Hormones turn on, turn off, speed up, or slow down the
activities of organs and tissues.
true or false

Answer:

August 11, 2014 — Six years ago, the Norwegian coast guard filmed a Scottish fishing vessel riding gray swells, dumping 5 metric tons of dead fish back into the North Sea. Over the European Union catch quota, and so unable to keep all the fish they’d caught, the fishermen had to ditch some. To the Norwegians, who aren’t part of the EU and hold a strict discards ban, the waste was shocking.

When this news reached Dan Watson, a young British designer, it became the inspiration for SafetyNet, an ocean fishing net that allows certain fish to escape via lighted rings, offering more catch selectivity. The Scottish fishermen’s predicament, he believed, was driven by their lack of control. “There can be no villains, there can be no victims, there are just problems,” Watson says. “I started this project because I wanted to go some way towards solving that problem.”

Bycatch can result in overfishing, reduces the population of species that might already be endangered and, on the largest scale, interrupts food chains and damages whole ecosystems.

Watson joins a growing number of innovators designing more selective fishing gear to reduce bycatch — the unwanted fish, dolphins, whales and birds that get scooped up by longlines, gillnets and trawlers each year and then discarded. Globally, the amount of marine life that is wasted or unmanaged — which makes it potentially unsustainable — forms about 40 percent of the catch. “The way we catch now is to catch everything, decide what we want to keep, and discard the rest,” says Martin Hall, head of the bycatch program at the Inter-American Tropical Tuna Commission, which regulates tuna fishing in the eastern Pacific Ocean. Bycatch can result in overfishing, reduces the population of species that might already be endangered and, on the largest scale, interrupts food chains and damages whole ecosystems. It also amounts to an enormous waste of valuable fish protein.

Leatherback turtle caught in net

New fishing net designs aim to reduce bycatch — the unintented capture of small fish, turtles, dolphins, whales, birds and other ocean-going life. Photo by Michel Gunther/WWF-Canon.

To designers building better nets and lines, bycatch isn’t viewed as an inevitability, but as something we can phase out, piece by piece. It’s also seen as a battle that needs to be fought alongside fishermen, not against them.

Rethink the Game

Speaking from his trawler, the 45-foot Proud Mary, off the coast of Massachusetts, one such fisherman, Christopher Brown, says that over the years, fishermen have had to “rethink the game.” Brown operates a fishery that’s almost completely free of discards; is the board president of the Seafood Harvesters of America, an organization representing stewardship-minded fishermen; and has designed a squid net that reduces bycatch. The net contains an escape route at its base that exploits the bottom-dwelling behavior of unwanted flounder, encouraging them to flee the net through this gap. “We need to look at things entirely differently than we have in the last 30 years,” Brown says — and new gear is part of that equation. “It’s a matter of enlightened self-interest.”

Explanation:

Hope it helps

Answe:RNA는 핵 밖으로 이동합니r다.

Explanation:

Answer:

I believe it is B.

the one you chose

Explanation:

The weathering that most likely played the largest role in creating the cliff was when water in the river broke down the rocks into smaller pieces, which is present in Option B.

Rock cliffs can be formed by a variety of weathering processes. One common process is erosion caused by the movement of water as seen here as water flows through the mountains. Over time, these agents of erosion can wear away the softer layers of rock, leaving behind the harder layers that form the cliffs. Physical weathering is caused by the action of natural forces such as water, wind, etc. For example, water can flow into cracks in rock and then freeze and expand when the temperature drops, causing the rock to break apart. Wind can also erode rock surfaces over time by carrying small particles of sand and other debris that scrape and wear down the rock.

Hence, here the largest role in creating the cliff was when water in the river broke down the rocks into smaller pieces, which is present in Option B.

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Answer:

A Sunlight enables this plant to make its own food. Soil Soil is a mixture of rock fragments, nutrients, air, water, and the decaying remains of living things.

Explanation:

The prairie dogs obtain shelter by digging tunnels in the ground and food by eating the grass.

Hopefully this helped! :D

-LavenderVye

Answer:

The answer should be A

Explanation:

Just trust me

Answer:

single-celled organisms

Explanation:

Answer:

B

Explanation:

An organism's inherited traits can be found in genetic material within the nucleus of the cell.

Increasing the number of unsaturated fatty acids would increase the fluidity of a biological membrane.

This is because unsaturated fatty acids have double bonds in their carbon chains, which introduce kinks in the chains and prevent them from packing tightly together. This makes the membrane more fluid.

Decreasing the levels of cholesterol at high temperatures would also increase the fluidity of a biological membrane.

Cholesterol has a stabilizing effect on membranes, and at high temperatures, it prevents the membrane from becoming too fluid and losing its structure.

By decreasing the levels of cholesterol, the membrane becomes more fluid.

However, increasing the levels of cholesterol at low temperatures would decrease the fluidity of a biological membrane.

At low temperatures, the membrane becomes more rigid, and cholesterol helps to maintain its structure.

By increasing the levels of cholesterol, the membrane becomes even more rigid and less fluid.

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Answer:The enduring use of HeLa cells in biomedical research is represented below through a timeline of events and scientific publications that describe research using HeLa cells.

Explanation:

Answer:

1. Genetic drift

2. Natural selection

3. Adaption

4. Mutation

Explanation:

I'm not entirely sure that this is all correct, but for 2. Natural selection makes sense, and for the foxes that is adaption. I'm unsure about the first question though.

Hope this helps you a bit. Good luck on your studies.

Answer:

Coulomb's law formula describes the electrostatic force between two charged particles:

F = k * q1 * q2 / r^2

where F is the force, q1 and q2 are the charges of the two particles, r is the distance between them, and k is Coulomb's constant, which is approximately equal to 9 × 10^9 N⋅m^2/C^2.

The formula states that the electrostatic force between two charged particles is directly proportional to the product of their charges and inversely proportional to the square of the distance between them. Additionally, the force is attractive if the charges are of opposite signs and repulsive if the charges are of the same sign.

Birds, like airplanes, must be lightweight as well as powerful. They can fly only because evolution slimmed down their entire anatomy from their reptilian ancestors. Over time, the bones of birds have become lighter and, in the case of many "finger bones," some have disappeared altogether.

Answer: Skeletal system Explanation:

Replication is semi-conservative as concluded by Meselson and Stahl's experiment.

Meselson and Stahl's experiment provided evidence supporting the conclusion that DNA replication is semi-conservative. In the first step of their experiment, they labeled the DNA of the bacteria with a heavy isotope of nitrogen (15N). After allowing the bacteria to divide and replicate their DNA once, they extracted the DNA and observed its distribution in a centrifuge.

In the second step, they transferred the replicated DNA into a medium containing a lighter isotope of nitrogen (14N) and allowed the bacteria to continue dividing. They then extracted the DNA and observed its distribution in a centrifuge again.

The results of the experiment showed that after one round of replication, the DNA molecules formed a band intermediate in density between the heavy DNA and the light DNA. This result supports the semi-conservative model of DNA replication.

In the semi-conservative model, each newly synthesized DNA molecule consists of one original (parental) strand and one newly synthesized (daughter) strand. The observed band in the experiment corresponds to this mixed composition of DNA molecules.

Therefore, based on the experimental findings, Meselson and Stahl concluded that DNA replication is semi-conservative, meaning that each new DNA molecule formed during replication contains one strand from the original DNA molecule and one newly synthesized strand.

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Answer:

i don't know

Explanation:

Answer:

1 removal of urea in urine

2 2 1 4 3 A

3 1 2 3 D

Answer:

i would say C...

Explanation:

How does the Big Bang explain this? well, in it’s initial moments, the universe was in an extremely hot dense state. It was so hot and dense that all matter was in the form of an opaque plasma, and light was not able to travel freely without scattering . As time went on the universe expanded and cooled until protons and electrons were able to combine to form hydrogen atoms, at which point the universe became transparent, and light was able to travel freely through space. The light that we measure now and call the CMB is that same light that has been traveling ever since. It is essentially a picture of the very early universe (called “the surface of last scattering.”) The Big Bang model, where the universe started in a hot dense state and has been expanding ever since, predicts the existence of this light, as well as its temperature and wavelength based on the subsequent expansion of the universe.

Answer:

Chlorophyll

Explanation:

Chlorophyll, the primary pigment used in photosynthesis, reflects green light and absorbs red and blue light most strongly. In plants, photosynthesis takes place in chloroplasts, which contain the chlorophyll.

There are many different job paths you might choose with this degree, but biology is a prerequisite for careers in the science and health sectors.

Relevant experience demonstrates your dedication to the field and helps you gain practical skills in a competitive employment market. It also gives you the chance to network with other professionals.

Profession experience might provide you a helpful understanding of the work if you're undecided of the area of biology you want to pursue.

You can qualify for a scholarship or bursary to help pay for your year-long industrial placement if your biology degree program includes one.

Therefore, There are many different job paths you might choose with this degree, but biology is a prerequisite for careers in the science and health sectors.

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Answer:

Differences between GMO and the Transgenic cell is given below:-

Explanation:

Genetically modified organisms (GMOs):-

Transgenic cell:-

The major difference in posttranscriptional modifications of mRNA between prokaryotes and eukaryotes is that eukaryotic mRNA undergoes more extensive modifications than bacterial mRNA. In eukaryotes, mRNA receives a 5' cap, a 3' tail, and often undergoes splicing to remove introns. These modifications help to protect the mRNA from degradation and promote efficient translation.

On the other hand, bacterial mRNA lacks these modifications and is typically translated as it is being transcribed, since transcription and translation occur simultaneously in the cytoplasm. The absence of a nuclear membrane in prokaryotes means there is no physical separation of transcription and translation, which allows for rapid response to environmental changes.

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Answer:

It's present in both :)

Explanation:

Answer:

they both have guanine

Explanation:

Answer:

Radius of the moon: 1.7 x 106 m. Orbital radius of the Moon around the Earth: 3.48 x 108 m.

Explanation:

Francis Crick proposed the genetic code hypothesis, which states that the sequence of nucleotides in DNA contains the instructions for the sequence of amino acids in a protein.

The genetic code is the set of rules that governs how the sequence of nucleotides in DNA is translated into the sequence of amino acids in a protein. The genetic code is composed of codons, which are three-nucleotide sequences that code for a specific amino acid or a stop signal in a protein.

There are 64 possible codons, but only 20 amino acids are commonly used in protein synthesis. This means that the genetic code is degenerate, meaning that more than one codon can code for the same amino acid.

Crick and his colleagues were able to decipher the genetic code using a combination of biochemical and genetic techniques. Their discovery of the genetic code was a major milestone in the field of molecular biology, as it provided the key to understanding how genetic information is stored and translated into the proteins that carry out the functions of life.

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Answer:

physical properties because the other two sound more like science

1. Temperate grassland and savanna have grasses as the predominant plant form.

2. Both temperate grassland and savanna mostly have animals that feed on grass [grazer] as the primary consumers.

Also, the two vegetation are prone to fire incident and both have been impacted by agriculture.

1. Temperate grassland and savanna have grasses as the predominant plant form.

2. Both temperate grassland and savanna mostly have animals that feed on grass [grazer] as the primary consumers.

Also, the two vegetation are prone to fire incidents and both have been impacted by agriculture.

The major organic product the Friedel-Crafts acylation reaction is attached in the image below.

The Friedel-Crafts acylation reaction is a commonly used organic reaction that involves the introduction of an acyl group (RCO⁻) onto an aromatic compound. The reaction is catalyzed by a Lewis acid, typically aluminum chloride (AlCl₃), and requires the use of an acid chloride or anhydride as the acylating agent.

The reaction proceeds through the formation of a complex between the Lewis acid and the acylating agent, which activates the electrophilic carbon of the acyl group. This electrophile is then attacked by the nucleophilic aromatic ring, resulting in the formation of a new carbon-carbon bond. The reaction can be used to synthesize a variety of aromatic ketones and other acylated products and has important applications in the production of pharmaceuticals, fragrances, and other fine chemicals.

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The magnification of the image would be ×7,000.

Using the magnification formula:

magnification = size of image / actual size of the specimen

We can substitute the values given:

magnification = 21 mm / 0.003 mm

magnification = 7,000

Therefore, the magnification of the image is ×7,000.

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