Which sources do scientists use to study ancient climates? Check all that apply.

Earth’s orbit
tree rings
volcanoes
pollen grains
fossils

45% is the answer for your question

45% is the relative humidity if the dry-bulb temperature is 16°C and the wet-bulb temperature is 10°C.

Psychrometer is a device that use to calculate the relative humidity and dew. It has two thermometer, one measures the dry temperature while another measures the wet-temperature.

The amount of water vapor in the air, represented as a proportion of the highest quantity of water vapor the air could contain simultaneously temperature, was known as humidity levels, referred as relative humidity.

Calculation of relative humidity.

It can be calculated as:

Relative humidity = Actual vapor / saturation vapor density × 100

Relative humidity = 14 / 18 × 100

Relative humidity = 0.7777 × 100

Relative humidity = 77%.

Therefore, the relative humidity will be 77 %, and 45% is the relative humidity if the dry-bulb temperature is 16°C and the wet-bulb temperature is 10°C.

To know more about relative humidity on:

brainly.com/question/22069910

#SPJ5

Answer by YourHope:

Hi! :)

How does the speed of sound change as it moves from the surface of the ocean to 1000 meters below to surface?

D.) The speed decreases because at cooler temperatures the water has less mechanical energy!

:)

After about 1,000 meters, the increasing pressure compensates for the cold temperature, and the more dense water increase the speed of sound again. That should explain the answer :)

The Chesapeake Bay Watershed drains water into the Pacific Ocean.  This statement is false.

The Chesapeake Bay Watershed is in the states of Virginia and Maryland.  Those are on the east coast of the United States.    These would drain into the ocean on the east coast.  The Altantic  Ocean is on the east coast.  The Chesapeake Bay Watershed drains water into the Atlantic Ocean.

Hi!

Answer:

False

Why:

The Pacific ocean is on the west coast of the U.S. while chesapeake bay is on the east coast of the U.S. Which makes the question false.

Hope This Helps :)

write if you look like your mom or dad and how they look like to you

The high specific heat of the water allows the restriction to the change in temperature.

The specific heat can be defined as the energy required for raising one degree Celsius of one-unit mass of the matter. the water is known to have a specific heat. The high specific heat of the water allows the water to absorb a large amount of eat or other form of energy and the temperature is not changed very much. this property of water makes it fit for survival of the organisms, especially the aquatic ones.  

Answer:

Its high specific heat

Explanation:

Genes are the units of heredity predicted by Mendel. An allele is a variant of a gene that determines specific traits. Homozygous recessive genotypes display recessive phenotypes while heterozygous do not. Recombinant chromosomes, resulting from crossing over during meiosis, contain new pairs of alleles. Genes that do not assort independently are said to be linked. A gene codes for a specific trait. Most sex-linked genes are on the X chromosome, and females are more likely to exhibit these traits than males.

11. Mendel predicted that there are “units of heredity” which we now call genes.

12. A version or variant of a gene that produces a specific trait is called an allele.

13. A recessive phenotype can only be displayed if the genotype is homozygous recessive, not heterozygous.

14. The chromosomes that underwent crossing over during meiosis are called recombinant chromosomes, because they contain a region that has recombined to form a new pair of alleles.

15. When genes do not assort independently, the genes are said to be linked on the same part of the chromosome so they get passed on together.

16. A gene is a segment of DNA on a chromosome that codes for a particular trait.

17. Most sex-linked genes are on the X chromosome, simply because they are built of much more DNA. However, females are more likely than males to exhibit sex-linked traits.

https://brainly.com/question/37220922

#SPJ3

Mice don't have large litters, so the sample size was not large enough.

Sample size is important in a research study:

The sample size was insufficient because mice don't have huge litters.

learn more about sample size here: https://brainly.com/question/24158610

#SPJ2

The most logical contributing factor for the endangered status of black-footed ferret is Human encroachment. Farmers and ranchers (with government assistance) eliminated many prairie dogs because their underground complexes were destructive to fields. This led to decrease in the prairie dog populations, the primary prey of black-footed ferret.

Answer:

b) human encroachment that has greatly reduced the prairie dog populations

Explanation:

i just did it on usatestprep and got it right

The part of plants that contains structures needed to absorb sunlight and carbon dioxide is the chloroplast. Chloroplast would be the part in a plant to where it would absorb and be attracted by sulight and carbon dioxide.

Answer:

When a person receives a transplant, the immune system recognizes the transplanted organ as foreign. This is because the immune system discovers that the antigens in the cells of said transplanted organ are different. This non-compatibility triggers a transplant rejection.

Explanation:

The immune system protects the body from harmful substances such as microorganisms, toxins, etc. These substances have proteins known as antigens, which cover their surface. When these antigens are inside the body, the immune system recognizes that they do not belong to the body and attacks them. This happens in the case of transplants. To prevent this, doctors check both the donor and the person who will receive it. This typification ensures that the organ is as equal as possible to the tissues of the organ's recipient.

"The correct answer is that the donated organ contains foreign antigens that can trigger an immune response in the recipient's body.

When an organ is transplanted from one individual to another, the recipient's immune system recognizes the donated organ as foreign due to the presence of different antigens on the cells of the organ. These antigens, which include major histocompatibility complex (MHC) molecules among others, are proteins that are unique to each individual and are used by the immune system to distinguish between self and non-self.

The immune system's natural response to the presence of foreign antigens is to mount an attack to eliminate what it perceives as a threat. This response, known as the immune rejection, can damage or even destroy the transplanted organ if not properly managed.

To prevent rejection, transplant patients are given immunosuppressive drugs that reduce the activity of the immune system. These drugs help to protect the donated organ by decreasing the immune response against the foreign antigens, thereby reducing the risk of rejection and improving the chances of a successful transplant.

In summary, drugs to reduce the risk of rejection are given to organ transplant patients because the donated organ contains foreign antigens that would otherwise trigger an immune response leading to rejection of the organ. Immunosuppressive therapy is essential in managing this response to ensure the survival of the transplanted organ within the recipient's body."

Final answer:

The scenario that would most likely NOT lead to speciation is when neighboring herds of elk misinterpret each other’s mating behaviors, causing them to fight instead of mate.

Explanation:

The scenario that would most likely NOT lead to speciation is B) Neighboring herds of elk misinterpreting each other’s mating behaviors, causing them to fight instead of mate.

Speciation occurs when populations of the same species become reproductively isolated from each other, leading to the formation of new species. This can happen through various mechanisms such as geographic isolation, genetic mutations, or behavioral differences.

In the given scenario, although the elk herds may experience some disruption in their mating behaviors, it is not likely to result in reproductive isolation and the formation of new species. It is possible that the herds may eventually adjust their behaviors and successfully mate, maintaining genetic continuity within the same species.

cells, tissues, organs, organ systems

The function of an organ system depends on the integrated activity of its organs

Heyy There,

The negatively charged DNA can be pulled toward the positive field of the gel. 6. Explain how an agarose gel can separate DNA fragments of different lengths. Smaller fragments move faster, and therefore further, than larger fragments as they snake through the gel.

Have a nice day and good luck to u!!!!

DNA that is negatively charged can be drawn in that direction toward the gel's positive field. As they move through the gel, smaller fragments travel further and faster than larger fragments.

Agarose gel is a type of gel that is prepared from agarose particles. It is set in a container by adding warm water to it. A three-dimensional block is prepared which contains pores and channels to pass out biomolecules.

DNA is a genetic material that is a long fragment of bases and a hydrogen backbone. They are separate in agarose gel electrophoresis. When an electric current is given to the gel, the molecules move according to their size.

Thus, agarose gel separates the different sizes of fragments, as smaller fragments move faster than the larger fragments.

To learn more about agarose gel, refer to the link:

https://brainly.com/question/13052262

#SPJ2

The correct answer is option E, that is, organismal cloning.  

The procedure of generating genetically similar individuals of an organism either artificially or naturally is known as cloning. The reproductive cloning or organismal cloning is the process of producing a novel multicellular organism, genetically similar to another. Primarily, this kind of cloning is an asexual reproduction process, where inter-gamete contact or fertilization do not occur. Thus, the process is most closely similar to the formation of twins.  

If oxygen is present, the pyruvate molecules move to the mitochondrial matrix

The correct answer is option C, that is, 41 degrees.  

The time and temperature are the most essential elements for monitoring the growth of disease-causing bacteria in food. The temperature danger zone lies in between 40 degrees F and 140 degrees F. It is recommended to keep the hot food hot and cold food cold, and there is a need to use the thermometer in order to check the temperatures of the food.  

The potentially hazardous foods must go through the temperature danger zone as briskly as possible. The maximum temperature for holding cold, potentially hazardous food is 41 degrees F.  

The maximum temperature for holding cold, potentially hazardous food is 41 degrees. This is to prevent the growth and multiplication of bacteria and other harmful microorganisms.

The question is, 'What is the maximum temperature for holding cold, potentially hazardous food?' The correct answer is C. 41 degrees. The concern with cold, potentially hazardous food is the growth of bacteria and other microorganisms.

Microorganisms can multiply at temperatures above refrigeration and below minimum cooking temperatures. Refrigerated products, such as potentially hazardous food, should ideally stay within a temperature range of 0 °C to 7 °C as these temperatures hinder bacterial growth. However, if necessary, such products can be held at temperatures up to 41°F (5°C), beyond which the risk of bacterial growth significantly increases.

https://brainly.com/question/33737229

#SPJ3

The shadow zone is the area of the earth from angular distances of 104 to 140 degrees from a given earthquake that does not receive any direct P waves. The shadow zone results from S waves being stopped entirely by the liquid core and P waves being bent (refracted) by the liquid core.

The P-wave shadow zone is an area where seismic P-waves cannot be detected, caused by their refraction when passing from the mantle into the Earth's liquid outer core. Both P-waves and S-waves are affected by the liquid core, causing seismic shadow zones.

The P-wave shadow zone is a specific area of the Earth, located more than 104 degrees from an earthquake's epicenter, where P-waves (primarily longitudinal seismic waves) cannot be detected. It's caused by the refraction, or bending, of these waves while going through different layers of the Earth's interior, specifically the transition from the solid mantle to the liquid outer core. This bending prevents P-waves from recording at seismograph stations situated within this shadow zone.

Even though P-waves travel faster than S-waves (transverse waves), they are both affected by the Earth's liquid core. S-waves cannot be supported by the liquid core at all, causing a separate shadow zone, while P-waves can transverse it, but are refracted, causing their shadow zone.

https://brainly.com/question/33142177

#SPJ11

The right option is; d. Immune system

The immune system is responsible for defending the body against harmful substances.

The immune system is the body’s defense system that protects the body against infectious pathogens and other invaders. The immune system is composed of many biological structures (special cells, proteins, tissues, and organs) and processes that functions together to protect the body. White blood cells are one of the important cells of the immune system that destroy harmful substances or disease-causing organisms that invade body systems.

Synthesis is when they are not dividing

Cells not dividing are in the G0 phase, a quiescent state where they remain inactive until certain conditions or signals prompt them to enter the G1 phase; some cells may remain in G0 permanently.

Cells that do not divide, such as mature nerve cells or muscle cells, or cells that divide only under certain conditions, are said to be in the G0 phase (pronounced 'G-zero'). In this phase, cells are in a quiescent (inactive) state, having exited the cell cycle. Certain cells may temporarily enter the G0 phase due to environmental conditions or lack of growth signals, and will only proceed to the G1 phase upon receiving an external trigger. Cells like mature cardiac muscle cells and nerve cells may remain permanently in the G0 phase, ceasing to divide.

Ans.

Detergents are chemical compounds having both polar and non-polar components. They cause disruption of lipid molecules by breakdown bonds present between lipid molecules. In a cell, lipids are majorly present in cell membrane and membranes of internal cell organelles.

Thus, 'the cell part that would most likely suffer due to exposure to high concentration of lipids is cell membrane.'

The corn will be able to repel disease and insects that would otherwise be able to damage or kill the corn plant. The corn will not require any pesticide to do this, so it saves the grower of that corn money that would have been spent on pesticide.

Answer:

B) It is more efficient and economical to grow this variety.

Explanation:

Experimental studies generally use the before/after control/impact design. In this approach, an experimental area is trawled and compared before and after trawling (before/after comparison) and with a site that has not been trawled recently (control/impact comparison). This design often involves direct sampling of fauna, video observations, and sonar scans of the control and disturbed sites.

Answer:

It decreases biodiversity by harvesting everything in its path, so that unwanted fish are unnecessarily killed.

Explanation:

Trawling is the method of fishing with the help of using a trawl net which is pulled by a boat. This method of fishing traps everything that comes in its path.

While marine biodiversity refers to the number of different species present in a particular ecosystem.

Since trawling catches everything which comes in its path so a lot of unwanted species also get caught, thus affecting the marine biodiversity.

The proteins are synthesized by the ribosomes through the process of translation and are located in the lumen of the cisternae in the rough endoplasmic reticulum. These proteins are then pinched off from the cisternae in the form of vesicles. Vesicles are the small, membrane-enclosed envelops produced by the endoplasmic reticulum and the Golgi apparatus. They are then carried to the Golgi apparatus, where in, they are packed and transported out by the secretory vesicles pinched by the Golgi. It is delivered to the cytoplasm and reaches the cell membrane of the cell where they are released outside the cell. Lysosomes digest and recycle the waste materials produced in this process.  

Proteins synthesized in a cell go through a series of processes to be packaged, modified, and exported. They start in the endoplasmic reticulum, where modifications and packaging into vesicles occur. The vesicles then travel to the Golgi apparatus for further modifications and sorting before being transported to the cell membrane for exocytosis.

Proteins synthesized in a cell undergo a series of processes to be packaged, modified, and exported out of the cell. First, the newly synthesized proteins are transferred into the endoplasmic reticulum (ER), where they undergo modifications such as folding and the addition of sugar molecules. The ER also packages the proteins into vesicles, which are then transported to the Golgi apparatus.

In the Golgi apparatus, proteins undergo further modifications and sorting. They are packaged into different types of vesicles, depending on their final destination. The vesicles then bud off from the Golgi apparatus and are transported towards the cell membrane.

Once the vesicles reach the cell membrane, they fuse with it, allowing the proteins to be released outside of the cell. This process is known as exocytosis. The proteins are then free to carry out their functions in the extracellular space or in other cells.

https://brainly.com/question/2935246

#SPJ3

Raya's experiment involves an independent variable (altitude), a dependent variable (plant growth), and controlled variables to study the effect of altitude on plant growth.

In Raya's experiment, the independent variable is the altitude or the floor level in the 20-story building where she places the plant samples. She manipulates this variable to create different altitudinal conditions. The dependent variable is the growth of the plant samples, which she measures through various parameters.

To ensure the experiment's reliability, Raya controls other factors that could potentially impact plant growth, such as plant species, light exposure, temperature, humidity, and watering frequency. By keeping these variables constant or controlled, she can attribute any differences in plant growth to the altitudinal variations, helping her assess whether higher floors in the building affect plant growth differently than lower ones.

To learn more about plant follow the link:

https://brainly.com/question/31220793

#SPJ3

The insertion of human DNA into bacterial cells enables these cells to produce medicinal proteins such as insulin and clotting factors, advancing the treatment of genetic diseases and revolutionizing biotechnology.

The insertion of a human DNA fragment into a bacterial cell can transform the bacterium into a tiny factory that produces medicinal proteins. This process, enabled by recombinant DNA technology, involves introducing a desired piece of DNA into a bacterial host using plasmids or bacteriophages as vehicles. Once inside, the foreign DNA can lead to the production of insulin, clotting factors, enzymes, hormones, vitamins, antibodies, and vaccines, significantly advancing the treatment and potential cures for various genetic diseases.

Examples of successful applications include the synthesis of tissue plasminogen activator in E. coli to aid heart attack victims and vaccines against diseases like hepatitis B. The technique not only contributes to medicine by producing vital therapeutic proteins but has also revolutionized biotechnology by allowing for precise genetic modifications.

The answer to the blank space in the question is (D) all of these choices are correct.

Undernutrition will impact the immune system adversely since the body cannot fight off the infections due to the lack of nutrients. While, over nutrition and excessive iron intake would cause an imbalance to the body which would also influence the immune system negatively. Thus, all these options would be harmful to the immune system.

in 1845 was around the time the industrial revolution began, so when this happened the black smoke coming from the factories turned most of the trees a darker color. which in turn caused a population shift since the dark peppered months were now the ones less frequently preyed on.

No black peppered moths have been found before 1845,

Thus, No black peppered moths have been found before 1845,

Learn more:

https://brainly.com/question/1232420

B) Changes and recyclers Earth's rocks

In earth, there a 3 kinds of rocks available namely volcanic, sedimentary, and igneous. These diverse rock types can be changed into each other.

Sedimentary rock can wind up molten, transformative or another sedimentary rock, igneous rock can end up volcanic, sedimentary or another changeable rock and molten rock can end up sedimentary, transformative or another volcanic rock. This type of interconversion is explained by rock cycle.  

This conversion occurs through natural phenomenon such as erosion, melting, weathering, effect of heat and pressure, etc.

The correct answer is option E.The  gemstone cycle is a natural,  nonstop planetary process that involves the  conformation and  metamorphosis of  jewels. It operates through mechanisms  similar as riding ,  corrosion, deposit, and heat or pressure changes, cycling material between igneous, sedimentary, and metamorphic  jewels.

The Rock Cycle  

The  gemstone cycle is a natural and  nonstop process that describes the  conformation, breakdown, and reformation of  jewels. This cycle can involve changes below and  over Earth's  face and is driven by both Earth's internal heat and the sun's energy. The cycle includes three main types of  jewels  Igneous  gemstone- Formed from the cooling and solidification of magma or lava.  Sedimentary  gemstone- Made from the  contraction of sediments which can include  fractions of other  jewels and organic material.  Metamorphic  gemstone- Created when being  jewels are altered by heat, pressure, or chemical processes.  These  gemstone types are  connected as igneous  jewels can break down into sediments that may form sedimentary  jewels, or they can be  subordinated to conditions that change them into metamorphic  jewels. also, sedimentary and metamorphic  jewels can be  upraised and eroded or subducted and melted to begin the cycle  again as magma.  The processes of the  gemstone cycle include riding ,  corrosion, deposit,  contraction, crystallization, and metamorphism. It's important to understand that this cycle doesn't destroy  jewels but rather recycles them, and it can take hundreds to millions of times for these changes to  do.