Two decades after the Emerald River Dam was built, none of the eight fish species native to the Emerald River was still reproducing adequately in the river below the dam. Since the dam reduced the annual range of water temperature in the river below the dam from 50 degrees to 6 degrees, scientists have hypothesized that sharply rising water temperatures must be involved in signaling the native species to begin the reproductive cycle.

Which of the following statements, if true, would most strengthen the scientists’ hypothesis?
(A) The native fish species were still able to reproduce only in side streams of the river below the dam where the annual temperature range remains approximately 50 degrees.
(B) Before the dam was built, the Emerald River annually overflowed its banks, creating backwaters that were critical breeding areas for the native species of fish.
(C) The lowest recorded temperature of the Emerald River before the dam was built was 34 degrees, whereas the lowest recorded temperature of the river after the dam was built has been 43 degrees.
(D) Nonnative species of fish, introduced into the Emerald River after the dam was built, have begun competing with the declining native fish species for food and space.
(E) Five of the fish species native to the Emerald River are not native to any other river in North America.

Explanation:

some pesticides make them reproduce faster

The correct answer is B. She was measuring a rate of change.

Explanation

A linear graph is a type of graph that contains a series of data represented by points joined by linear segments, which allow you to quickly check the change in the trend of the data. Therefore, inline graphs quantitative variables are usually used to see their behavior over time. According to the above, Anjuli had to use a linear graph to express the information in the graph more clearly, because the data that he was using in his graph were quantitative variables. Also, she wanted to express the respiration rate of the yeast per minute. According to the above, the correct answer is B. Ella She was measuring a rate of change.

Answer:

--> French fries are digested in the intestine, breaking them into smaller molecules.(Catabolic process)

--> A body builder exercises to build muscles through protein synthesis. (Anabolic process)

--> A child eats a milkshake, which provides her with energy (catabolic process).

Explanation:

CATABOLISM is the process by which living organisms break down large or complex molecules into smaller molecules with the release of energy for their own use. Foods that we consume contains different nutrients which includes carbohydrates, fats &oil, and protein. These nutrients are made available for our body cell use and maintenance through the process of catabolism. Through catabolic processes, these nutrients are broken down into its smaller constituents with the release of energy which is used immediately to power molecular machines that support cell, tissue, and organ function. The following are examples of a catabolic process as it involves breakdown:

--> French fries are digested in the intestine, breaking them into smaller molecules and

--> A child eats a milkshake, which provides her with energy

In contrast, anabolic process involves the building up larger molecules from smaller ones. It uses ATP molecules generated by catabolic reactions as a form of energy to create new molecules that form new cells and tissues, and revitalize organs. For example, muscles can be built from the synthesis of proteins. This is also called anabolic training.

French fries are digested in the intestine, breaking them into smaller molecules - Catabolic process

A body builder exercises to build muscles through protein synthesis - Anabolic process

A child eats a milkshake, which provides her with energy - Catabolic process

Catabolism can be defined as the break down of larger molecules into smaller ones in a series of metabolic pathways of which the energy produced undergoes oxidation and then is released or it is used in another reaction. Digestion is an example of a catabolic process i.e. French fries are digested in the intestine, breaking them into smaller molecules. A child eating a milkshake, which provides her with energy (energy is produced) is a catabolic process.

Anabolism involves the build up of molecules from smaller molecules usually needed for bodily functions. Protein synthesis is an anabolic process (buildup from small amino acids to large proteins. A body builder exercises to build muscles through protein synthesis is an example of anabolism

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Answer: Biosynthesis is a multi-step, enzyme-catalyzed process where substrates are converted into more complex products in living organisms. In biosynthesis, simple compounds are modified, converted into other compounds, or joined together to form macromolecules. This process often consists of metabolic pathways.

Answer:

    There are several actions that not only humans have done to cause mass extinction. There are things such as poaching which is simply killing large and rare animals for horns, fur, meat, tusks, etc. These parts can be sold for money or resources. When one type of animal has characteristics of parts that give the poacher lots of wealth, herds or single animals can be tracked down and killed. The number of these animals dwindle down, and if nothing is done to help the animal, it goes extinct.

   But things such as nature itself that can cause extinction where humans can do nothing about. For instance, a frog species called "Splendid Poison Frog " has gone extinct for a certain type of fungus that wiped the entire species out, where we can't do anything about.

There are many results on mass extinction, but these two are some that are caused.

Hope this helped.

Answer:

1. It grows and develops

2.  Unicellular organisms have a cell membrane made from a lipid bilayer; viruses have a protein coat.

3. A virus injects its genetic material into the host cell, copies itself, and then forms new viruses that burst out of the host cell.

4. The host cell is destroyed during the lytic cycle.

5. They should get the flu vaccine because their bodies do not build up resistance.

Explanation:

These are the answers I chose from when i did it  10 minutes ago, they wont let me go back to the quick check to confirm it, but this was the best I could do.

The trait of living things that's depicted by a virus that mutates is that it evolves.

The difference between a virus and a unicellular organism is that Unicellular organisms have a cell membrane made from a lipid bilayer; viruses have a protein coat.

The lytic cycle is when a virus injects its genetic material into the host cell, copies itself, and then forms new viruses that burst out of the host cell.

The difference between the lysogenic cycle and the lytic cycles is that the host cell is destroyed during the lytic cycle.

The reason why doctors recommend people, especially the elderly and those with weak immune systems, get the flu vaccine every year is because they should get the flu vaccine because viruses mutate.

It should be noted that when a virus mutates, it shows its ability to evolve. In such a case, there's transformation and development regarding the virus.

People are advised to get the flu vaccine every year because viruses mutate. In this case, getting the flu vaccine will help protect the person from the virus.

Getting a flu vaccine is vital especially for the people that have a low immune system as well as for the older people who are already weak.

In conclusion, the correct options are B, C, D, B, and A.

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Answer:

D

Explanation:

i think this is the answer because the nucleus contains threads of DNA called chromosomes.which can help in a genetic experiment.

I hope this helps

In the given context, Nucleus would help in obtaining the copies of the gene.

The nucleus controls and regulates the activities of the cell and carries the genes, structures that contain the hereditary information.

In cell biology, the nucleus is a membrane-bound organelle found in eukaryotic cells.

The nucleus was discovered by Robert Brown in 1831.

Nuclear DNA is a multiple long linear molecules in a complex with a large variety of proteins, such as histones, to form chromosomes. The genes within these chromosomes are structured in such a way to promote cell function.

The nucleus maintains the integrity of genes and controls the activities of the cell by regulating gene expression and thus control the center of the cell.

The main function of the cell nucleus is to control gene expression and mediate the replication of DNA during the cell cycle.

Nucleus houses an organism’s genetic code, which determines the amino acid sequence of proteins critical for day-to-day function, it primarily serves as the information center of the cell has been found that replication happens in a localized way in the cell nucleus.

A ribosome is a complex molecular machine found inside the living cells that produce proteins from amino acids during protein synthesis or translation. The process of protein synthesis is a primary function, which is performed by all living cells.

Ribosomes are specialized cell organelles and are found in both prokaryotic and eukaryotic cells. Every living cell requires ribosomes for the production of proteins.

This cell organelle also functions by binding to a messenger ribonucleic acid (mRNA) and decoding the information carried by the nucleotide sequence of the mRNA.

They transfer RNAs (tRNAs) comprising amino acids and enter into the ribosome at the acceptor site. Once it gets bound up, it adds amino acid to the growing protein chain on tRNA.

Mesosome is formed by an extension of the plasma membrane into the cell wall. These extensions are usually in the form of vesicles, tubules, and lamellae.

The main use of mesosomes are:

- Synthesis of a cell wall.

- DNA replication.

- Distribution of daughter cells, respiration, secretions, etc.

Plastids are double-membrane organelles which are found in the cells of plants and algae.

Plastids are responsible for manufacturing and storing of food. These often contain pigments used in photosynthesis and different types of pigments that can change the color of the cell.

Different types of plastids with their specialized functions are:

- Chloroplasts

- Chromoplasts

- Gerontoplasts

- Leucoplasts

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Answer:

Physical trauma, acute disease, chronic disease, infectious disease and emotional trauma.

Explanation:

Physical trauma, acute disease, chronic disease, infectious disease and emotional trauma are the ways from which health should be affected by happening of natural disasters such as earthquake and cyclones. We are able to predict the weather with the help of satellites that monitors the movement of clouds on the earth atmosphere. Advancement of technology is the main reason which enable us to predict the weather conditions as well as the coming of cyclones in a specific region.

A possible outcome of global warming is that hurricanes and other extreme weather events may increase. Therefore, the correct statement is option A.

The gradual rise in the Earth's atmosphere's average temperature that results from the buildup of greenhouse gases, primarily carbon dioxide, released by human activities like the burning of fossil fuels and deforestation is known as global warming.

The Earth's climate and weather patterns may alter as a result of this temperature rise, which might result in more frequent and severe weather events like hurricanes, floods, and droughts.

Due to alterations in precipitation patterns, increased pest pressure, and other factors, it is unlikely that most crops will grow more effectively in warmer climates. Because of the melting of glaciers and ice caps, sea levels are more likely to increase, resulting in floods in low-lying places.

Therefore, a possible outcome of global warming is that hurricanes and other extreme weather events may increase.

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Answer:

small rock

Explanation:

hope it's helpful

spider has no tail and has no stinger

Answer: its a spider

Explanation: cause it case a legs and it has two body regions

Answer:

8

Explanation:

Los 5 huesos que forman la base del cráneo son el etmoides, el esfenoides, el occipital, el frontal emparejado y el temporal emparejado. La base del cráneo se puede subdividir en 3 regiones: las fosas craneales anterior, media y posterior.

Espero que esto ayude

[tex] \hookrightarrow\large\sf \: Pepsin \: is \: an \: example \: of \: \boxed{\underline{\bf \: protease.}}[/tex]

Answer:

[tex]\boxed {\boxed {\sf A. \ Osmosis}}[/tex]

Explanation:

ATP or adenosine triphosphate is used as energy in all living organisms. It is required for many processes to keep an organism alive. We are looking for the process that does not require ATP.

A. Osmosis

Osmosis is the diffusion of water across a selectively permeable membrane. It is a type of passive transport, so there is no energy expenditure. ATP is not used, but we can check the other answer choices.

B. Healing a cut

Healing a cut requires transporting substances to the cut, inflammatory responses, and cell division to repair the cut. This does require ATP.

C. Keeping warm

To stay warm the body's blood vessels near the surface constrict so less heat is lost and the sweat glands are inactivated. This requires ATP.

D. Push ups

Push ups require many different muscles throughout the body and exercise requires lots of ATP.

The correct answer is Choice A. Osmosis.

Answer:

Im pretty sure its true ill coment latter to tell youif it is or not

Explanation:

Answer:

true

Explanation:

The results of an experiment can in fact be validated through replication

Answer:

The Gulf Stream affects London because C. It moves warm water north from the Gulf of Mexico, making London warmer than it should be at its latitude.

Explanation:

If it weren't for the Gulf Stream, London would have the same climate as Canada rather than New York. This is why latitude is not the only factor for an area's average temperature throughout a certain time of a year.

Answer:

plasmolysis is the shrinkage of protoplast from the cell wall under the influence of a hypertonic solution.this can be observed by placing the fresh filament of spirogyra in a 10% solution of common salt.the cell undergoes exomosis.

I hope this helps

Answer:

a

Explanation:

Answer:

the process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water.

Hey there!

Photosynthesis is the reaction that converts light energy to chemical energy in sugar and carbohydrates. Humans can't eat sunligh, so we eat the plants. Plants convert the energy in the sunlight into chemical energy using chlorophyll. Chlorophyll is a molecule produced by plants, algae and cyanobacteria, which aids in the conversion of light energy into chemical bonds. It is the reen pigment found in the chlorookasts of higher plants. They are a part of our ecosystem, and they are lower on the food chain.

Hope this helps! I promise I did not copy or anything like that from the internet.

Have a great day! :)

The question is solved using the equations of motion

According to the equations of motion:

[tex]v^2 = u^2 -2gh[/tex]

v = final velocity

u = initial velocity

g = acceleration due to gravity

h = height

Note that at the maximum height, the final velocity (v) = 0 m/s

so we can write:

[tex]u^2 = 2gh[/tex]

[tex]h = \frac{u^2}{2gh}[/tex][tex]h= \frac{100^2}{2 * 10}[/tex]

h = 500 m

The time taken is obtained from:

[tex]v= u - gt[/tex]

since v= 0 at maximum height

[tex]u = gt\\\\t= u/g\\\\t= 100/10\\t = 10 s[/tex]

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Answer: At low temperatures the fluidity of the membrane decreases and it favors fluidity. The higher the concentration of unsaturated fatty acids, the less tightly the phospholipids can bind and the more fluid (more permeable).

Explanation:

The plasma membrane is a lipid layer that delimits the entire cell, dividing the extracellular medium from the intracellular (the cytoplasm of a cell). They are composed of phospholipids, which are molecules composed of glycerol, a phosphate group and two lipid chains (such as fatty acids). Glycerol is a three-carbon molecule that functions as the backbone of this membrane. A geometry is formed that allows the phospholipids to line up side by side to form broad sheets. They are insoluble in water, but their unique geometry causes them to aggregate in layers without any energy input, as they possess a hydrophilic phosphate head and a hydrophobic tail consisting of the two fatty acid chains. The hydrophilic heads of the phospholipids in a bilayer membrane face outward and are in contact with the aqueous fluid inside and outside the cell. Because water is a polar molecule, it readily forms electrostatic (charge-based) interactions with the phospholipid heads.

Selective permeability is a property of the plasma membrane and other semipermeable membranes that allow only certain particles to pass through them. In this way, those particles that are needed by the cell can enter the cell and those that are not useful to the cell are prevented from entering. In the same way, the cell can eliminate the particles it has produced as waste. In this way, the entry and exit of substances through the membrane is regulated and the correct functioning of the cell is achieved.

For a particle to be able to cross the plasma membrane it must have a size equal to or smaller than the pores of the membrane, it must have the opposite charge to the charge of the membrane or simply have a neutral charge, and if it is larger than the pores it must be dissolved in a solution, decreasing its size and thus be able to enter the cell through the membrane.  

Plasma membranes are fluid and this fluidity depends on their lipid composition and temperature. Depending on the temperature, membrane lipids can be found in two different states or phases: gel (solid-like, with more rigid hydrocarbon chains) and liquid crystal (more fluid, with more mobile hydrocarbon chains). At low temperatures the fluidity of the membrane decreases and in these conditions the increase of its concentration favors fluidity. The temperature at which the transition from one state to the other occurs is the phase transition temperature (Tc). At values below Tc, the bilayer is in the gel state and at higher values it passes to the liquid crystal. It should be noted that there is an equilibrium between the gel state and the liquid crystal state and that the characteristics of the lipids of the bilayer condition the transition temperature. In the case of bilayers consisting of only one type of lipid, the Tc is well defined. But biological membranes are complex lipid mixtures and the transition from one state to another occurs over a range of temperatures. The presence of short-chain or unsaturated fatty acids reduces the transition temperature, while saturated fatty acids and the increase in the length of the hydrocarbon chains cause this temperature to rise. Then, phospholipids with unsaturated fatty acid tails cannot bind as tightly due to the bent structure of their tails. For this reason, a membrane of unsaturated phospholipids remains fluid at lower temperatures than a membrane of saturated phospholipids.  

The fluidity of a membrane is the ability of a molecule to move through it. In short, the higher the concentration of unsaturated fatty acids, the less tightly the phospholipids can bind and the more fluid (more permeable) the membrane will be even at low temperatures. However, at low temperatures the fluidity of the membrane decreases (lower permeability) but the effect will depend on the composition of the fatty acids. To determine the exact permeability, it is necessary to relate the concentration of unsaturated bonds and the length of the fatty acids in the phospholipids and the temperature.

Answer:

They produce identical daughter cells.

Answer:

cells in mitosis go through the PMAT stages twice to produce diploid cells while cells in meiosis go through PMAT stages once to produce haploid cells, is. the best answer

Answer:

The Answer is A.) Cells in mitosis go through the PMAT stages twice to produce diploid cells while cells in meiosis go through PMAT stages once to produce haploid cells.

Explanation:

Edge 2021

P.S Thank ❤️ And Rate ⭐️ My Answer If It Has Helped You.

A action that has came in result of an event

Answer:

option 1

Explanation:

Answer:

a and R

are correct

Explanation:

Answer:

Combustion

Explanation:

Combustion is the chemical reaction that happens when fuel burns.

Answer:

Calcium

Explanation:

Calcium is the healthy bone mineral. About 99% of the calcium in the body is stored in the bones and teeth. It's the mineral that makes them hard and strong. The remaining 1% is needed for many activities that help keep the body functioning normally.

Answer:

Phosphorus will strengthen her bones.

Explanation:

There are a wide number of dietary minerals that are involved in the strengthening of bones. But among all of them, calcium and phosphorus are the key minerals that play an active role in providing strength to the bones. Phosphorus keeps the bones healthy and strong. It also helps in the growth of bones.

Low amounts of phosphorus can lead to thinning of the bones, a disease termed as osteoporosis.

Answer:

bar graph can be easily converted to pie chart

Answer:

Clear cutting.

Explanation:

Clear cutting is the most efficient and less costly way to cut down the trees. This practice of cutting trees can harm an ecosystem by increasing erosion, sediment pollution of waterways, and losses in biodiversity that lives there before the cutting of trees. This clear cutting destroy the habitat of thousand of organisms and erosion of the productive layer of soil occurs that is depleted due to heavy rainfall and wind.