The phylogenetic chart describes how modern-day elephants (Asian elephants and African elephants) evolved from extinct species. Based on the chart, are Asian elephants more closely related to Mammuthus (mammoths) or Mammuts (mastodons)? Are Mammut mastodons the same species as Paleomastodons? Explain your reasoning for both questions.

Answer:

The model of water from paper clips can be made as follows:

1) As a water molecule has a single atom of hydrogen, we can place the single green paper clip in the center. This green paper clip will depict a hydrogen atom.

2) As two oxygen atoms are present in a molecule of water we can place each of the two yellow paper clips at the sides of the green paper clip. These yellow paper clips will depict the oxygen atoms.

The resulting mice will be induced with the changed gene either on or off. The offspring will have altered genes if both the alleles have the trait. This is a heritable change.

Explanation:

Making gene on or off is a process of gene regulation when one of the gene is methylated or histone modification to prevent access to transcription factors hence no expression of the protein. This process is called epigenetics.

The resulting progeny in mice will receive the allele of on or off the gene. Such genes with altered allele are also called as

The altered genes will be expressed in the resulting progeny of mice.

The epigenetic genes can be reverted with environmental effects in the offspring paramutable alleles. They are heritable.

Modifying genes in mice affects gene expression leading to potential changes in traits and behaviors in offspring.

When scientists modify the genes that are turned on or off (expressed) in mice, the offspring of these mice may exhibit changes in various traits or behaviors. This is due to the alteration of gene expression which can lead to different messenger RNAs being produced. The use of microarrays has allowed for the examination of these gene expressions in different conditions, such as the Tc1 mouse cells expressing human genes on chromosome #21.

Particularly, in knockout studies, researchers deactivate specific genes to observe changes in phenotype, such as behavior, health, and development. If the modified gene affects a trait that is heritable, then the offspring could also show these modified characteristics. Different studies, such as observing mice raised on a restricted diet, have shown that environmental factors can also influence gene expression and aging.

Answer:

Egg yolk is nucleus

The egg white is cytoplasm

The outside of the egg is plasma membrane

I will edit if I get it right after I finish my test

Ricky correlate egg yolk with nucleus and egg white is cytoplasm, outer covering with plasma membrane.

The plasma membrane is a thin selectively semi-permeable membrane an outer covering of a cell by surrounding cytoplasm.

The two major components are proteins and lipids where as the ratio of  protein to lipid in plasma membrane may vary depending on types of cells.

The most common lipids are phospholipid, others are sphingolipid, glycolipid in semi-permeable lipid bilayer.

Some organelles nucleus and mitochondria also have bilayer plasma membrane.

The function of cell membrane is to protect the integrity of the internal environment of the cell, act as a base of attachment for the cytoskeleton in some organisms resulted in support cell and maintain its shape.

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Answer:Bees Fly And snails Dont

Explanation: Logic

The Theory which supports the volcanic eruptions and earthquakes are Plate tectonics.

Explanation:

Answer:

C

Explanation:

i already took it mate

The independent variable in this experiment is the temperature, as it is the factor being changed to observe its effect on the rate at which bread turns moldy, which is the dependent variable.

In the described scenario, the independent variable is the factor that is changed or controlled to test the effects on the dependent variable, which is the rate at which bread turns moldy. The hypothesis provided states, "Bread turns moldy faster at higher temperatures," which predicts the outcome based on changes made to the independent variable. Therefore, the independent variable is temperature.

During the investigation, it is essential to keep other factors constant, such as the type of bread, the amount of moisture, and exposure to air, among others, so that they do not affect the outcome and interfere with the validity of the experiment.

Answer:

the electrical activity of the heart

Explanation:

Answer:

4,2,1,3,5

Explanation:

I believe this is right

Answer:

Explanation:

5,3,4,1,2

Option D: The myosin and actin would not connect, and the sarcomere would be unable to contract.

Explanation:

Muscle contraction takes place by sliding interaction and cross-bridge formation of the muscle filaments – actin and myosin present in the muscle fibers or sarcomeres. This interaction is called a sliding filament theory.  

Calcium is one of the main co-factors which regulate muscle contraction and relaxation. The two proteins which regulate muscle contraction – troponin, tropomyosin- require calcium to function.

Calcium acts along with troponin to facilitate binding of actin and myosin. When there is a lack of calcium, the binding of myosin and actin does not happen and the sarcomere cannot contract.  

Answer:

Which is a physical property?

Physical property include reactivity

Explanation:

Reactivity entails the reaction when compounds mix with each other, such reaction might be noticed by change in color, loss of water, among others

Answer:

1st. the chromosomes arrive at the cell poles

2nd.  the mitotic spindle disassembles

3rd. the vesicles that contain fragments of the original nuclear membrane assemble around the two sets of chromosomes

Explanation:

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During telophase, separated chromosomes arrive at opposite poles, decondense, and are encased in newly formed nuclear envelopes. Meanwhile, cytokinesis divides the cell's cytoplasm, resulting in the creation of two daughter cells.

During telophase, several critical events ensure the proper conclusion of cell division, whether it be mitosis or meiosis. One key event is the arrival of separated chromosomes at opposite poles of the cell. This repositioning is crucial for the equitable distribution of genetic material to daughter cells. As chromosomes reach these poles, they undergo decondensation, transitioning from tightly coiled chromosomes into a more relaxed chromatin state, making genetic material accessible for gene expression.

Simultaneously, the reconstruction of the nuclear envelope around these dispersed chromatids marks the re-establishment of distinct nuclear territories within the emerging daughter cells. This event is vital for the segregation and protection of the genetic material in preparation for the cell's return to the interphase state, where it resumes normal cellular functions.

In addition to these nuclear events, cytokinesis often commences during or shortly after telophase, culminating in the physical division of the cell's cytoplasm into two separate daughter cells. This process varies between organisms and cell types, with animal cells forming a cleavage furrow through the constriction of an actin ring, and plant cells forming a cell plate that will eventually develop into separate cell walls.

Answer:

longitude

Explanation:

The distance north or south of the equator, as measured in degrees is called latitude. The correct option is D.

Latitude is the term used to describe the distance north and south of the equator, expressed in degrees.

Latitude is used to calculate how far north or south of the Equator you are. It is calculated using 180 fictitious lines that are drawn in circles east-west along the equator.

Parallels are the names for these lines. An imaginary ring connecting all places that share a parallel is known as a circle of latitude.

The line at latitude 0 is known as the Equator. With 90 degrees north of the Equator and 90 degrees south of the Equator, each parallel is one degree north or south of the Equator.

Thus, the correct option is D.

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Your question seems  incomplete, the missing options are:

the prime meridian

the arctic circle

longitude

latitude

Answer: Translation

Explanation: Translation is a process in which an mRNA strand is copied into an amino acid sequence for protein synthesis. The first step in protein synthesis is the copying of a DNA molecule into a complimentary mRNA molecule in a process known as transcription. The mRNA is then converted to an amino acid sequence in the ribosome in a process known as translation.

Answer:

translation

Explanation:

(b)

Answer:

Deoxyribose sugar and phosphate groups

Explanation:

The Deoxyribose and phosphate groups are held together by hydrogen bonds. The Deoxyribose is also connected to the nucleic acids, making a complete nucleotide. Deoxyribose is only used in DNA, because DNA means Deoxyribonucleic Acid. RNA is made with a sugar called Ribose.

The two molecules that forms the backbone of DNA ladder are:

1. Deoxyribose

2. Phosphate groups

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Answer:

A. The gene for surface protein was transcribed and translated.

Explanation:

Because all living organisms use the same genetic code, it is possible to express genes from one organism in the other. In this case, the DNA sequence that corresponds to the hepatitis B surface protein gene has been inserted into the banana, and the protein is expressed.

For the protein to be expressed, the gene must have been successfully transcribed into an mRNA by the banana plant machinery. This mRNA has then been translated into a protein that means the hepatitis B surface protein is now present in the cell.

Charles Lyell's principle that the age of earth may be much older than once thought impressed upon Darwin.

Explanation:

Charles Lyell is one among the earlier thinkers whose studies influenced Darwin and he lived in the 1797-1875 period. while on his voyage in Beagle Darwin took the book of Charles Lyell, Principles of Geology with him.

In this book Lyell argues that the earth's surface was formed as a result of gradual geological processes indicating that the earth was much older than what many believed at that time.

Answer: it B for sure

Explanation: you grow because your cells divide

Answer:

your cells divide produceing new cells you get new cells everyday sence you ever exsisted

Explanation:

Answer:

D

Explanation:

Sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

Answer: It is D carbon dioxide, or dry ice; sublimation.

The Grassland and Forest biome crosses boundaries between different climate zones.

Biomes are areas with various climates and vegetation.

There are major five types of biomes present

The type of climate and the plant and animal species found there makes up a biome.

Thus, the Grassland and Forest biome crosses boundaries between different climate zones.

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Final answer:

Biomes such as tropical forests, deserts, and temperate forests cross different climate zones due to their characteristic climates and are found in multiple continents. Transitional areas called ecotones exist between biomes, and climate significantly influences biodiversity, generally increasing towards the equator.

Explanation:

Biomes are large geographical areas characterized by specific plant and animal communities that are adapted to the region's climate and environmental conditions. Biomes such as tropical forests, deserts, and savannas are found in different continents but are connected by common climatic features. For instance, tropical forests are prevalent in South America, Africa, Southeast Asia, and Australia, all areas close to the equator with high humidity and temperature. Deserts typically occur at the 30 degrees north and south latitude and are prominent in the Middle East, southwestern United States, and other regions with arid conditions. Temperate forests and grasslands are found in North America, Europe, and Asia, with moderate climates and varying precipitation.

One important aspect to understand about biomes is the presence of ecotones, which are transitional zones between two distinct biomes. Ecotones include a mix of plant and animal species from each adjacent biome and can be found between various biome types like desert and mountains or chaparral and polar ice. Within the North American context, the diverse climate and weather systems influence the distribution and characteristics of different biomes, with variations observed from west to east and from north to south.

The Axial portion refers to the central part of the body, encompassing the head, neck, and trunk. It houses vital organs like the brain, heart, and lungs. It's pivotal in studying human anatomy, particularly in biology or health sciences.

The Axial portion is a term used in anatomy and refers to the central part of the body, including the head, neck and trunk. It's essentially the main part of the body that houses critical organs such as the brain, heart, and lungs, among other components. It's often contrasted with the appendicular portion, which includes the appendages (limbs).

Understanding the axial portion of the body can be crucial for studying the human body, especially in terms of biology or health sciences. It allows you to easily locate specific organs and structures within the body, enhancing your understanding of bodily functions and processes.

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Answer:

Replicating an experiment _____.

A. increases validity

B. decreases validity

C. has no effect on validity

Answer: An element is a pure substance that can not be broken into smaller particles.

Explanation: An element may comprises of two or more atoms that are chemically embedded or combined together. Elements are building blocks of matter, they are mostly abundant in the universe e.g Oxygen, Hydrogen, Carbon.

Answer:an element is a pure substance, an element is made of only one type of atom, and an element cannot be broken down into a simpler form.

Explanation:

Answer: b). Two factors affect the height trait of pea plants. One of the factors is dominant over the other.

Explanation: All the offsprings are tall because each of them inherited one gene for tallness and one gene for shortness. The gene for tallness is dominant over the gene for shortness, and so the gene for tallness is able to express itself in the presence of the recessive gene for shortness.

See the attached punnet square for more information.

Final answer:

Mendel explained that the tall trait in pea plants is dominant over the short trait, so the tall trait appeared in all first-generation offspring when crossing a tall pea plant with a short one. This outcome demonstrated that each plant carries two hereditary factors for each trait, and the dominant factor determines the offspring's appearance.

Explanation:

Mendel crossed a tall pea plant with a short pea plant, and all the offspring in the first generation were tall pea plants. Mendel explained that two factors affect the height trait of pea plants, and that one of the factors is dominant over the other. Therefore, even though each plant in the F1 generation carried both tall and short factors, the tall factor was dominant, and thus all the F1 generation plants exhibited the tall height. This disproved the blending inheritance hypothesis of the time and laid the groundwork for our understanding of genetics with Mendel's Laws of Inheritance, specifically the law of segregation. Therefore, option b. Two factors affect the height trait of pea plants. One of the factors is dominant over the other is the correct answer.

A.

The ribcage expands to allow air to enter the lungs is an example of the skeletal system interacting directly with the respiratory system.

Explanation:

The skeletal system is mainly made up of bones - like the ribcage in this case - while the respiratory system is made up of the lungs, trachea, diaphragm, etc.  

When inhaling, the diaphragm contracts, therefore increasing the volume of the chest cavity. The muscles between the ribs also contract causing the ribcage to stretch upwards and outwards. This also contributes to an increase in the volume of chest cavity. Consequently, the pressure in the chest, decreases causing atmospheric pressure to rush  air into the lungs.

When these muscles contract, they raise the pressure in the chest cavity causing air to rush out of the lungs.

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Red-green color blindness is an X-linked trait.  

Explanation:

A red-green color blindness is a hereditary disease which occurs with inheritance of recessive X linked chromosomes, which depicts that the gene or allele causing this defect is presents on the X chromosome.

Since males can express the recessive gene with one copy of the X chromosomes, this defect is more common among men than women.

So even if a grandfather has this defect, this may get inherited by his grandson, while his mother might just be a carrier.

This is the reason why the baby boy inherited the red-green blindness from his father.

A statement of purpose in an experiment should explicitly outline what is to be accomplished during the experiment and the methods of data analysis.

The statement of purpose for an experiment designed to test a hypothesis should clearly define the objectives of the laboratory procedure and the subsequent statistical analysis. An example could be 'Perform an experiment that evaluates the impact of microwave power level and heating time on the temperature of water'. However, it must also encompass the analysis component, such as 'Then, compare the experimental value of 50% power to 100% power using a t-test at both 8 and 10 min to determine if the power level significantly impacts water temperature'.

The overarching goal of experimental science is to rigorously test the hypothesis, usually with an intention to disprove it, thereby enhancing the hypothesis's validity if it withstands the testing. This scientific process involves careful experimental design, including considerations for randomization, replication, and control of extraneous variables, precise data measurement, and meticulous experimentation to successfully achieve the objectives and draw reliable conclusions.

Experiments attempt to produce other observations that support or refute a theory or hypothesis. Hence the correct option is b.

The purpose of performing experiments is to test theories or hypotheses by generating empirical evidence that either supports or refutes them. Through experiments, scientists systematically manipulate variables and observe the outcomes to understand the underlying mechanisms or relationships between phenomena.

Experimentation allows researchers to gather data in a controlled setting, enabling them to draw conclusions about the validity of their hypotheses. By comparing the observed results with the predictions made by the theory or hypothesis, scientists can evaluate the accuracy and applicability of existing scientific models. Therefore, experiments serve as a crucial methodological tool in the scientific process, facilitating the advancement of knowledge and understanding in various fields of study. Hence the correct option is b.

Complete question:

Which of the following statements best describes the purpose of performing experiments? OA. Experiments are designed to produce unexplainable results. B. Experiments attempt to produce other observations that support or refute a theory or hypothesis. OC. None of the answers are correct. O D. Experiments can be replaced by logical reasoning based on the known facts. OE. Experiments are designed to produce the results predicted by a theory or hypothesis.

Answer:

During an investigation, the addition of radiolabeled amino acids during protein synthesis occurs when the data shows high levels of radiation in protein synthesis, packaging and transport, which is equivalent to saying that radioactivity levels would first increase in the rough endoplasmic reticulum, followed by the Golgi and then the secretory vesicles (option C).

Explanation:

Protein synthesis in the cell is a process that involves the formation of polypeptide chains with the successive incorporation of amino acids.

RNA, which contains the sequence of triplets or codons that form the genetic code, is coupled to the ribosomes. Each codon or triplet consists of three nucleotides and encodes specific amino acids.

The RNA chain contains a specific nucleotide sequence and determines the assembly of amino acids to a polypeptide chain, by the action of ribosomes present in the rough endoplasmic reticulum.

In the Golgi apparatus, the proteins formed are conjugated, with the addition of carbohydrates or lipids, and arranged in secretory vesicles for transport.

In these steps, where the labeled amino acids are present, the levels of radioactivity would increase in the rough endoplasmic reticulum, the Golgi apparatus and the secretory vesicles.

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Answer:

c is the answer

Explanation:

Answer:

1. Amber is made from tree resin.

2. All of the above

3. When a insect gets stuck in tree resin, the insect eventually becomes covered with the sticky resin. After millions of years, the resin hardens and becomes ember.