During growth and development of the embryo, the multipotent cells move to particular regions of the embryo and begin to differentiate - beginning in the gastrulation stage. The cells vary in the silencing of particular genes so that they produce only the appropriate proteins for the specific function of the organs that they develop into. Silencing means particular areas of the genetic material are inaccessible to polymerase enzymes because they are locked up into nucleosomes by histone complexes. Therefore the genes that are turned on in skins cells may differ slightly with those of the spleen cells.
Final answer:
Spleen cells express specific genes according to their function thanks to highly regulated mechanisms that depend on transcription factors, gene translocation, and developmental signals, ensuring only necessary genes are active.
Explanation:
While every somatic cell contains the same DNA, not every cell expresses the same set of genes. The expression of specific genes is highly regulated to ensure that each cell functions appropriately within its environment. In the case of spleen cells, they are differentiated to perform tasks unique to the spleen, such as filtering the blood and immune responses. This differentiation is guided by various factors, including transcription factors, gene translocation, and dependency on developmental signals. These factors influence which genes are active within the spleen cells. Factors such as what type of cell the gene is in, its stage of differentiation, and what extracellular signals the cell is receiving, all contribute to the regulation of gene expression. This ensures that cells like those in the spleen only express genes needed for their specific functions.
What farming method is used in dry or desert areas?
(A) chinampas
(B)drip irrigation
(C)wind-powered pumps
(D)aqueducts
Answer: Option B
Explanation:
Desert farming is the practice of developing agriculture in deserts. Agriculture can be defined as the act of irrigation, water supply and farming.
The desert farming is different from the other types of farming and it has been practiced by the person living there.
These practices are to be used very precisely as the water is not available in a plenty amount. Taking into consideration drip irrigation is used in the desert and dry areas.
Drip irrigation can be defined as the modern method by which the micro-irrigation technique in which the water and the nutrients are saved and it allows the water to drip slowly into the roots of plants.
Answer:
B. Drip irrigation
Explanation:
What process is caused by some combination of wind, water flow and gravity? A.Physical weathering B.Erosion C.Chemical weathering D.Mass wasting
Answer: B. Erosion
Explanation:
Weathering is a process of physical disintegration of the rocks or other materials present over the earth crust into small particles or sediments due to a physical agent such as water or wind. The erosion is the process of mechanical or physical removal of the top layer of the soil or any surface material and transportation of the material to the other location. Mass wasting is the process in which unstable materials get dislocate from their place due to the effect of gravity.
Erosion is caused by the combination of physical factors like wind, water and gravity.
Landslides occur when earth materials that are no longer held by friction move down a slope with the help of gravity. I think this is true. But I really need help be because this may be wrong. I'm offering 11 points and marking the best answer as brainliest. PLEASE DON NOT JUST ANSWER FOR THE POINTS BECAUSE I AM VERY SMART AND CAN ANSWER ANY QUESTION ANYONE HAS BUT IF YOU GIVE ME A WRONG ANSWER, THEN YOU WON'T GET MARKED BRAINLIEST.
Yes, the given statement is true.
A landslide is illustrated as the movement of debris, the mass of rock, or earth down a slope. The landslides are a kind of mass wasting that signifies any down-slope movement of rock and soil under the direct effect of gravity.
The slope movement takes place when the forces functioning on down-slope primarily because of gravity exceeds the strength of the Earth substances, which compose the slope. The causes comprise elements, which elevates the influences of down-slope forces and factors, which contribute to reduced or low strength.
What is a bacteriophage? a nucleic acid that infects viruses a bacterium that infects viruses a virus that infects bacteria a protein that infects bacteria
Bacteriophage is a virus that infects bacteria.
Answer:
Bacteriophage is a virus that infects the bacteria.
Explanation:
Bacteriophages are viruses that can infect the bacteria. They have a hexagonal head and a tail. The head consists of viral DNA. The bacteriophage sits on the bacterial cell and injects the genetic material through its tail into the bacterial body. This process is called transduction. Inside the bacteria, the viral genome replicates and produces new viruses. After some time the lysogenic enzyme present in the virus breaks the bacterial wall and all the viruses emerge out. This ultimately causes the death of the bacteria and newly formed viruses again to go for a search of new bacteria.
HURRY ! 30 pts Where will the image of the paper clip appear to the observer? 1 2 3 4
the observer will see the paper clip at 3
We know that animals can be separated into two big groups: vertebrates and invertebrates. An example of each would be a horse and a horse fly. Even though these animals are very different structurally, they have several things in common. Both animals MUST have a method for ____________ because they are both classified as heterotrophs.
A) moving
B) using oxygen
C) getting food
D) reproduction
The correct answer is C.) Getting food. Unlike plants, which have the ability to produce enough food through photosynthesis, heterotrophs, which include all animals (Invertebrates are animals as well) must gain their food from outside sources. Hope this helped!
I agree the answer is C.
Which of these best explains why Earth’s inner core is a solid?
Low pressure due to other layers forces the particles to stay closer.
High pressure due to other layers forces the particles to stay closer.
High temperature due to other layers keeps the particles close together.
Low temperature due to other layers keeps the particles close together.
Answer:
The answer is C
Explanation:
If you are using a rope to pull a box up a ramp, which force is acting one the box?
Applied force is what I would assume
Where do joint capsule receptors send proprioceptive information?
TO. YOUR. BRAIN. have a nice day?
which image shows a cell with condensed chromosome
image b or image a
Fill a glass with water above the rim. It forms a domed surface. Add a paper clip and watch it float, even though the paper clip is made of a metal that is denser than water. This is due to water's surface tension. Water has several very unique properties, like surface tension, cohesion, and adhesion because water
Did you make a mistake? I don't really understand what you are asking, but if you post this again with proper pronunciation, I will gladly try to answer your question.
-Aparri
Answer: Water is polar and every water molecule electrically attracts the neighboring water molecules
Explanation:
The water molecules are polar molecules and attract the neighboring water molecules, this property of water is known as surface tension.
This property allows the substances to float on the water surface. One water molecule gets attracted towards the other molecule. This is due to the property of hydrogen bonding.
Water is a polar molecule and attracts the substances like that only.The metal clip will float on water before of strong bonding between the water molecules.
What ions are produced from acids and from bases
When dissolved in water, acids dissociate to produce hydrogen ions, while bases dissociate to produce hydroxide ions. For example, hydrochloric acid yields hydrogen and chloride ions, while sodium hydroxide yields sodium and hydroxide ions.
Explanation:Acids and bases interact with water to produce certain ions. In water, acids dissociate to produce hydrogen ions (H+), whereas bases dissociate to produce hydroxide ions (OH-). This behavior forms the basis of the Arrhenius definition of acids and bases. For example, hydrochloric acid (HCl) is a common acid that when dissolved in water will dissociate into hydrogen ions (H+) and chloride ions (Cl-). Conversely, sodium hydroxide (NaOH) is a typical base that will dissociate into sodium ions (Na+) and hydroxide ions (OH-) when dissolved in water.
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Acids produce hydrogen ions [tex](H^+)[/tex], while bases produce hydroxide ions [tex](OH^-)[/tex] when dissolved in water.
An acid is a substance that can donate a proton (H^+) to another substance, which is known as a Bronsted-Lowry acid. When an acid dissolves in water, it dissociates into its constituent ions, releasing hydrogen ions (protons) into the solution. For example, hydrochloric acid (HCl) dissociates into H^+ and Cl^- ions in water:
[tex]\[ \text{HCl} \rightarrow \text{H}^+ + \text{Cl}^- \][/tex]
On the other hand, a base is a substance that can accept a proton (H^+) from another substance, which is known as a Bronsted-Lowry base. When a base dissolves in water, it dissociates to produce hydroxide ions (OH^-). For instance, sodium hydroxide (NaOH) dissociates into Na^+ and OH^- ions in water:
[tex]\[ \text{NaOH} \rightarrow \text{Na}^+ + \text{OH}^- \][/tex]
In summary, the characteristic ions produced by acids and bases in aqueous solutions are hydrogen ions (H^+) for acids and hydroxide ions (OH^-) for bases. These ions are responsible for the acidic and basic properties of the respective solutions."
Aquatic plants can live in the benthic zone of shallow lakes because a. They live on decaying organisms b. The bottom is always c. They cannot tolerate salt water d. Sunlight reaches the bottom
The correct answer is option d, that is, the sunlight reaches the bottom.
A community of organisms that thrives on, in, or close to the seafloor is known as the benthic zone. The species living in the benthic zone are known as benthos. The species dwells at the bottom of the freshwater bodies like rivers and lakes.
The plants, which lives in the higher levels of the benthic zone are known as phytobenthos. However, these plants require sunlight in order to perform the process of photosynthesis. Therefore, these bottom-thriving plants are found in water, which is shallow enough for light to reach towards them. These plants are considered as benthic producers that signifies that they utilize the energy from the Sun to generate tissues of plants, which can be consumed by other species.
Answer:
Aquatic plants can live because sunlight reaches the botton of lakes
Explanation:
The Sun appears _______ in the sky and for a _______ period of time each day during summer than it does during winter.
A.
lower; shorter
B.
higher; longer
C.
lower; longer
D.
higher; shorter
Answer: The answer is B
Explanation:
Did it on study island
These are animals that share the common characteristics of body hair, production of milk, giving birth to live young, and endothermic metabolism.
MAMMALS
That is correct. Any animal that produces milk is a mammal. That is the key characteristic that defines Class Mammalia.
Asexual reproduction is not only found in the plant kingdom, what is another kingdom has examples of asexual reproduction?
A.only the fungi kingdom
B.the fungi, and animal kingdom
C.the protist and the fungi kingdoms
D.examples can be found in all the kingdoms
Asexual reproduction occurs in multiple kingdoms besides plants, including protists, fungi, some animals, and bacteria (Monera). Protists can reproduce asexually through binary fission, fungi often reproduce through spore formation, and certain animal species like starfish can undergo fission. Even bacterial organisms reproduce asexually by binary fission.
Explanation:Asexual reproduction is a mode of reproduction that does not involve the exchange of genetic material and is present in various kingdoms beyond the plant kingdom. An example of a kingdom that exhibits asexual reproduction is the protist kingdom, with organisms such as protists undergoing binary fission, a form of asexual reproduction. Similarly, the fungi kingdom demonstrates asexual reproduction, with many fungi creating spores which can develop into new individuals. Certain animals also reproduce asexually; for instance, some species of sea anemones and starfish can undergo fission, splitting into multiple individuals. Even bacterial organisms, part of the Monera kingdom, reproduce asexually through binary fission.
Therefore, the correct answer to the question "What is another kingdom that has examples of asexual reproduction?" is D. examples can be found in all the kingdoms.
What is the principle chemical compounds that cells use to store and release energy called? What are it’s three main parts?
The principle chemical compound that cell uses to store and release energy is Adenosine triphosphate or ATP.
Adenosine triphosphate :
living things use chemical fuels as well, one of the principal chemical compounds that cells use to store and release energy is adenosine triphosphate ATP.
Three main parts:
ATP consists of
adrenine, a 5-carbon sugar called ribose and three phosphate groups.
Final answer:
The principle chemical compound used by cells to store and release energy is adenosine triphosphate (ATP). It consists of an adenine base, a ribose sugar, and three phosphate groups.
Explanation:
The principle chemical compound that cells use to store and release energy is called adenosine triphosphate (ATP). ATP serves as the primary energy currency of all cells, analogous to how money is used to buy goods and services. The three main parts of an ATP molecule include:
An adenine base, which is a nitrogen-containing compound.
A ribose sugar, which is a five-carbon sugar molecule.
Three phosphate groups, which are linked in a chain and store a significant amount of potential energy.
Cells store energy during the synthesis of ATP (anabolism), and release it when ATP is broken down (catabolism) which then provides the energy needed for cellular activities.
Scientists have noted a decline in the number of all mushroom species dating back to the early 1900s. In addition, annual crops of edible mushrooms in France and Germany have declined since 1950. One hypothesis explaining the decline is that edible fungi are being overharvested. Global warming and air pollution have also been considered as part of the problem. What evidence helps to exclude overharvesting as the cause of the overall decline? A) a similar decline in edible North American mushrooms B) absence of mushrooms near coal-burning powerplants in Indonesia C) increase in mushroom species in a region of tropical South America D) declines in poisonous, non-edible mushroom species in cool climates
The correct answer should be D.) Declines in poisonous, non-edible mushroom species in cool climates. Although question B does provide evidence that Global warming could be the cause of the declines, it still doesn't disprove the theory that overharvesting could be the cause as well. Question C could be caused by a number of things, such as deforestation, a local change in climate, removal of agricultural pests, ect. Question A supports the hypothesis that overharvesting is the cause of the decline, instead of disproving it. Hope this helped!
The decline in poisonous, non-edible mushroom species in cool climates helps to exclude overharvesting as the main cause of the overall decline in mushroom species, suggesting that overarching environmental issues like global warming and air pollution are more likely causes.
Explanation:The evidence that helps to exclude overharvesting as the cause of the overall decline in the number of all mushroom species is option D) declines in poisonous, non-edible mushroom species in cool climates. This implies that overharvesting of edible mushrooms is not likely the main cause because even the non-edible (which are not harvested) are in decline. This explanation suggests that overharvesting, which would primarily affect edible species, is not the only factor. Instead, overarching environmental issues, like global warming and air pollution, which would affect all types of mushrooms regardless of their edibility, are more likely causes of the decline.
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The atmosphere stores much more carbon dioxide than the oceans.
True
False
Answer:
false
Explanation:
which type of tropism aids plants the most in photosynthesis
Tropism is the response of an organism towards any stimuli. stimuli may be light, gravity, temperature etc. In photosynthesis plants are responded towards light, and growth of their shoot system are towards the light source. This type of tropism is called phototropism.
Answer:
Tropism refers to the response a body system of the organism produces according to an external stimulus. Plants shows tropism depending upon the type of stimuli. The stimuli can be sunlight, gravity, water or even touch. The tropism related with the sunlight is phototropism. Phototropism is a typical response of a plant shoot towards the sunlight. The plant shoots grow in the direction of sunlight, hence they show positive phototropism, whereas plant roots grow in direction against the sunlight, they show negative phototropism. Phototropism helps in availing sunlight to plants which is a necessary ingredient required for photosynthesis.
The process of blank leads to the information of new species by?
The process of mutation leads to the formation of new species. Species evolve because of the accumulation of mutations that occur over time. Some mutations are harmful where as some are useful which are selected by the nature, nothing but natural selection.
Which of these best describes Earth’s crust?
Inner layer consisting of two parts
Middle layer, density increases with depth
Top portion called asthenosphere, thickest layer
Thinnest under the oceans and thickest under continents
D. Thinnest under the oceans and thickest under continents
Explanation - Earth is divided into three layers - crust, mantle and core. Crust is the outer most layer, mantle being the middle one and core is the innermost layer.
Beneath the oceans, crust is thin whereas beneath the continents, crust is the thickest. The density of the Earth's crust is least or minimum as compared to the mantle and core. The composition of crust are as follows -
Solid rock has silicon and oxygen .Oceanic crust has basalt .Continental crust has granite .Answer:
D. Thinnest under the oceans and thickest under continents
suppose you are hiking in the hills and you come across a wall of rock. you look closely at the rock and you notice a trilobite fossil embedded in it. what might this fossil suggest yo you about the hills you are hiking in?
A. The hills used to be volcanic and are now dormant
B. The hills, at one time, were under water
C. The hills were once at a much higher elevation
D. The hills are rich in sandstone
Your answer would be B). The hills, at one time, were under water. Trilobite fossils are fossils that are rocks that have bones engraved in them. Trilobites are marine animals that have been extinct for thousand of years. Since they're marine animals, the hill use to have water. You wouldn't see a Trilobite fossil in a land where there has been no source of water.
Hope this helps out :)
The answer would be: B) The hills, at one time, were under water.
Explanation:
- Trilobite were once a marine creature. Trilobite's are extinct, that being said they are no longer living.
- Marine is basically another word for Sea, which Trilobite were a marine creature.
Based on those two statements above, I can conclude that the hill's were once under water.
That being said, the answer is: B) The hills, at one time, were under water.
I hope this helps! :)
-LizzyIsTheQueen
Which two structures are not found in animal cells
Cell wall and chloroplasts are found in the plant cell, but they are not found in animal cells.
All climates in the southern hemisphere are warmer than those in the northern hemisphere (1point)
The statement ''All climates in the southern hemisphere are warmer than those in the northern hemisphere'' is false.
While it is true that the southern hemisphere generally experiences warmer temperatures during its summer months (December to February) due to its closer proximity to the sun, it is not accurate to say that all climates in the southern hemisphere are consistently warmer than those in the northern hemisphere.
The temperature variations across both hemispheres are influenced by various factors including latitude, altitude, proximity to large bodies of water, ocean currents, and prevailing winds. For instance, regions near the equator in both hemispheres tend to have warmer climates year-round, while polar regions experience colder temperatures. Additionally, factors such as the presence of mountain ranges, desert regions, and ocean currents can lead to significant temperature variations within each hemisphere.Therefore, while some climates in the southern hemisphere may indeed be warmer than their northern hemisphere counterparts, it is not universally true for all climates, making the statement false.
Complete question:
All climates in the southern hemisphere are warmer than those in the northern hemisphere.
true/ false
Which statement describes potassium-argon dating?
Potassium-40 decays into argon gas over time.
Argon breaks down into other elements and compounds.
Potassium-40 becomes stable when trapped in rocks.
Argon is unstable and will decay into potassium-40 over time.
Answer: Potassium-40 decays into argon gas over time.
Explanation: Potassium-argon dating is a dating method used to determine the age of sedimentary rocks by comparing the proportion of K-40 to Ar-40 in a sample of rock, and knowing the decay rate of K-40.
Potassium-40 undergoes decay following first order kinetics as given below:
[tex]_{19}^{40}\textrm{K}\rightarrow _{18}^{40}\textrm{Ar}+_{0}^1e[/tex]
Answer:
A.
Explanation:
did the test
Why did comets form in the Kuiper belt and not in the asteroid belt
Answer:
Asteroids lie in the asteroid belt and comets lie in the Kuiper belt beyond the orbit of Neptune. The composition of asteroids and comets is different.
Comets are composed of rocks, dust, ice and frozen gases. These are thought to be formed from the debris of the solar system.
On the other hand, asteroids are irregular shape and size rocky bodies lying between the orbit of Mars and Jupiter. There are thought be remnants of a planet which could not form.
Comets formed in the Kuiper belt because of very low temperature and what they are composed of.
when the process of mitosis is correctly completed, the daughter cells should contain exact copies of all of on organisms genes. which biomolecule contains all of the organisms genes
The biomolecule that contains all of an organism’s genes is DNA. During the mitosis process, the genomic DNA is replicated, ensuring each daughter cell contains an exact copy of the organism's genes. In both prokaryotic and eukaryotic cells, the outcome of cell reproduction is a pair of daughter cells, which are genetically identical to the parent cell.
Explanation:The biomolecule that contains all of an organism’s genes is DNA (Deoxyribonucleic Acid). During the process of mitosis, the genomic DNA is replicated and then allocated into the daughter cells.
This ensures that each new cell contains an exact copy of the genetic material, preserving the organism's complete genetic makeup in each individual cell. Just as you pointed out, when mitosis is correctly completed, the daughter cells should contain exact copies of all of an organism's genes.
In both prokaryotic and eukaryotic cells, the outcome of cell reproduction is a pair of daughter cells, which are genetically identical to the parent cell. This is known as cellular cloning. In bacterial cells, an analogous simpler process called binary fission occurs, where the single, circular DNA chromosome of the bacteria is replicated and passed onto the offspring cells, achieving the same outcome of identical genetic information.
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Collin balanced an egg with the help of forks on the floor. His brother jumps on the floor nearby and the balanced egg falls over. Why does the egg fall?
The bouncing form his brother causes vibrations within the floor causing the egg to fall
Plants are used on slopes to prevent erosion. Which of these plants would be the best choice to plant on a slope to provide erosion control? A. dandelions B. grass C. oak trees D. hickory trees
The best plant among the following that can help in this is Hickory trees and oak trees.
Answer: Option C & D
Explanation:
When there is a huge land slide or a heavy rainfall the top layer of the soil gets eroded thereby causing a large decline in the fertility of the soil. In addition this also causes a large hindrance for inhabitants of the particular place.
Hence trees like hickory have large roots that bind the soil and prevent the run off through soil erosion. And the best shade trees like oak trees are helps to prevent erosion.
Plants used on slopes to prevent erosion are oak trees and hickory trees.
The correct options are C and D.
What is soil erosion?
Soil erosion is the removal of topsoil with the heavy flow of water.
This flow of topsoil removes the nutrients and good soil.
It depletes the quality of soil.
Thus, to prevent soil erosion, we should plant trees on barren lands.
The roots f tress and plants hold the soil and prevent from flowing it.
Thus, the correct options are C. oak trees, D. hickory trees.
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