which plant cell organelle supports and maintains the cell's shape and protects the cell from damage cell membrane cell wall chloroplast vacuole​

Answer:

True

Explanation:

The expanding universe theory was developed from the observed redshifts of celestial bodies, that the space between galaxies is expanding so that they appear to recede from us at velocities that increase with their distance

Answer:

True

Explanation:

The value that stays the same as long as there are no signals in the neuron is known as resting potential.

Neurons are the nerve cells. These are the longest cell in the human body. The structure of a neuron comprises of a cell body from which arise the various branch-like extensions called the dendrites. From one end emerges the axon that ends at the axon terminal.

Resting potential is the potential difference of ions across the plasma membrane when the cell is resting and no nerve impulse is being conducted. The value of resting potential is approximately -70 mV in majority of the neurons.

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Answer:

Gametes

Explanation:

Gametes are an organism's reproductive cells. They are also referred to as sex cells. Female sex cell is called the ovum while the male sex cell is called sperm. When these two sex cells come together during fertilization they form the gamete, which is made up of diploid number of chromosomes. Gametes are normally formed through meiosis, during the cell division, the germ cell undergo two fission, which results in four gametes.

Answer:

A. Gametes

Explanation:

E2020

A and B, two radioactive nuclei, start out with an equal quantity of radioactive atoms. Sources A and B each have a half-life of one hour and two hours, respectively.

After two hours, the ratio of A's and B's rates of disintegration is- No cause for concern. The half lifetimes of two radioactive nuclei, A and B, are respectively 10 and 20 minutes. After six minutes, the ratio of the decayed numbers of nuclei A and B will be A. 9:8, assuming that the initial number of nuclei in a sample is equal.A and B, two radioactive compounds, have decay constants of 5 and 1, respectively. They both contain the same number of nuclei at time zero.

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Answer:

Explanation:

To make more money and to have a better economy as a country together

Answer: They want to make sure that there is a steady supply at a reasonable price so they can use the oil that they need.

Explanation:  

As a cartel, the OPEC+ member countries collectively agree on how much oil to produce, which directly impacts the ready supply of crude oil in the global market at any given time. OPEC+ subsequently exerts considerable influence over the global market price of oil and, understandably, tends to keep it relatively high in order to maximize profitability.

If OPEC+ countries are unsatisfied with the price of oil, it is in their interests to cut the supply of oil so prices rise. However, no individual country actually wants to reduce supply, as this would mean reduced revenues. Ideally, they want the price of oil to rise while they increase supply so that revenues also rise. But that is not market dynamics. A pledge by OPEC+ to cut supply causes an immediate spike in the price of oil. Over time, the price reverts back to a level, usually lower, when supply is not meaningfully cut or demand adjusts.

Conversely, OPEC+ can decide to boost supply. For instance, on June 22, 2018, the cartel met in Vienna and announced that they would be increasing supply.3  A big reason for this was to offset the extremely low output by fellow OPEC+ member Venezuela.

Saudi Arabia and Russia, two of the largest oil exporters in the world who both have the ability to increase production, are big proponents of increasing supply as that would increase their revenues. However, other nations, who cannot ramp up production, either because they are operating at full capacity or are otherwise not allowed to, would be opposed to this.

Answer:

Water also raises blood pressure in older normal subjects, but not in young normal subjects. The studies suggest that water is an important unrecognized factor in clinical studies of blood pressure medications. Drinking more water at 60 minutes caused the blood pressure effect to be sustained for another hour.

Answer:

They are divided on the basis of flowering and non-flowering plants I.e. Angiosperms and Gymnosperms

Explanation:

Answer:

studies comparing DNA sequences.

Explanation:

That should be the answer if you are taking biology chapter 22, plant evolution. (It's in the book) :)

For a human enzyme to function properly the temperature of the environment should range from 35 to 40°C. Thus, the most optimal temperature will be 38°C.

The optimal conditions are the set of conditions at which an enzyme shows maximum activity. The conditions such as temperature, pH, pressure, and solute concentration affect the activity of an enzyme in a chemical reaction.

The Human enzyme would function best on the temperature of 38°C because it is the closest temperature to the temperature of human body. The optimal temperature of most of the enzymes is in the range of 35 to 40°C.

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Answer:

In order, D,C, B, A

Explanation:

Answer:

1. A.

2. B.

3. C.

4. D.

Explanation:

It's hard to explain in much detail; all I can say is really spend a lot of time studying DNA replication, as you'll find that it will pay off later.

Answer:

D) As you go from one level to the next, only 10% of the energy is transferred to the next level

Explanation:

The 10% Rule means that when energy is passed in an ecosystem from one trophic level to the next, only ten percent of the energy will be passed on. You can also look at an energy pyramid thing too, they show this! :D Hope this helps, have a nice day :))

Mendelian inheritance states that traits are determined when offspring receive one allele for each trait from each parent.

Mendelian inheritance, named after the Austrian monk Gregor Mendel, explains how traits are passed on from parents to offspring. The basic principle of Mendelian inheritance is that traits are determined by the inheritance of alleles, which are different forms of a gene.

1. Alleles: Genes exist in pairs, with one allele inherited from each parent. These alleles can be either dominant or recessive. Dominant alleles exert their effects even if only one copy is present, while recessive alleles require two copies to be expressed.

2. Gamete Formation: When an organism produces gametes (sperm or eggs), it undergoes a process called meiosis. During meiosis, the pairs of alleles separate, so that each gamete receives only one allele for each trait.

3. Fertilization: When two gametes (one from each parent) combine during fertilization, the resulting offspring inherits one allele for each trait from each parent. This is why offspring typically exhibit a combination of traits from both parents.

4. Punnett Square: To predict the possible combinations of alleles in offspring, a Punnett square can be used. This is a grid that helps determine the probability of different genotypes and phenotypes.

5. Dominant and Recessive Traits: If a dominant allele is present, it will be expressed in the offspring's phenotype. However, if both alleles are recessive, the recessive trait will be expressed.

Overall, Mendelian inheritance provides a framework for understanding how traits are inherited and passed down from one generation to the next through the transmission of alleles from each parent.

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In the Hershey-Chase experiment, the isotope 35S was used to label protein, and the isotope 32P was used to label DNA.The Hershey-Chase experiment was a series of experiments carried out in 1952 by Alfred Hershey and Martha Chase.
These experiments were carried out to determine the nature of the genetic material. In this experiment, the researchers used bacteriophages (viruses that infect bacteria) to investigate whether DNA or protein is the genetic material.Hershey and Chase used radioactive isotopes to label either the protein coat of the virus or the DNA inside it. The bacteriophages were then allowed to infect bacteria, and the researchers observed what happened. They found that when the virus's DNA was labeled with the radioactive isotope 32P, the radioactivity entered the bacteria. On the other hand, when the protein coat was labeled with the radioactive isotope 35S, no radioactivity was detected in the bacteria. This led to the conclusion that DNA is the genetic material that controls the characteristics of an organism.

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Answer:

Rising CO2 levels affect a lot of plants directly by stimulating photosynthesis and reducing the loss of water (plant transpiration) by reducing the opening of the small pores in the leaves, known as 'stomata'. This triggers several more subtle, indirect effects.

Explanation:

The loss of 131 cells in the development of C. elegans is due to the process of apoptosis, a programmed cell death mechanism.

The process by which an embryo of C. elegans loses 131 cells is apoptosis. Apoptosis is a programmed cell death mechanism that occurs naturally during development to eliminate unnecessary or excess cells.

In the case of C. elegans, the removal of specific cells through apoptosis is a crucial part of its normal development and results in the precise formation of its adult body structure.

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In conclusion, both physiological changes in outer cell membrane phospholipids and genotypic changes may contribute to potential resistance or tolerance, but further investigation is needed for a more definitive explanation.

The potential resistance or tolerance observed in this context could be attributed to physiological changes in the composition of outer cell membrane phospholipids. These changes may alter the membrane's properties and affect its interaction with external factors. Additionally, it is possible that specific genotypic changes could also play a role in conferring resistance or tolerance. However, without further information or research, it is challenging to determine the exact mechanisms behind these observations. In conclusion, both physiological changes in outer cell membrane phospholipids and genotypic changes may contribute to potential resistance or tolerance, but further investigation is needed for a more definitive explanation.

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Regulating the materials that may enter or leave a cell. The cellular membrane is a biological membrane that separates and protects indoors of all cells from the outside surroundings.

The plasma membrane, or the cellular membrane, gives protection to a cell. It also presents a fixed environment in the cellular, and that membrane has several specific functions. One is to move nutrients into the mobile and also to move poisonous materials out of the cell.

An organelle is a membrane certain shape observed inside a cellular. much like cells have membranes to hold the entirety in, these mini-organs are also sure in a double layer of phospholipids to insulate their little booths inside the large cells.

The cell membrane, additionally known as the plasma membrane, is observed in all cells and separates the indoors of the mobile from the outside environment. The cellular membrane consists of a lipid bilayer that is semi-permeable.

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The probability that the offspring will be homozygous for the deleterious recessive allele (q) in a population where the allele exists at a proportion of 0.01 is 0.0001.

In a population with a rare deleterious recessive allele at a proportion of 0.01, we can denote the frequency of the dominant allele as p and the frequency of the recessive allele as q. Since the allele is rare, we can assume that the population is in Hardy-Weinberg equilibrium.

According to the Hardy-Weinberg principle, the frequencies of the genotypes in a population can be determined by the square of the allele frequencies. For a recessive allele, the frequency of homozygous recessive individuals (q²) is equal to q squared.

we can calculate q² as follows:

q² = (0.01)² = 0.0001.

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This statement is False because With everyday situations, a rich media works well. Jargon refers to the informal organization's unofficial gossip and rumor-based communication system.

There are problems with pollution, population growth, an increase in contagious illnesses, and investigations on DNA and synthesized biology that lack openness. Additionally, there are ecological concerns including ocean acidification, threatened species, stem cell studies and global warming.

Many care plan and cosmetic products contain components that are derived from biological sources. Only a few samples of commonplace things based on biology include soap, lotion, nail polish remover, diapers, henna dye, shampoo, henna dye, cosmetics, fragrances, and loofahs.

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I think it’s a. 12

Explanation:if it’s wrong kill me

“Tell me if I’m right”

Stromatolites in the Cambrian period flourished due to the availability of open niches, option A is correct.

During this time, the Earth's oceans provided abundant opportunities for stromatolites to thrive. These microbial mats formed layered structures, capturing sediment and promoting the growth of new layers. The availability of open niches allowed stromatolites to expand their populations and colonize various habitats, resulting in their flourishing.

Stromatolites did not decline during the Cambrian due to the evolution and overgrazing of invertebrate organisms. Invertebrates coexisted with stromatolites during this period. Stromatolites did not flourish due to new forms evolving and becoming more resilient, as they are primarily composed of microbial communities. Stromatolites did not decline due to competition from other reef-building organisms, as reef-building organisms were not as prevalent during the Cambrian, option A is correct.

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The correct question is:

Stromatolites in the Cambrian due to: [group of answer choices]

A) flourished; availability of open niches.

B) declined; evolution and overgrazing of invertebrate organisms.

C) flourished; new forms evolved and becoming more resilient.

D) declined; competition of other reef-building organisms.

Answer:

Mitosis is used to produce daughter cells that are genetically identical to the parent cells. The cell copies - or 'replicates' - its chromosomes, and then splits the copied chromosomes equally to make sure that each daughter cell has a full set.

Explanation:

The benefit of adding both forms of nitrogen to the soil is that it can provide a more balanced and sustainable source of nitrogen for plant growth and development. While plants are more efficient at taking up nitrate in their roots, both ammonia or ammonium and nitrate forms of nitrogen can be beneficial for plants in different ways.

Ammonia or ammonium forms of nitrogen are usually converted to nitrate by soil microorganisms, which helps to create a more stable and consistent source of nitrogen for plant uptake. Ammonia or ammonium fertilizers are also often less expensive and more readily available than nitrate fertilizers, making them a popular choice for commercial farmers and gardeners.

On the other hand, nitrate forms of nitrogen are more mobile in the soil, which allows them to reach deeper into the root zone and provide a more rapid source of nitrogen for plants. Nitrate fertilizers are also more water-soluble, which can be helpful in irrigated or high rainfall areas.

By providing both forms of nitrogen to the soil, commercial fertilizers can help to ensure that plants have a consistent and balanced source of nitrogen for optimal growth and yield. This can also help to reduce the risk of nutrient imbalances or toxicities that can occur when plants are over-fertilized with a single form of nitrogen. Overall, using a combination of both ammonium or ammonia and nitrate fertilizers can be a useful strategy for promoting healthy plant growth and maximizing crop yields.

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In a biological membrane, the phospholipids are arranged in a bilayer, with the hydrophilic heads facing outwards and the hydrophobic tails facing inwards. This arrangement creates a selectively permeable barrier that allows certain substances to enter or exit the cell.

The bilayer structure of phospholipids is essential for maintaining the integrity and functionality of the cell membrane.Every phospholipid molecule has two elements: the head (or the phosphate group), and two tails (two chains of fatty acids that lie side by side). The head is polar in nature, hence it is hydrophilic and carries a negative charge. This phosphate portion of the phospholipid molecule is attracted to water.

The chains of fatty acids (or the chains) are so placed to prevent them from coming into contact with water, as it is hydrophobic in nature. The bilayer shields the tail and forms noncovalent bonds.

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Answer:

34

Explanation:

26--2×4

After the S phase in the cell cycle, cells enter the G2 phase, also known as the second gap phase. During the G2 phase, cells undergo additional growth and preparation for cell division.

This phase is marked by the synthesis of various proteins and organelles that are necessary for mitosis, as well as the replication of centrosomes.

One of the main goals of the G2 phase is to ensure that the cell has accurately replicated its DNA during the S phase. Specialized proteins monitor the DNA replication process and detect and repair any errors that may have occurred. This checkpoint ensures that the cell is not allowed to progress to the next phase of the cell cycle until it has fully completed DNA replication and corrected any mistakes.

After the G2 phase, cells enter the M phase, which is the stage of mitosis where the cell divides into two identical daughter cells. During the M phase, the cell undergoes a series of complex events, including chromosome condensation, spindle formation, and nuclear envelope breakdown.

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The statement, 'Science not only has achievements but also challenges' is justified by the benefits and dangers that Humanity and Nature got from Science.

The development of Science led to a lot of benefits in the educational and medicinal fields. For example, Modern Science and Technology made online and live classes possible. So, whatever the crisis comes, the students are still able to continue their education. Construction and launching of satellites developed many countries.

And, the discovery of medicines and vaccines helped to overcome rare and lethal diseases reducing the death rate. Science also plays a vital role in Agriculture providing insecticides and pesticides and also leading to the growth of Hybrid Technology. The trending achievement of Science is Genetic Engineering and Plant Tissue Culture.

However, Science has a lot of disadvantages. The development and discovery of new devices has made a lot of children and adult addicted to them. It affects their education too. And, the building up of phone towers causes harness to tiny birds and their rays affect many living creatures.

The research in medicine by the wrong people creates the wrong medicines and addictive drugs. Also, the discovery of atoms and nuclei led to the development of nuclear weapons and reactors which had been used by a lot of countries for their political issues and it caused numerous deaths.

And, the CFC released from refrigerators, Carbon dioxide released from vehicles, etc depletes the ozone layer, which in turn causes Global warming. The discovery of plastics and polythenes that are non-biodegradable decreases the fertility of the soil. Thus, Science has both achievements and challenges.

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