what direction do polar cells flow in the northern hemisphere?

Answer:

Declining populations of phytoplankton, the basis of the marine food chain, will alter the seawater hues, potentially decimating fisheries. The world's oceans are warming and growing more acidic as a result of climate change, and a provocative new study suggests they'll be changing color too.

Explanation:

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Answer:

Nucleus, mitochondrion, and chloroplast

Explanation:

If I were to be a prokaryotic cell that suddenly develops the ability to take on 3 organelles that I do not already have, I would pick a nucleus, a mitochondrion, and a chloroplast.

The presence of the nucleus would enable the freely lying genetic materials in the cytoplasm to become organized and packaged within the nucleus, thereby enabling more controls over transcription and translation processes.

Also, the presence of mitochondrion would increase the efficiency of energy generation through oxidative phosphorylation and the chloroplast will enable the cell to be able to manufacture its own food through photosynthesis rather than depending on external sources for foods.

Answer:

sorry but i need these points for a assignment

Answer:

Soil texture is determined by the size and proportion of the particles that make up the soil. Every soil can be separated into three fractions – sand, silt, and clay. Sand particles are the largest and make the soil feel gritty. Silt particles are medium sized and give a smooth, floury feeling to the soil.

Uh, I hope it helps you understand? :T

Answer:

1.) Self-Pollinating, 2.) Cross-Pollinating, 3.) Fertilize

Explanation:

Pea plants are know to self-pollinate, so when Mendel transferred pollen to one pea plant to the other, it would be called cross-pollinating. Think of it as exchanging. This allowed the pea plants to fertilize the eggs.

1.) Self-Pollinating,

2.) Cross-Pollinating,

3.) Fertilize

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Answer:

Air, food, water and space

Answer:

Organisms compete for the resources they need to survive- air, water, food, and space. In areas where these are sufficient, organisms live in comfortable co-existence, and in areas where resources are abundant, the ecosystem boasts high species richness...

Eutrophication is when the environment becomes enriched with nutrients. This can be a problem in marine habitats such as lakes as it can cause algal blooms. Some algae even produce toxins that are harmful to higher forms of life. This can cause problems along the food chain and affect any animal that feeds on them.

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Answer:

Excessive nutrients lead to algal blooms and low-oxygen (hypoxic) waters that can kill fish and seagrass and reduce essential fish habitats. Eutrophication sets off a chain reaction in the ecosystem, starting with an overabundance of algae and plants.

Explanation:

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Answer:

because taxes and prices in the stockmarket are going up so they have enough money so they lower the prices

Explanation:

Answer:

B: Farmers can produce more crops from the same amount of land.

Explanation:

American farms grew larger and more productive at the same time that the global demand for their crops, and the food made from those crops, accelerated. The United States exported 6,988,000 metric tons of corn in 1960. In 2007, the United States exported almost nine times that amount: 61,913,000 metric tons of corn. Corn exports have declined since 2007 because the growth of the ethanol industry has kept more of the corn crop at home. To meet the growing global demand for corn on basically the same amount of land, American farmers improved the productivity of their crops: corn yields, as measured in tons per hectare, more than doubled from 1960 to today.

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Answer:

did you get the answer yet

Answer:

The iron will separate from the tin.

Explanation:

Answer:

2273 Is the amount of heat energy lost by zooplankton

Explanation:

Answer:

the presence of antennae

Explanation:

In the 1950s, Francis Crick and James Watson worked together at the University of Cambridge, England, to determine the structure of DNA. Other scientists, such as Linus Pauling and Maurice Wilkins, were also actively exploring this field. Pauling had discovered the secondary structure of proteins using X-ray crystallography. X-ray crystallography is a method for investigating molecular structure by observing the patterns formed by X-rays shot through a crystal of the substance. The patterns give important information about the structure of the molecule of interest. In Wilkins’ lab, researcher Rosalind Franklin was using X-ray crystallography to understand the structure of DNA. Watson and Crick were able to piece together the puzzle of the DNA molecule using Franklin’s data (Figure 9.2). Watson and Crick also had key pieces of information available from other researchers such as Chargaff’s rules. Chargaff had shown that of the four kinds of monomers (nucleotides) present in a DNA molecule, two types were always present in equal amounts and the remaining two types were also always present in equal amounts. This meant they were always paired in some way. In 1962, James Watson, Francis Crick, and Maurice Wilkins were awarded the Nobel Prize in Medicine for their work in determining the structure of DNA.

Photo in part A shows James Watson, Francis Crick, and Maclyn McCarty. The x-ray diffraction pattern in part b is symmetrical, with dots in an x-shape.

Figure 9.2 Pioneering scientists (a) James Watson and Francis Crick are pictured here with American geneticist Maclyn McCarty. Scientist Rosalind Franklin discovered (b) the X-ray diffraction pattern of DNA, which helped to elucidate its double helix structure. (credit a: modification of work by Marjorie McCarty; b: modification of work by NIH)

Now let’s consider the structure of the two types of nucleic acids, deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). The building blocks of DNA are nucleotides, which are made up of three parts: a deoxyribose (5-carbon sugar), a phosphate group, and a nitrogenous base (Figure 9.3). There are four types of nitrogenous bases in DNA. Adenine (A) and guanine (G) are double-ringed purines, and cytosine (C) and thymine (T) are smaller, single-ringed pyrimidines. The nucleotide is named according to the nitrogenous base it contains.

(a) Each DNA nucleotide is made up of a sugar, a phosphate group, and a base.

Figure 9.3 (a) Each DNA nucleotide is made up of a sugar, a phosphate group, and a base.

(b) Cytosine and thymine are pyrimidines. Guanine and adenine are purines.

Figure 9.3 (b) Cytosine and thymine are pyrimidines. Guanine and adenine are purines.

The phosphate group of one nucleotide bonds covalently with the sugar molecule of the next nucleotide, and so on, forming a long polymer of nucleotide monomers. The sugar–phosphate groups line up in a “backbone” for each single strand of DNA, and the nucleotide bases stick out from this backbone. The carbon atoms of the five-carbon sugar are numbered clockwise from the oxygen as 1′, 2′, 3′, 4′, and 5′ (1′ is read as “one prime”). The phosphate group is attached to the 5′ carbon of one nucleotide and the 3′ carbon of the next nucleotide. In its natural state, each DNA molecule is actually composed of two single strands held together along their length with hydrogen bonds between the bases.

Watson and Crick proposed that the DNA is made up of two strands that are twisted around each other to form a right-handed helix, called a double helix. Base-pairing takes place between a purine and pyrimidine: namely, A pairs with T, and G pairs with C. In other words, adenine and thymine are complementary base pairs, and cytosine and guanine are also complementary base pairs. This is the basis for Chargaff’s rule; because of their complementarity, there is as much adenine as thymine in a DNA molecule and as much guanine as cytosine. Adenine and thymine are connected by two hydrogen bonds, and cytosine and guanine are connected by three hydrogen bonds. The two strands are anti-parallel in nature; that is, one strand will have the 3′ carbon of the sugar in the “upward” position, whereas the other strand will have the 5′ carbon in the upward position. The diameter of the DNA double helix is uniform throughout because a purine (two rings) always pairs with a pyrimidine (one ring) and their combined lengths are always equal. (Figure 9.4).

Carbon dioxide affects the Earth's climate while carbon dioxide is in the air waiting to be reabsorbed; it traps the sun's heat. The correct option is b.

Carbon dioxide whose chemical formula is CO2 is a chemical compound made up of molecules that each have one carbon atom covalently double bonded to two oxygen atoms. It is found in the gas state at room temperature.

In the air, carbon dioxide is transparent to visible light but absorbs infrared radiation, acting as a greenhouse gas. It is a trace gas in Earth's atmosphere at 421 parts per million, or about 0.04% by volume as of May 2022, having risen from pre-industrial levels of 280 ppm. Burning fossil fuels is the primary cause of these increased CO2 concentrations and also the primary cause of climate change. Carbon dioxide is soluble in water and is found in groundwater, lakes, ice caps, and seawater.

When carbon dioxide dissolves in water, it forms carbonic acid, which causes ocean acidification as atmospheric CO2 levels increase.

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The label that best describes the image is Volcano quietly erupts due to low-viscosity magma!. The correct option is c.

A volcano is an aperture or vent through which lava, tephra (small rocks), and steam are released onto the surface of the planet.

The broad-domed volcano with gently sloping sides known as the Shield Volcano is known for its frequent eruptions of fluid, basaltic lava.

A broad-topped volcano with gently sloping sides known as the Cinder Volcano is known for its frequent eruptions of fluid basaltic lava. A broad-topped volcano with gently sloping sides known as a composite volcano is one that frequently erupts with fluid basaltic lava.

Therefore, the correct option is c. Volcano quietly erupts due to low-viscosity magma!

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The question is incomplete. The image is added below:

Answer: C on edg : Volcano quietly erupts due to low-viscosity magma!

Answer:

Animal should be bred once or twice per year.

Explanation:

their is interval of time where they get enough opportunity to rest and recover between pregnancies.

sorry if I'm wrong.

Your dog experiences a lot of pain throughout breeding, pregnancy, birth, and delivery. She needs all the time you can offer her to get over her trauma, animals should be bred once or twice per year, hence option c is correct.  

We advise giving her at least one heat cycle between each breeding, at the very least. Selective breeding is the process of controlling the breeding of organisms to either show or removes a certain trait.

Selective breeding makes use of artificial selection to direct the genetic transmission of desirable traits. In contrast to natural selection, selective breeding focuses on traits that will benefit humans. It is a technique that is widely used in plant management and animal husbandry.

Therefore, this selective breeding helps to obtain and retain the homozygous qualities of selected characters, animals bred once or twice per year rest and recover between pregnancies.

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Answer:

Answer:

24800

Explanation:

To get the velocity for this problem

we need to simply multiply the number together

124 × 200 = 24,800

Velocity equation

Hertz x meters = velocity

Answer:

starfish has unsegmented body

bird is a vertebrate

octopus packs colored blood

scorpion lacks annternna

Answer:

A.  mRNA only

Explanation:

The type of RNA that contains a copy of the instructions that a gene carries is mRNA.

RNA stands for ribonucliec acid. It is genetic material in some organisms like viruses. It is of three types, namely mRNA, rRNA and tRNA. mRNA contain a copy of the instructions that a gene carries.

Translation is the process of formation of protein by mRNA.  

In this process the gene encodes a protein, and instructions are given for making protein.

mRNA plays main role in protein synthesis, as it contain a copy of the instructions that a gene carries.

Thus, the correct option is A.

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652,190

Explanation:

All you gotta do is add

Answer:

Since there are many factors that can produce a mutation, the event that would be most likely to cause a mutation is a nucleotide is inserted into a DNA strand.

Explanation:

A genetic mutation involves an alteration of the DNA that leads to a defect in protein synthesis and a structural or functional alteration of an individual.

Of all the factors that can produce a mutation, the insertion of one or two nucleotides into the DNA strand produces a point mutation, or molecular mutation, of the insertion type.

    The other options are not correct because the processes of mRNA traveling out of the nucleus, mRNA releasing from the DNA strand or enzymatic transcription of mRNA in the nucleus can carry over a mutation produced in the DNA, but they are not mutation-producing factors.

Answer:

oxygen

Explanation:

A limiting factor is any condition whose decrease, increase, absence or presence is able to limit/stop population growth. Examples of limiting factors include abiotic conditions (e.g., temperature, water, oxygen, CO2, etc) or biotic conditions (e.g., food, mate, etc). There are many aquatic species that require high levels of oxygen (e.g., fish), thus being it a limiting factor for these species.

Answer:

The position of the Moon and Earth are different.

Answer:

choose the best option?

Explanation:

"Winning" at natural selection refers to successfully passing on one's genes to the next generation.

Natural selection is a mechanism of evolution that favors traits that increase an organism's chances of surviving and reproducing. In order to "win" at natural selection, an organism must have traits that help it survive and reproduce in its particular environment.

For example, a bird with a beak that is well-suited to its particular food source is more likely to survive and pass on its genes than a bird with a less suitable beak. However, it's important to note that natural selection is not a conscious or deliberate process, and there is no "goal" or "endgame" to evolution. Instead, it is simply a description of the mechanism by which species change over time.

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