Answer: external
Explanation: warmth on outside so u can feel inside
1. Why does sand settle to the bottom of a jar
faster than mud does?
2. What is sediment?
1. Sand particles are too big to dissolve so their density sinks them
2. Sediment is a naturally occurring material that is broken down by processes of weathering and erosion, and is subsequently transported by the action of wind, water, or ice or by the force of gravity acting on the particles.
Which property of oceans best explains why they have a major effect on climate?
A.
They hold a large amount of heat energy.
B.
They have a constant tidal movement.
C.
They absorb gases from the atmosphere.
D.
They contain large amounts of dissolved salt.
Answer:
It's A.
Explanation:
They hold a large amount of heat energy
Answer:
A.
They hold a large amount of heat energy.
Explanation:
Oceans are of magnificent at taking up heat generated from m the sun and keeping it. If the Oceans were poor at it, the heat would be confined as a result of the greenhouse activity impact and it results to certain changes in the climate such as making it extremely hot. Through this process, oceans take in massive proportion of heat and successfully decreases the total temperature of the world.
If the endosymbiont was on its way to becoming an organelle, how would its genome be different from a free-living organism of the same species?
The process of Endosymbiosis generally leads to the production of an organelle in order to perform specific functions in the body of living organisms. This facilitates the alteration in the genome of organisms as compared to the free-living organism of the same species.
What is Endosymbiosis?Endosymbiosis may be defined as a type of process through which one organism lives inside the other and the resulting two typically behave as a single organism. This is caused when both organisms mutually favor or support each other.
According to the context of this question, the cell organelle mitochondria evolved when an anaerobic predator cell (mesokaryote) engulfs alpha-proteobacteria which is aerobic in nature.
Similarly, the chloroplast also originated with the same process of endosymbiosis. After primary endosymbiosis, the resulting organism then engulfs cyanobacteria in order to form a photosynthetic-specified cell organelle known as chloroplast.
Both these process considerably changes the morphology and function of genomic sequences as compared to the free-living organism of the same species.
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An endosymbiont on its way to becoming an organelle would have a genome different from a free-living organism due to reduction in genome size, resemblance of DNA sequence and structure with their bacterial counterparts and the fusion with the host's genes.
Explanation:This question pertains to the process of endosymbiosis, specifically genome fusion, whereby an organism (endosymbiont) becomes an organelle within a larger host organism. The endosymbiont's genome would differ from a free-living organism of the same species in several ways.
Firstly, over time, some of the endosymbiont's genes move into the host cell's nucleus, which results in the reduction in the size of its genome compared with the free-living counterpart. Therefore, endosymbionts usually have smaller genomes, an example of this is mitochondrial DNA which is inherited only from the mother and represents the smallest chromosome.
Secondly, DNA sequence and chromosome structure of endosymbionts closely resemble their bacterial counterparts showing the genetic correlation and origin.
Lastly, the endosymbiotic process often results in the genome consisting of both the endosymbiont's genes and the host's genes. This fusion can be seen as part of the Endosymbiont Theory, which is widely accepted as the mechanism through which eukaryotic cells acquired their mitochondria and chloroplasts.
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WHY DO SCIENTISTS CONTINUE TO ADD NEW KINGDOMS TO THEIR SYSTEM OF CLASSIFICATION?
Answer:
Scientists continue to add new kingdom to the system of classification because with the passage of time new organisms are discovered which have unique properties. These organisms donot fit to place in kingdom of classification. For example, protists are the organisms having both plants and animals characteristics so it cannot be placed into plants or animals kingdom so scientists make a new kingdom named protista.
Answer:
because with the passage of time new organisms are discovered which have unique properties
Explanation:
Compare the organization of DNA in prokaryotic and eukaryotic cells
Answer: prokaryotic cells have no nucleus, no organelles and a small amount of DNA. Eukaryotic cells do have a nucleus, along with many organelles, and more DNA.
Explanation:
The energy released when sugar molecules are
broken down is stored in
(1) minerals
(3) DNA
(2) ATP
(4) wastes
Answer:
The energy released when sugar molecules are broken down is stored in ATP
Explanation:
Answer:
Atp
Explanation:
Once cells with nuclei developed, organisms were able to become more complex, which allowed them to adapt to the conditions in more habitats. By which process do organisms adapt and evolve?
Answer:
Organism tend to adapt and evolve through natural selection.
Explanation:
Natural Selection can be described as a phenomenon by which those organisms are favored and selected by nature which are better adapted to live in an environment. These organism are able to reproduce and pass on their favorable traits to their offspring. Through natural selection, evolution occurs with the passage of time as those traits which are more suited to the ecosystem start existing in organisms.
Final answer:
Organisms adapt and evolve through the process of evolution. Evolution involves mutations that produce new traits, which are then acted upon by natural selection, allowing well-adapted traits to become prevalent in a population. Multicellular organizations such as eukaryotes evolved cells with specialized functions, leading to increased complexity and adaptability.
Explanation:
Organisms adapt and evolve through the process of evolution, which is characterized by gradual change in a population over time. This can lead to the emergence of new species from older ancestral species.
Mutations are random changes in an organism’s hereditary material that can result in new traits. Some mutations can enhance an organism’s ability to survive and reproduce in a particular environment. Natural selection, or 'survival of the fittest,' then acts on these traits. Organisms that are better adapted to their environment tend to survive and produce more offspring, spreading the advantageous traits through the population.
As multicellular organisms, such as eukaryotes, became more complex, they developed the ability to specialize their cells and organize them into tissues, organs, and systems. This specialization and organization allow for greater efficiency and the ability to maintain homeostasis. Over time, this complexity has enabled organisms to inhabit a wide variety of habitats on Earth.
What type of rna is produced in the nucleus
Answer:
mRNA
Explanation:
Messenger RNA produced in the nucleus and go to the cytoplasm. In cytoplasm two other types of RNA ribosomal and transfer RNA present that read the sequence of mRNA and produce protein molecule.
This image shows the RBCs of a person with sickle cell anemia, an inherited condition. What effects could the shape of these cells have on the efficiency of the circulatory system?
Answer:
The shape of the abnormal red blood cells in sickle cell anemia can affect the efficiency of the circulatory system by obstructing the flow of blood through the arteries.
Explanation:
Red blood cells are the cells responsible for transporting oxygen and carbon dioxide throughout the body, and their spherical shape allows them to pass through blood vessels of any calibre.
A red blood cell in sickle cell disease loses its spherical shape, acquiring a half-moon shape, which can lead to its accumulation inside the arteries and produce a blockage, decreasing the efficiency of the circulatory system.
The arterial obstruction may lead to a decrease in oxygenation in the sites that are irrigated by that artery.
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Answer:
Because the cells are sickle shaped, their surface area is decreased. These RBCs likely cannot carry oxygen as effectively as regular blood cells. The shape can cause the cells to get stuck in the blood vessels, creating a blockage.
Explanation:
The human disease phenylketonuria has symptoms that include mental problems, chronic skin rashes, and reduced hair and skin pigmentation. Phenylketonuria can be caused by a mutation in a single gene.
Phenlyketonuria is an example of pleiotropy. Based on this, it can be concluded that pleiotropy occurs when
A.
a single gene influences multiple traits.
B.
a trait is influenced by both genes and environment.
C.
a trait is not influenced by genes.
D.
a single trait is influenced by many genes.
Answer:
The human disease phenylketonuria has symptoms that include mental problems, chronic skin rashes, and reduced hair and skin pigmentation. Phenylketonuria can be caused by a mutation in a single gene.
Phenlyketonuria is an example of pleiotropy. Based on this, it can be concluded that pleiotropy occurs when a single gene influences multiple traits.
Explanation:
The correct answer is option( A), a single gene influences multiple traits, exemplified by phenylketonuria where a mutation in the PAH gene leads to various symptoms, showcasing pleiotropy.
Pleiotropy is a genetic concept where a single gene can have multiple effects on an organism's phenotype. This means that one gene can influence several different traits. In the case of phenylketonuria, a mutation in a single gene (the PAH gene, which encodes the enzyme phenylalanine hydroxylase) leads to a variety of symptoms, including mental problems, chronic skin rashes, and reduced hair and skin pigmentation. This illustrates how one gene can have a pleiotropic effect, causing a range of distinct symptoms.
Let's consider the other options to understand why they are incorrect:
B. a trait is influenced by both genes and environment.
This option describes the concept of gene-environment interaction, where the expression of a trait is determined by both genetic and environmental factors. While this is an important aspect of genetics, it does not describe pleiotropy.C. a trait is not influenced by genes.
This statement is incorrect because almost all traits are influenced by genes to some extent. Even traits that are heavily influenced by the environment have some genetic component.D. a single trait is influenced by many genes.
This option describes polygenic inheritance, where a single trait is affected by multiple genes. While this is also an important concept in genetics, it is not an example of pleiotropy, which involves one gene affecting multiple traits.Therefore, the definition that best fits the concept of pleiotropy, as exemplified by phenylketonuria, is that a single gene influences multiple traits."
Because the tilt of Earth’s axis always points in the same direction, the seasons in the Northern and Southern Hemispheres are always ___?
Answer:
Opposite
Explanation:
If its summer in the northern hemisphere it is winter in the southern.
Because the tilt of Earth's axis always points in the same direction, the seasons in the Northern and Southern Hemispheres are always opposite.
The Earth has a constant axial tilt of 23.5 degrees, with the axis always pointing towards Polaris, the North Star, as it orbits the Sun. When the Northern Hemisphere is tilted towards the Sun during its orbit, it experiences summer, with longer days and shorter nights. Conversely, the Southern Hemisphere, being tilted away from the Sun at the same time, experiences winter, with shorter days and longer nights. This tilt and the Earth's orbit around the Sun lead to the different seasons experienced by each hemisphere throughout the year. Acting out the Earth's revolution around a lamp in a dark room while leaning in the same direction can be a helpful illustration for students to understand this concept.
A force is a
A. push B. pull C. Both A and B D. Neither A nor B
Answer:
C.
because a force is what causes an object to move
What happens when sex cells have mutations during replication?
O
A. Silent mutations
O
B. Offspring with mutations
O
C. Formation of proteins
O
D. Problems in somatic cells
ES
When sex cells, also known as gametes, have mutations during replication, the most likely outcome is that the offspring produced will have mutations. Therefore, the correct answer is B.
During the replication of sex cells, errors can occur in the DNA sequence due to various factors such as environmental factors, errors in DNA replication, or exposure to mutagens.
These mutations can lead to changes in the genetic information carried by the sex cells. When fertilization occurs, and the mutated sex cells combine to form a zygote, the resulting offspring will inherit the mutations present in their DNA.Some mutations may be silent, meaning they do not have a noticeable effect on the phenotype or functioning of the individual.However, other mutations can have significant impacts, ranging from mild to severe genetic disorders or abnormalities.Thus, the correct option is B.
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1) Describe how chromosomes and genes are related. (3 points)
Answer: Chromosomes are structures within cells that contain a person's genes. Genes are contained in chromosomes, which are in the cell nucleus.
Explanation:
Even land that is now very diverse once started out as what?
As of right now, the land is pretty spread out. But millions of years ago, like, we're talking dino time, all the land was just one chunk. This chunk was called Pangaea, or Pangea. But before everything split apart into multiple continents, there was just one; a supercontinent. Hope that helps!
Every piece of land, regardless of its current diversity, initially started as primitive, biologically simple terrain. It later transformed through human agricultural practices, urbanization, colonization, and other socio-economic processes into diverse landscapes.
Explanation:Every land, regardless of its present diversity, started out as a primitive, biologically simpler land. For example, land that now demonstrates agricultural diversity was uncultivated initially and slowly transformed through human farming practices over thousands of years, mutating from a single-crop field to multiple-crop varieties.
In the context of human habitation too, the diverse landscapes we see today were forged through varying cultural, social, and economic processes including colonization, urbanization, conflict, and cooperation over time. For example, the vast forests of New England, which were once untouched, were dramatically altered by early colonial settlers' forest management practices and their urge for expansion.
Land that was originally perceived as wilderness has been transformed into diverse and intricate landscapes by human activity, farming, and urban development. Hence, even regions that express rich and complex diversity today started out as simpler, biologically and culturally homogeneous territories.
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The formation of ova, or female reproductive cells, occurs when diploid germ cells undergo meiosis. In female swamp wallabies (Wallabia bicolor), diploid germ cells contain 101010 chromosomes.
At the beginning of meiosis I, a female wallaby germ cells contains
Choose 1 answer:
(Choice A)
A
10 homologous pairs of chromosomes comprising a total of 20 chromatids
(Choice B)
B
5 homologous pairs of chromosomes comprising a total of 20 chromatids
(Choice C)
C
10 homologous pairs of chromosomes comprising a total of 10 chromatids
(Choice D)
D
5 homologous pairs of chromosomes comprising a total of 10 chromatids
Answer:
(Choice B) 5 homologous pairs of chromosomes comprising a total of 20 chromatids.
Explanation:
Homologous chromosome are those two chromosomes which have same gene but different in shape and appearance.
Chromatids are the identical copies of chromosome. Single chromosome splits into double number of chromatids. In 5 pairs, 10 chromosomes are present so 10 chromosomes splits into 20 chromatids.
The beginning of meiosis I in female swamp wallabies contains 5 homologous pairs of chromosomes, totaling 20 chromatids.
The correct answer is:
(Choice B) B. 5 homologous pairs of chromosomes comprising a total of 20 chromatids.
In female swamp wallabies, which have a diploid chromosome number of 10 (10 pairs of chromosomes), at the beginning of meiosis I, the germ cells contain homologous pairs of chromosomes. Meiosis I is the first stage of meiosis, where homologous chromosomes pair up and undergo crossing over, resulting in genetic recombination.
Since the swamp wallabies have 10 pairs of chromosomes, this means they have 5 homologous pairs. Each homologous pair consists of two chromosomes (paternal and maternal), and during meiosis I, these homologous pairs align and exchange genetic material. Therefore, each chromosome consists of two chromatids due to DNA replication during interphase before meiosis I begins.
So, at the beginning of meiosis I, a female wallaby germ cell contains 5 homologous pairs of chromosomes, comprising a total of 20 chromatids (2 chromatids per chromosome × 10 chromosomes). This configuration allows for genetic variation and the production of genetically diverse ova, essential for reproductive success and species survival.
When humans chose the traits they want in offspring it is called?
Answer:
Artificial selection or selective breeding
Explanation:
The process of artificially selecting traits by humans is known as artificial selection. It is against the process of natural gene selection which allows for evolution to occur.
Desired traits and character states are favored over others. They are usually employed in agricultural practices which helps to produce more viable and adapted plant and animal species.
If you go outside on a hot summer day with a double scoop ice cream cone, how will the cold ice cream interact with the hot
outside air?
Heat from the ice cream will move to the air
Cold from the ice cream will move to the air.
Cold from the air will move to the ice cream.
Heat from the air will move to the ice cream
Answer:
D
Explanation:
edge
Rank the following technical skills from the most basic to the most advanced.
perform an MRI, repair an EEG machine, read patient charts, calibrate microscopes
read patient charts, perform an MRI, calibrate microscopes, repair an EEG machine
read patient charts, calibrate microscopes, perform an MRI, repair an EEG machine
repair an EEG machine, read patient charts, calibrate microscopes, perform an MRI
Answer:
read patient charts, calibrate microscopes, perform an MRI, repair an EEG machine
Answer:
the answer is c- reading patient charts, calibrate microscopes, perform an mri, repair an eeg machine
Explanation:
just did the unit test review, hope this helps <3
Thomas is studying the daily electric power used by his town. He has summarized the power consumption of his town over the course of an average day in the which of the following inferences could Thomas make?
Answer:
Thomas is studying the daily electric power used by his town. He has summarized the power consumption of his town over the course of an average day in the which of the following inferences could Thomas make?
Thomas could simply infer the total amount of electric power consumed averagely in a day for his home town which might be multiplied to get a total for a week, month or entire year
Explanation:
QUESTIONS
1. What are the two main threats to African elephant populations?
Scientists estimate that African elephants are being lost at a rate of Iday.
Answer:
1) Escalating poaching, or illegal killing, for the commercial trade in ivory and meat.
2) Growing demands of exploding human populations and poverty.
The main threats to African elephant populations are poaching, driven by the high demand for ivory, and habitat loss due to human activities such as deforestation and expansion of agricultural lands.
Explanation:The two main threats to African elephant populations are poaching and habitat loss. Poaching is a significant threat primarily due to the demand for elephant ivory, especially in Asia. Elephants are often killed to harvest their tusks, which can sell for high prices on the black market. The second major threat is habitat loss, caused largely by human activities such as deforestation and expanding agricultural land use. As the habitat of elephants shrinks, they come into more frequent contact with humans, often leading to conflicts.
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What is wrong with genetic engineering in humans?
Answer:
People being scared of becoming inferior .
Explanation:
Once someone has become genectically altered they might have some advantages up on regular humans that don't want to be genetically altered. The unaltered humans would always be scared of being attacked by the altered humans . Its the superhero scenario. In comics you see some humans fear superman because he has the power to kill all of them & that leads to that one guy developing weapons (lex luthor) to try and level the playing field.
A map's orientation is typically determined by a/an
A. Legend
B. Grid pattern
C. Index
D. Compass rose
A map's orientation is typically determined by a Compass rose.
Option: (D)
Explanation:
A compass rose is also known as a wind rose or ‘rose of the winds’. It is used to term for the graduated markings found on the ‘traditional magnetic compass’.
A figure on a compass, map, nautical chart, or monument used to display the orientation of the primary directions, east, west, north, and south and their intermediate points.
A map indicates the real world. By orienting a map, we are positioning to the direction North is actually pointing north.
When we orient a map and know where you are on the map, you can look in a certain direction and see a real landmark and find it on the map.
Answer: Compass Rose
Explanation:
A compass rose is used to determine a map's orientation. It's a circular figure on a map that indicates direction.
explain why the north American cactus and African euphoria species have evolved such similar adaptations.
Answer:
The North American Cactus and African Euphorbia species originated from two different, but similar plants.
Explanation:
These plants were the typical herbaceous species of the early Earth, characterised by their slim stems and large, wide leaves. However, their evolutionary paths began to change with the separation of the early supercontinents, Pangaea and Gondwana. As variations in the climate caused the development of harsh, arid, desert environments, both plant families experienced convergent evolution in order to adapt and survive. Cacti and Euphorbias both converged on similar forms and metabolisms after prolonged exposure to corresponding environments, due to the fact that similar biomes can require the same adaptations.
Adaptations
Branching Stems Covered In Longitudinal Ribs Smaller leaves And Short Spines Spreading, Shallow, Fibrous Root System Water Storage System - Succulent Stems Crassulacean Acid MetabolismHope u will understand this
Would you say glucose or sucrose is more complex why
Sucrose is considered more complex than glucose because it is made up of two different sugar molecules bonded together.
Explanation:Glucose and sucrose are both carbohydrates, but they have different structures and properties. Glucose is a monosaccharide, which means it consists of a single sugar molecule. Sucrose, on the other hand, is a disaccharide composed of two monosaccharides - glucose and fructose - bonded together. In terms of complexity, sucrose is considered more complex than glucose because it is made up of two different sugar molecules.
Which of these is a positive effect of climate change on organisms?
O
A. Reduces atmospheric oxygen
O
B. Provides new habitats
O
C. Reduces niche size
O
D. Increases ocean acidity
SUBMIT
Answer:
Provides new habitats
Explanation:
AP!X STUDENTS
The positive effect of climate change on organisms is that it provides new habitats. The correct option is B.
Climate change can lead to changes in temperature, precipitation patterns, and other environmental conditions.
These changes may lead to the establishment of new habitats or modifications to existing habitats, which may have an influence on many creatures in both good and negative ways. In this instance, the beneficial outcome is the creation of new habitats.
As climate patterns shift, certain regions may become more suitable for certain species or ecosystems.
For example, as temperatures warm in certain areas, species that were previously limited by colder temperatures may be able to expand their ranges or colonize new areas.
This expansion of suitable habitats can provide opportunities for increased biodiversity and ecological resilience.
Thus, the correct option is B.
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Which of the following changes on a daily basis
•a shoreline
•a shore
•a beach
•a coast
Answer:
A shore line
Explanation:
Because in a warmer day it goes up to the sand more than it does in the winter
What tools give scientist the best data to study ice loss near the poles?
A.Satellite measurements
B. Argo floats
C. Air bubbles trapped in ice
D. I’ve core samples
Satellite measurements give scientist the best data to study ice loss near the poles. So, the correct option is (A).
What is Satellite temperature measurement?Satellite temperature measurements are defined as the temperature of the atmosphere at different altitudes as well as the sea and land surface temperature obtained from radiometric measurements by satellites.
Satellites do not measure temperature directly because they measure radiation in different wavelength bands, which must be mathematically inverted to obtain indirect references to temperature, where the resulting temperature profiles are used to derive temperature from radiation which depend on the details of the methods involved.
Thus, Satellite measurements give scientist the best data to study ice loss near the poles. So, the correct option is (A).
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The correct option is A i.e. Satellite measurements
Satellite measurements, air bubbles trapped in ice, and ice core samples are essential tools for studying ice loss near the poles.
Scientists can analyze ice loss near the poles with the greatest data available thanks to satellite monitoring. These instruments allow for precise and continuous monitoring of ice sheets and glaciers from a distance.Air bubbles trapped in ice also play a crucial role in studying past climate conditions. By analyzing the composition of these bubbles, researchers can gather important information about temperature and atmospheric conditions in the past.Ice core samples provide a direct record of historical climate data. By drilling into ice sheets, scientists can extract cores that contain valuable information about past environmental conditions and fluctuations.similarities and differences between these two topics. Compare and contrast the
usefulness of scientific research on our society with the usefulness of space research on
our lives on Earth
Scientific research and space research both contribute significantly to human knowledge and technological advancement. However, scientific research, covering diverse fields, more directly impacts daily lives, including health and environmental sustainability. Space research, while often viewed as abstract, provides unique benefits, including technological applications like GPS, weather prediction, comprehension of our universe, and a backup survival plan for humanity.
Explanation:Both scientific research and space research have immense importance for our society. Similarities between these two stem from the fact that they both push the boundaries of human knowledge, bring technological advancements, and have potential to radically improve our lives.
However, their usefulness differs in context. For instance, scientific research revolves around various fields such as medicine, physics, chemistry, etc., producing insights which directly affect our everyday lives (such as development of new medicines or sustainable technologies). On the other hand, space research, while sometimes seen as a more abstract application of science, delivers distinctive benefits. It leads to the development of new technologies (GPS, weather prediction, broadcasting) that we commonly use, contributes to our understanding of the universe, and even provides a contingency plan for human survival in case the conditions on earth become unsustainable.
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Tracy mixed cyclohexane and ethanol in a test tube. Calculate the angle of refraction of 26.8° light shines from the ethanol into the cyclohexane. The indices of refraction for cyclohexane and ethanol are 1.43 and 1.37, respectively.
Answer:25.4
Explanation:because i got it correct
To find the angle of refraction when light passes from ethanol to cyclohexane, you use Snell's Law with the given indices of refraction and the angle of incidence. Calculate sin(θ2) and then use the inverse sine function to find the angle of refraction (θ2).
Explanation:To calculate the angle of refraction of light passing from ethanol into cyclohexane, we can use Snell's Law, which is n1 × sin(θ1) = n2 × sin(θ2), where n1 and n2 are the indices of refraction of the two media, and θ1 and θ2 are the respective angles of incidence and refraction. Given that the index of refraction of ethanol (n1) is 1.37 and that of cyclohexane (n2) is 1.43, and the angle of incidence (θ1) is 26.8°, we can solve for the angle of refraction (θ2).
Applying Snell's Law:
1.37 × sin(26.8°) = 1.43 × sin(θ2)
First, calculate the sine of the angle of incidence and then divide by the index of refraction for cyclohexane to find the sine of the angle of refraction:
sin(θ2) = (1.37 × sin(26.8°)) / 1.43
After calculating sin(θ2), use the inverse sine function to determine the angle θ2, which is the angle of refraction.
Substitute the values into the equation and solve for the angle of refraction (calculations not shown here as they require a calculator).