were deposited, and shells were also added on it, they have undergone compaction and lithification, as a result of which these rocks were formed. They are generally classified as the soft limestone rocks, that are typically formed in the marine and lacustrine environments, where the flow energy is very high.
Thus, Coquina is a sedimentary limestone rock.
the pH of our blood is strictly maintained between 7.3 and 7.5 by a
A Acid
B base
c proton
d buffer
e salt
The pH of our blood is strictly maintained between 7.3 and 7.5 by a buffer (D)
Further explanation
pH stands for potential of Hydrogen. It is the number of hydrogen ions in a solution. pH is important for our body to survive and keep its function. The pH level is a measure of acidity or alkalinity, on a scale of zero to fourteen. Zero is the most acid, while fourteen is the most alkaline.
The most critical pH balance is in the blood. The most important pH level that the body must regulate is the blood’s pH between 7.3 and 7.5. The lungs and kidneys play a key role in this maintenance process. The lungs maintain this pH balance by releasing carbon dioxide. The kidney helps the lungs maintain the acid-base balance by excreting acids or bases into the blood.
When the lungs or kidneys are malfunctioning, blood’s pH level can become imbalanced. It means that the pH is outside that range. This condition can lead to medical conditions such as acidosis and alkalosis. Both conditions require treatment from a medical professional, not simply dietary changes.
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Keywords: pH balanced, pH imbalance, neutral pH, acid, alkaline, metabolism
Which medical conditions are associated with large amounts of fat and sugar in your diet? Check all that apply.
A- diabetes
B- color blindness
C-heart disease
D- obesity
E- sickle cell anemia
Answer:
A- diabetes
C-heart disease
D- obesity
Explanation:
Diabetes, heart disease, and obesity are medical conditions associated with large amounts of fat and sugar in your diet.
HELP A SISTER OUT PLEASE!!!!Explain why scientist say that decomposers can be founded anywhere on an energy pyramid
Answer:
because everything is decomposed
Explanation:
everything must be decomposed in order for the cycle to begin again
Decomposers are found at every level of an energy pyramid because they process organic matter from all trophic levels, recycling nutrients and energy, and supporting ecosystem stability.
Scientists say that decomposers can be found at any level of an energy pyramid because they play a crucial role in breaking down organic matter from all trophic levels. Decomposers such as fungi, bacteria, and worms (detritivores) consume dead organisms and other organic waste, releasing energy and nutrients back into the ecosystem, which are then used by producers to create new organic compounds. Without decomposers, dead matter and wastes would accumulate, preventing the recycling of nutrients, and ultimately destabilizing the ecosystem.
Energy pyramids illustrate that as energy flows from producers to various levels of consumers, it is diminished at each level due to the inefficiency of energy transfer and loss as heat. However, decomposers are not restricted to a single level because they recycle nutrients from organic matter at all levels. This continuous recycling is critical because the ecosystem depends on the reintroduction of these nutrients for the survival of producers and, consequently, all other trophic levels.
Storing raw food requiring a higher cooking temperature below or away from food requiring a lower cooking temperature helps prevent which type of contamination?
Answer:
Biological
Explanation:
Storing food requiring a higher cooking temperature, this temperature pasteurizes the food that kills the bacteria inside it, and low temperature stops their growth. So, such biological contamination is seized by temperature variations.
This is about understanding types of food contamination.
Biological Contamination
Contamination of food simply means the process of making food impure by pollution or through poisoning. There are three main types of food contamination namely; Biological, Physical, Chemical Contamination. However, the only one that applies to this question is biological contamination as will be explained below.Biological Contamination; This type of contamination occurs when food is contaminated by living organisms or their produces. Examples of these include bacteria, virus, dust e.t.c. The way to eliminate these biological contaminants is by storing those foods that require higher cooking temperatures because the temperature will ensure that it pasteurizes the food and that will make the biological contaminants inside it to die. Also, when the temperature is low, they stop growing. Hence the reason for storing it away at lower temperatures.
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Which is an example of a vestigial structure?
A. Tail of a monkey
B. Fin of a fish
C. Flower of a plant
D. Tailbone of a human
Answer:
D
Explanation:
A vestigial structure is a structure that was helpful to an ancestor, but not helpful anymore.
A. Monkeys still have tails :/
B. Fishes still have fins :/
C. Some plants still have flowers :/
D. Humans don't have tails the last time I checked.
Which of the following would most likely be key to gathering evidence that the RNA World hypothesis is valid?
Creation of suitable environments for long-term study of single-celled organisms
Simulation of early Earth conditions and long-term study of the resulting molecules
Development of a system for studying the microsphere's ability to absorb additional molecules
Categorization of the different specific conditions that result in the development of microspheres
Answer:
The answer is; Simulation of early Earth conditions and long-term study of the resulting molecules
Explanation:
It is believed that the first molecules on earth were made spontaneously through reaction spurred by energy from lightning and also the heat from the earth. It is believed that these molecules over time then formed polymers through the catalysis by metals in the oceans. These polymers were able to self-replicate and also act as enzymes since they were able to fold up. This hypothesis was coined by Carl Woese, Francis Crick and Leslie Orgel in the 1960s. To prove it, the then conditions of early earth need to be replicated, data collected, and analyzed.
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Answer:
Simulation of early Earth conditions and long-term study of the resulting molecules
Explanation:
A researcher was studying mutations in bacteria. He found that certain bacteria had changes in their DNA that allowed them to be resistant to antibiotics. This research is an example of . The mutation will lead to .
Answer:
The research is an example of evolutionary genetics and the mutation will result in fewer bacteria becoming resistant to the particular antibiotics.
Explanation:
A branch of science that comprises the study of genetic changes, which results in evolutionary modifications in organisms is known as evolution genetics. As certain bacteria had modified their DNA and had resulted in the development of antibiotic resistance.
Because of antibiotic resistance, some bacteria in which modifications in the DNA has occurred became resistant against certain kind of antibiotics and those antibiotics are no longer efficient in killing or preventing their growth.
Answer:
A researcher was studying mutations in bacteria. He found that certain bacteria had changes in their DNA that allowed them to be resistant to antibiotics. This research is an example of evolutionary genetics . The mutation will lead to all the bacteria becoming resistant to the specific antibiotics
Explanation:
PLATO answer
what do bacteria have in common with cells of other living organisms?
a. no water
b. all the same size
c.contain paramecium
d.contain cytoplasm
how are meiosis and mitosis different
To take a whiff of your favorite food, you use both?
A. motor nerves and your digestive system
B. sensory nerves and your immune system
C. motor nerves and your skeletal system
D. sensory nerves and your respiratory system
Answer:
the answer would be d as you are using you nose to inhale the smell of food which then is activating you sensory nerves
Explanation:
out of hypothesis,theory and law, which ocurrs before the experiment is completed?
Answer: (Hypothesis)
(Basically before you complete a scientific experience you want to create or make a guess on what the outcome result is gonna end up as. A hypothesis is basically a wild guess or a estimate of what YOU think the outcome result is gonna be)
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Where are centrioles found
Centrioles are tiny structures found in most eukaryotic cells, located near the nuclear envelope in the region known as the centrosome. The centrioles play a key role in cellular division.
Explanation:Centrioles are tiny cylindrical structures found in most eukaryotic cells, excluding most plant cells. They are located in the cell's cytoplasm, near the nuclear envelope, in a region referred to as the centrosome. Centrioles are made up of clusters of microtubules arranged in a specific pattern and play a crucial role in cellular division where they can organize the formation of the spindle fibers that separate chromosomes during cell division.
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Is the only metal that is not solid at room temperature.
Steel
Aluminum
Copper
Mercury
Answer:
I believe it's Mercury.
Explanation:
Hope my answer has helped you!
Hello There!
Mercury is the only metal that is not solid at room temperature.
Mercury is highly toxic. The color of Mercury is silvery-white and it has a smooth/silky texture.
Which type of stress is a uniform stress that doesn’t lead to earthquakes
Answer:
Lithostatic pressure
Explanation:
Final answer:
Bulk stress, also known as volume stress, is the uniform stress that does not lead to earthquakes as it decreases an object's volume uniformly without causing shear movements.
Explanation:
The type of stress that is uniform and does not lead to earthquakes is known as bulk stress or volume stress. Unlike tensional, compressional, and shear stresses which can lead to earthquakes and the formation of various geological structures, bulk stress is experienced by objects when they are subjected to an equal force from all directions, such as submerged objects in a fluid. This kind of stress tends to decrease the volume of the object uniformly, causing a bulk strain without leading to the shear movements that can result in earthquakes.