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2 years ago

How can the freezing of surface waters make the water that is left unfrozen denser

Biology

2 answers:

yKpoI14uk [10]2 years ago

7 0

Explanation:

When an aqueous solution freezes, the unfrozen solution becomes denser. That's because some of the water has been removed as ice. However, the solutes remain dissolved in a solution with a smaller liquid volume. The concentration of the solution increases, so the density increases.

agasfer [191]2 years ago

3 0

this is because water expands as it gets cold hence floating leaving the unfrozen water dense

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Which function is performed by Earth's magnetic field?

mafiozo [28]

Answer:

D. Ultraviolet rays from the sun are prevented from reaching Earth.

surface.

Explanation:

What little is known is that the Earth's magnetic field creates the so-called "magnetic shield" that provides protection against some other dangerous forms of radiation, namely cosmic rays and solar wind.

While there is no danger of losing the Earth's gravitational field, the Earth's magnetic field is declining faster than any other geophysical phenomenon. This continuous loss of the Earth's magnetic field, and the associated increase in harmful radiation, are beyond human control.

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2 years ago

differences in the beak depth (in the figure below) of the three species of geospiza (darwin's finches) that are found on the ga

worty [1.4K]

As described in this case, firstly G.fuliginosa species of bird were live on Los hermanos island solely thus they didn't face any competition.

Darwin's finches are a group of birds that diversified after they migrated from South America to the Galapagos Islands. They each evolved on separate islands separated by large bodies of water. They are therefore an example of allopatric speciation. Repeated volcanic eruptions have helped shape the rugged mountainous landscape of the Galapagos Islands.

The Galapagos Islands are known for their diversity of flora and fauna. Many species are endemic and cannot be found anywhere else in the world. The Galapagos Islands lie on either side of the equator in both the northern and southern hemispheres. These islands are located at the confluence of her three currents in the Pacific Ocean creating an area where warm and cold waters converge.

Learn more about The Galapagos Islands here:-brainly.com/question/303869

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1 year ago

The presence of an appropriate enzyme affects only the __________.

iVinArrow [24]

Answer;

-The rate of the reaction;

The presence of an enzyme affects only the rate of the reaction.

Explanation;

-Enzymes are biological catalysts. Catalysts lower the activation energy for reactions. The lower the activation energy for a reaction, the faster the rate. Thus enzymes speed up reactions by lowering activation energy.

-Additionally, the rate of a chemical reaction increases as the substrate concentration increases. Enzymes can greatly speed up the rate of a reaction. However, enzymes become saturated when the substrate concentration is high.

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3 years ago

How could the loss of biodiversity affect humans? It may cause an increase in the human population as competition is reduced. It

loris [4]

Answer:

It may lead to the loss of potential medicines, foods, and products

Explanation:

Biodiversity or biological diversity refers to the variation of life. It is the total number of different variety of species of organisms that exists in the biosphere. Biodiversity is key to the survival of living organism on Earth.

Loss of biodiversity will also lead to the loss of potential medicines, foods, and products, which will greatly affect the human population as we rely on diverse plants and other animals for the above listed substances.

5 0

3 years ago

Read 2 more answers

The trait for medium-sized leaves in iris is determined by the genetic condition PP'. Plants with large leaves are PP, whereas p

loris [4]

Answer:

See the answer below

Explanation:

Medium size leaves genotype = PP'

Large leaves genotype = PP

Small leaves genotype = P'P'

Red flower genotype = RR

Pink flower genotype = RR'

White flower genotype = R'R'

Two plants each with medium-sized leaves (PP') and pink flowers (RR') were crossed.

PP'RR' x PP'RR' (let PP' = Aa and RR' = Bb)

Progeny and expected phenotypes

1 PPRR - large leaves, red flower = 1/16 x 640 = 40 seedlings

2 PPRR' - large leaves, pink flower = 2/16 x 640 = 80 seedlings

2 PP'RR - medium leaves, red flower = 2/16 x 640 = 80 seedlings

4 PP'RR' - medium leaves, pink flower = 4/16 x 640 = 160 seedlings

1 PPR'R' - large leaves, white flower = 1/16 x 640 = 40 seedlings

2 PP'R'R' - medium leaves, white flower = 2/16 x 640 = 80 seedlings

1 P'P'RR - small leaves, red flower = 1/16 x 640 = 40 seedlings

2 P'P'RR' - small leaves, pink flower = 2/16 x 640 = 80 seedlings

1 P'P'R'R' = small leaves, white flower = 1/16 x 640 = 40 seedlings

4 0

2 years ago