Covalent bonds are chemical bonds between ions.
A. True
B. False

The given statement is False.

The coral reef serves as a source of food and shelter for aquatic animals. Almost one fourth of the species present in ocean depends on coral reef for food and shelter. Coral reefs are often called as rainforest of the sea. They do not have only predatory relationship rather they have symbiotic relationship with aquatic organisms.

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The answer is b global warming

Answer: B) global warming

Explanation:

The burning of the fossil fuels liberates carbon dioxide and other harmful gases into the atmosphere. These gases are capable of causing greenhouse effect. As, these gases are diatomic these are capable of absorbing the light energy from sun causing the global temperature warm. The heat liberated from the terrestrial land and some energy from sun are reflected back to the space so as to prevent the earth from accumulation of excess heat energy. These gases being trapping the sunlight energy nullify the heat reflection process. Hence, increasing the global heat causing global warming.

The answer would be:

6,250 joules

Here's how to do it:

[tex]KE = \frac{1}{2}mv^{2}[/tex]

KE = kinetic energy (joules)

m = mass (kg)

v = velocity (m/s)

So with that formula let's figure out what was given to you.

500 kg and 5m/s

You know which is which based on the unit.

m = 500kg

v = 5m/s

Now all you need to do is plug it into your formula and solve.

[tex]KE=\frac{1}{2}mv^{2}[/tex]

[tex]KE= \frac{1}{2}(500kg)(5m/s)^{2}[/tex]

[tex]KE = \frac{1}{2}(500kg)(25m^{2/}s^{2})[/tex]

[tex]KE = \frac{1}{2}(12,500kg\cdot m^{2}/s^2})[/tex]

[tex]KE = 6,250kg\cdot m^{2}/s^{2}[/tex]

The unit [tex]kg\cdot m^{2}/s^{2}[/tex] also means joules

So the final answer is 6,250 joules.

Answer:

D

Explanation:

3TC is an antiretroviral treatment used to prevent HIV infection from becoming AIDS. After treatment with 3TC, the HIV population in a patient consists entirely of 3TC-resistant virus particles. What best explain this phenomenon?

Answer is:

c) Hydrogen Bonds

hydrogen bonds are the bonds that hold water together.

so the answer is C.) Hydrogen

a community starts to grow is the best answer because the cause and effect are directly related

The answer is B! Photosynthesis Inputs/Reactants are: Water, Sunlight, and Carbon Dioxide. Output/Products are: Oxygen and Glucose (sugar)

Answer:

B. Oxygen Gas and Molecules Of Sugar

Explanation:

Photosynthesis is the process through which plants make their own food.

Special structures called chloroplasts—located inside plant cells—help plants capture light energy from the Sun. The plants then use the energy to build molecules of sugar from carbon dioxide gas and water. Oxygen gas is a waste product of photosynthesis. Plants releases this waste oxygen into the air.

oxygen reacts with glucose in respiration

Glucose reacts with oxygen to form carbon dioxide and water, releasing energy during cellular respiration. The correct answer to what reacts with glucose is A. oxygen.

Carbohydrates react with oxygen in order to complete the reaction where glucose is converted into carbon dioxide and water during cellular respiration. By definition, carbohydrates contain carbon, hydrogen, and oxygen. This means that glucose, a carbohydrate with the formula C6H12O6, already has oxygen within its molecule. When glucose reacts with additional oxygen molecules, the process results in the formation of carbon dioxide (CO2) and water (H2O), releasing energy that cells can use.

The chemical equation for the reaction is:

C6H12O6 + 6 O2 → 6 CO2 + 6 H2O

This shows that each molecule of glucose requires six molecules of oxygen to complete the reaction. Therefore, the correct answer to the question is A. oxygen

The Correct Answer: C)

Because...

Each carbon is identical, they all have four valence electrons, so they can easily bond with other carbon atoms to form long chains or rings. In fact, a carbon atom can bond with another carbon atom two or three times to make double and triple covalent bonds between two carbon atoms.

Carbon can easily form many bonds due to its ability to share four electrons in covalent bonds, allowing for the formation of single, double, and triple bonds, and creating complex structures. Carbon's tetra-valency and preference for covalent bonding instead of ionic or metallic bonding are key to its versatility.Correct option is D

Carbon easily forms many bonds because it has the ability to share four electrons in covalent bonds. This characteristic allows carbon atoms to form a versatile range of compounds. Carbon is tetracovalent, meaning it typically makes four bonds to other atoms, and these bonds are covalent. The covalent bonds lead to a formation of either single, double, or triple bonds between carbon atoms or between carbon and other atoms such as hydrogen, oxygen, and nitrogen.

Answer:

Protein.

Explanation:

In the image above, we see a molecule that is made up of several amino acids. The molecule that is made up of amino acids is protein.

Proteins are the most abundant organic macromolecules in cells, fundamental to cell structure and function. They are found in all cell types and viruses.

They are formed by amino acids linked together and joined by peptide bonds, as shown in the image above.

Of extremely high molecular weight, proteins are composed of carbon, hydrogen, nitrogen and oxygen, practically all of them have sulfur. Elements such as iron, zinc and copper may also be present.

All proteins are made up of a set of 20 amino acids, arranged in varying specific sequences.

the answer is the last one

The phrase using a larger sample size indicates a limit to the scientific accuracy of the experiment.

The correct option is D.

Increasing the sample size in an experiment is often done to improve the statistical power and accuracy of the results. A larger sample size can provide more robust and reliable data, reducing the impact of random variations and errors.

However, even with a larger sample size, there may still be other factors that can affect the experiment's accuracy. While increasing the sample size can improve the precision of the findings, it does not guarantee absolute accuracy.

Other potential limitations to scientific accuracy could include issues related to the experimental design, measurement errors, biases, uncontrollable variables, and limitations in the equipment or methodology used in the experiment. Scientists are aware of these limitations and take measures to minimize them to the best of their abilities to ensure the validity and reliability of their research.

Hence , D is the correct option

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the answer would be 50 dominant 50 recessive

The correct option is d. 25% homozygous dominant, 50% heterozygous, and 25% homozygous recessive

The expected genotype percentages in the offspring of the cross between a plant with genotype YY and a plant with genotype Yy are:

These percentages follow Mendel's principles of genetics where the genotype ratio of YY:Yy:yy is 1:2:1.

The correct answer is - Troposphere.

The troposphere is the lowest part of the atmosphere. It is the densest part of it that borders with the lithosphere and the hydrosphere. The troposphere is the part of the atmosphere that supports all the life on Earth.

By polluting the troposphere, the effects on the human health will not be good at all, in fact it can be disastrous. The humans need air for the breathing, and the air that the humans breathe in is from the troposphere, so if the troposphere is polluted, than the humans will breathe in chemicals that are toxic and damaging for the human body. That will result in big problems with the health among the humans, especially health problems with the respiratory system, the heart, and cancer.

Answer:

A) Troposphere

I think C sorry if I am wrong

Answer:

C) The ecosystem will be able to support more organisms at higher trophic levels.

Explanation:

In ecology, primary productivity is understood as the efficiency of converting energy to organic substances from the reaction of autotrophic organisms by solar or chemical energy. That is, this productivity is related to the action of plants in photosynthesizing solar energy creating organic substances that will be absorbed by consumers along the food chain. The increase of this primary productivity results in the increase of plants and consequently in the increase of primary, secondary and tertiary consumers. From this we can state that the long-term effect of increasing the primary productivity of a terrestrial ecosystem results in an ecosystem's greater capacity to support more organisms at higher trophic levels.

the first on is fatty but what are the second drop down

The subject of this question is Social Studies, which encompasses various disciplines like history, geography, economics, and political science.

The subject of this question is Social Studies, which is the academic discipline that combines elements of history, geography, political science, economics, and sociology. It focuses on understanding human society, including its past, present, and future.

Social Studies covers a wide range of topics, such as world history, civics, economics, anthropology, and cultural studies. It helps students develop critical thinking skills, analyze social issues, and engage in informed decision-making.

matter can be recycled because reusing already used matter, helps make it into new matter. without wasting more matter. Any nonliving matter that living things need is called a nutrient. Carbon and nitrogen are examples of nutrients. Unlike energy, matter is recycled in ecosystems. ... Decomposers release nutrients when they break down dead organisms.

How Matter Moves Through Ecosystems

Living things need nonliving matter as well as energy. What do you think matter is used for? It's used to build bodies. It's also needed to carry out the processes of life. Any nonliving matter that living things need is called a nutrient. Carbon and nitrogen are examples of nutrients. Unlike energy, matter is recycled in ecosystems.

Decomposers release nutrients when they break down dead organisms.

The nutrients are taken up by plants through their roots.

The nutrients pass to primary consumers when they eat the plants.

The nutrients pass to higher level consumers when they eat lower level consumers.

When living things die, the cycle repeats.Summary

Nutrients are crucial to the growth of organisms.

Decomposers break down dead organisms into nutrients and gases so that they can be used by other organisms.

Nutrients can enter or exit an ecosystem at any point and can cycle around the planet.

WHY? to conserve what we have, for matter being recycled helps the ecosystem and its good for our planet!

Carrying capacity of an ecosystem is the defined as the largest population that it can sustain indefinitely with the available resources. Biologists also refer to carrying capacity as the “maximum load”. Carrying capacity has factors it depends on. These are the many abiotic and biotic factors in the ecosystem and some are more obvious than others.  The most obvious being, the availability of the basic needs of organisms which make up the different ecosystems. Some of these are food, water and shelter in which dictate how many individuals the ecosystem can sustain.

The correct answers are:

The patient will have less hemoglobin in the blood.

Anemia is characterized by a deficiency of red blood cells or hemoglobin, leading to a reduced oxygen-carrying capacity in the blood.

The patient will have a reduced oxygen supply to the cells.

Since anemia results in a lower number of red blood cells, which are responsible for transporting oxygen, there is a decreased ability to deliver oxygen to the body's tissues and cells.

The incorrect statements are:

The patient will have less immunity against bacteria.

Anemia itself does not directly affect the immune system. However, severe and prolonged anemia can lead to fatigue and weakness, making the person more susceptible to infections indirectly.

The patient will have a thicker blood composition.

Anemia is associated with a reduction in red blood cells, which can lead to a decreased viscosity or thickness of the blood.

The patient will have increased platelets in the body.

Anemia is not typically associated with an increase in platelets. Platelet levels may be affected by other conditions, but anemia itself does not cause an increase in platelets.

Your answer is it protects the heart and lungs

the correct asnwer is e

The answer is Mechanical.

There are common elements for humans genetic codes, so, in a sense, they have exactly the same type of units defining it, yet the combination of thrm can determine, among others, the phisical characteristics of a person

Answer:

     The right answer to this question is option D. A genetic code determines the physical traits of the body.

Explanation:

     What is known about the genetic code is that we have 4 different kinds of nucleotides, thymine, adenine, guanine and cytosine. There are more of them, but let's rely on these four for this question. These 4 nucleotides are the same on every living being on earth, what really changes is how they're organized on the protein making process. These proteins are going to be made based on the genetic code.

      After the explanation above, we can be sure that the genetic code determines physical traits of the body, and that's why every living being on earth have something in common, but at the same time, are not equal too.

Final answer:

The subunits of DNA, known as nucleotides, consist of a pentose sugar, a phosphate group, and a nitrogenous base. There are four bases: adenine, thymine, guanine, and cytosine, which are responsible for storing and transmitting genetic information to synthesize proteins.

Explanation:

Subunits of DNA and Their Functions

The subunits of DNA are called nucleotides. Each nucleotide is made up of three parts: a pentose sugar called deoxyribose, a phosphate group, and a nitrogenous base. There are four types of nitrogenous bases in DNA: adenine (A), thymine (T), guanine (G), and cytosine (C). The sequence of these bases forms the genetic code, which carries instructions for making proteins. DNA's structure facilitates its replication and the encoding of genetic information, while its packaging into chromosomes allows for the organization and distribution of genetic material during cell division.

Function of DNA Nucleotides

The sequence of the four bases along the DNA helix determines the genetic instructions for building proteins, which are vital for the structure, function, and regulation of the body's tissues and organs. Despite all human cells containing the same DNA, they can look and function differently due to the differential expression of genes and the complex process of gene regulation.

1. helicase

2. topoisermerase

3. rna primase

4. ligase

5. polymerase

RNA primase: synthesizes RNA primer at the initiation point.

helicase: unwinds the DNA molecule.

polymerase: synthesizes the complementary daughter strands.

topoisomerase: creates nicks ahead of the replication fork to relieve tension from unwinding.

ligase: joins the Okazaki fragments together.

RNA Primase: RNA primase is an enzyme responsible for synthesizing a short piece of RNA called an RNA primer. This primer serves as the starting point for DNA synthesis. It's essential because DNA polymerase (another enzyme) can only add new DNA nucleotides onto an existing strand of DNA. RNA primase creates this primer at the initiation point, providing a free 3'-OH group for DNA polymerase to attach to and begin the synthesis of a new DNA strand.

Helicase: Helicase is an enzyme that plays a crucial role in unwinding the DNA molecule during replication. DNA is a double-stranded helix, and helicase acts like a molecular zipper, breaking the hydrogen bonds between the complementary base pairs (A-T and G-C) and separating the two DNA strands. This unwinding is necessary for DNA replication to proceed.

Polymerase: DNA polymerase is an enzyme responsible for synthesizing the complementary daughter strands of DNA. It uses the existing DNA strands as templates and adds complementary nucleotides to each template strand, thus creating two new double-stranded DNA molecules. DNA polymerase also ensures that the new strands are accurate copies of the original DNA.

Topoisomerase: During the process of DNA unwinding and replication, the DNA molecule can become supercoiled and twisted. Topoisomerase is an enzyme that helps relieve this tension by creating nicks or breaks in the DNA ahead of the replication fork. This allows the DNA to unwind and prevents it from tangling or becoming overly twisted during replication.

Ligase: DNA ligase is an enzyme responsible for joining the Okazaki fragments together. Okazaki fragments are short segments of DNA that are synthesized on the lagging strand during DNA replication. DNA ligase functions to seal the gaps between these fragments, forming a continuous, unbroken strand of DNA on the lagging strand.

In summary, each of these enzymes plays a specific and crucial role in the DNA replication process, ensuring that DNA is accurately duplicated during cell division.

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A chordate is any member of the phylum Chordata which includes three sub-phyla; Vertebrata (vertebrates), Urochordata (tunicates) and Cephalochordata (lancelets). Chordates usually have a notochord (a stiff dorsal supporting rod) at some stage of their development. In vertebrates, this develops into spine. They also have pharyngeal slits and a tail.

Examples of chordates are vertebrates such as humans, pandas and alligators.

Vertebrata is the biggest group within the chordates. Members of this sub-phylum are characterized by their vertebral column which is made up of several bony vertebrae joined together as a backbone .

Answer: A chordate is an organism in the phylum Chordata (which includes the vertebrates). Every chordate possesses 5 defining characteristics at some point in its life. These include a notochord, a dorsal nerve chord, an endostyle or a thyroid, pharyngeal slits, and a postanal tail. The largest group of chordates are the vertebrates.

The two claims that refute the idea of spontaneous genesis are as follows: - Only previously existing matter may give rise to living cells.

- Cells develop from preexisting cell populations.

These are the right answers: (D) and (E).

These ideas contradict spontaneous creation since they are a component of the cell hypothesis, which holds that cells are the fundamental building block of all living things' structure and function and that all living things are made of them. Furthermore, this theory disproves the notion that living things can spontaneously form from nonliving stuff by asserting that all cells originate from preexisting cells.

by: short double-stranded RNA molecules in a cell's cytoplasm, where they interact with the catalytic RISC component argonaute.

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what are the drop down options

The answer is here,

Option B)  It can make antibodies immediately.

Thank you.

Answer:

The correct answer is option B) It can make antibodies immediately.

Explanation:

The secondary immune response occurs when the same antigen is exposed to the person more than one time. The immune system immediately starts making antibodies to attack the antigen. By the second time, memory cells are established and start making antibodies immediately. The lag phase is shorter as compared to the primary immune response. Memory cells are cells responding cells for secondary immune response.

I would say the the answer would be the second choice...But im not positive.

Answer:

2. from the Sun to the surface of the Earth, where it is absorbed or reflected

Explanation:

The solar radiations come from the Sun and enter the atmosphere to hit the ground of the earth. Part of the solar radiations is absorbed by the atmosphere and other materials present on the surface of the earth. The earth surface also absorbs part of the solar radiations.

However, the surface of the earth reflects some radiations back to space at night. Hence, solar radiations are released from Sun after which they hit the surface of the earth where they are absorbed or reflected.

a mutation would have to occur in both copies of the gene to cause the disorder