What is the main function of the cell membrane of a cell?
A. To organize the cell's internal contents
B. To limit the size that the cell can reach
C. To protect the cell from harmful substances in the environment
D. To exchange nutrients and the cell's wastes with the external
environment

Answer:

If that happens, you body will die soon

Explanation:

Answer:

fascillated diffusion

Explanation:

it so utilised by molecules that are unable to freely cross the phospholipid bilayer.

Answer: You cut off the answers-

Explanation:

Bacteria were infected with bacteriophages and it was found that it is DNA which is transferred from bacteriophage to bacteria and DNA is the genetic material of the cell.

From the year 1951 to 1952, Hershey and Chase conducted a series of experiments to find the role of DNA in the genetic heritability of traits in an organism. The Hershey and Chase experiments were performed using bacteriophages, or viruses that are capable of infecting bacteria, in order to determine whether the genes were made of proteins or DNA.

Since, phosphorus is present in DNA but not in the amino acids, radioactive phosphorus-32 was used to label the DNA in the T2 phage. And, radioactive sulfur-35 was used to label the protein sections of the T2 phage, because sulfur is present in the protein but not DNA.

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The atom represented by the model with one valence electron in its outermost shell is most likely to have the lowest ionization energy and hence is most likely to form a cation with a charge of +1.

The atom that has the lowest ionization energy is the one which is most likely to form a cation with a charge of +1. Ionization energy is defined as the energy required to remove an electron from an atom or ion in the gaseous state. Therefore, an atom with a low ionization energy requires less energy to remove its outermost electron and form a positively charged cation.

Among the models of atoms given, the atom represented by the model with one valence electron in its outermost shell is most likely to have the lowest ionization energy. This is because the valence electron is loosely held by the nucleus due to its large distance from it. As a result, it requires less energy to remove the outermost electron and form a cation with a charge of +1.

For example, Lithium (Li) has one valence electron in its outermost shell and has the lowest ionization energy among the elements in the first group. This makes it easy for Lithium to lose its valence electron and form a cation with a charge of +1.

In summary, an atom with a low ionization energy requires less energy to remove its outermost electron and form a positively charged cation.

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Note: The complete question is- Which of the following models of atoms represents an atom that has the lowest ionization energy, and is therefore most likely to form a cation with a charge of +1?

Answer:

The purpose of natural selection is not a conscious or intentional one, as it is not driven by a specific goal or purpose. Instead, natural selection is a fundamental process in biology that acts on heritable traits within populations over generations. It is a key mechanism of evolution.

Explanation:

The primary outcome of natural selection is the adaptation of organisms to their environment. Individuals with traits that are advantageous in a particular environment are more likely to survive, reproduce, and pass on those beneficial traits to their offspring. Conversely, individuals with traits that are disadvantageous are less likely to survive and reproduce, leading to a reduction in the frequency of those traits in the population over time.

Natural selection, therefore, acts as a filter that shapes the characteristics of populations, favoring traits that enhance an organism's survival and reproductive success in a given environment. Over many generations, this process can lead to the development of new species or the modification of existing ones, as populations accumulate adaptations that allow them to thrive in different ecological niches.

It's important to note that natural selection does not have an end goal in mind, nor does it necessarily lead to the "best" or most advanced organisms. Instead, it is a consequence of the interactions between organisms and their environment, constantly shaping and refining the traits of living beings based on their ability to survive and reproduce.

Answer:

NAD+ (nicotinamide adenine dinucleotide) is indeed crucial for ATP production, even in anaerobic pathways such as glycolysis followed by fermentation. Allow me to explain the significance of NAD+ and its role in ATP production.

During glycolysis, glucose is broken down into pyruvate, producing a small amount of ATP and NADH. The conversion of NAD+ to NADH occurs during the oxidation of certain molecules, including glucose, in the pathway. This conversion is essential because NADH carries high-energy electrons that can be used in subsequent steps to generate more ATP.

In aerobic respiration, NADH is further utilized in the electron transport chain (ETC) within the mitochondria. The ETC transfers electrons from NADH to oxygen, generating a significant amount of ATP through oxidative phosphorylation. However, in anaerobic conditions where oxygen is limited, like during fermentation, the ETC cannot function.

Here's where NAD+ becomes critical. In order to keep glycolysis running and continue generating ATP, the NADH produced during glycolysis must be converted back to NAD+. This allows glycolysis to continue producing ATP, even without the presence of oxygen. Without a mechanism to regenerate NAD+, glycolysis would halt due to a lack of NAD+, leading to a severe reduction in ATP production.

Fermentation pathways differ depending on the organism, but they all involve the regeneration of NAD+. For example, in lactic acid fermentation, pyruvate is converted into lactate, which involves the transfer of electrons from NADH to pyruvate, regenerating NAD+. Similarly, in alcoholic fermentation, pyruvate is converted into ethanol, again regenerating NAD+.

In summary, NAD+ is essential in anaerobic ATP production because it serves as a coenzyme that accepts electrons and facilitates the conversion of NADH back to NAD+. By regenerating NAD+, cells can sustain glycolysis and continue producing ATP, even in the absence of oxygen.

Answer:

Explanation:

There is no question to answer.

Photosynthesis is a biological process that occurs in plants, algae, and some bacteria. It is the process by which these organisms convert light energy from the sun into chemical energy in the form of glucose (a type of sugar).

Answer:

Explanation:

D

Answer:

The correct answer is - d) basal nuclei.

Explanation:

Basal nuclei is the area present at the base of the brain made up of four sets or clusters of nerve cells. It helps in the regulation of muscle tone essential for control of the contractions of the skeletal muscle movements and other body movements.

It is the part of the grey matter found in each cerebral hemisphere that has a major role in the initiation and termination of skeletal muscle movements. Its prevent the body from unwanted body movements.

The polarity of water molecules is crucial to the formation and stability of cell membranes. Without this polarity, water would not be able to form hydrogen bonds, interact with polar molecules, or form stable cell membranes .

Water molecules are composed of two hydrogen atoms and one oxygen atom, and they have a slight negative charge on one end and a slight positive charge on the other.

This arrangement is due to the unequal sharing of electrons between the atoms, with the oxygen atom having a stronger pull on the electrons than the hydrogen atoms. This phenomenon is called polarity, and it is crucial to the unique properties of water.

First, water molecules would not be able to form hydrogen bonds with each other, which are crucial for many of water's unique properties. Hydrogen bonds occur between the positive and negative ends of different water molecules and give water its high boiling point, high surface tension, and the ability to dissolve many substances.

Furthermore, the polarity of water molecules is crucial to the formation and stability of cell membranes. The hydrophilic, or water-loving, heads of phospholipids are attracted to the polar water molecules, while the hydrophobic, or water-fearing, tails face away from the water.

In summary, the polarity of water molecules is crucial to many of its unique properties and is essential to many biological processes. Without this polarity, water would not be able to form hydrogen bonds, interact with polar molecules, or form stable cell membranes.

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Answer:

A organism is most likely responsible for first producing oxygen in  Earth's early atmosphere is explained below in details.

Explanation:

The answer is little organisms identified as cyanobacteria or blue-green algae. These microorganisms carry photosynthesis: practicing sunshine, water, and carbon dioxide to compose carbohydrates and, yes, oxygen. Earth's oxygen but the largest (70%) of the oxygen in the environment is generated by oceanic plants. The ocean creates oxygen through the plants that exist in it.

Some seeds feature barbs or hooks that cling to an animal's skin, fur, or feathers. Birds can carry away the sticky seeds of plants like pittosporum.

Seeds from plants that rely on animals for distribution are made to fit either within or outside of the animal. Burr- or hook-shaped seeds can cling to an animal's fur. Plants give seeds that are carried internally an enticing fruit pulp reward in exchange for the journey.

Mangoes, guavas, breadfruit, carob, and several fig species are some examples. Aardvarks and the desert melon (Cucumis humifructus) share a symbiotic connection in South Africa, where the mammals consume the fruit for food.

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Answer:

D

Explanation:

Since algae is the start or the foundation of the food chain, this would mean that animals that eat the algae will be more commonly found here. And where their are consumers, predators are to follow.

Hope this helps :)

Answer:

D

Explanation:

Answer:

What you have there is a baby Pseudemy turtle (nick name for them: Cooters)

Explanation:

Here is a pic from online this is what they look like just like urs! They are friendly! <3 I have had one before they get as big as a 16 year old teenager's hand probably

Chaparral and savannas temperate broadleaf forests are biomes are maintained by fire.

A biome is described as a biogeographical unit consisting of a biological community that has formed in response to the physical environment in which they are found and a shared regional climate.

Chaparral or Mediterranean forests, woodlands, and shrub is a temperate biome that is composed of a variety of different types of terrain including plains.

A savanna is described as a rolling grassland scattered with shrubs and isolated trees, which can be found between a tropical rainforest and desert biome.

There is not enough rain falls on a savanna to support forests hence they are also known as tropical grasslands.

In conclusion, we have that Chaparral and savannas temperate broadleaf forests are biomes that are maintained by fire.

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Answer:  Front, When two different air masses meet, a front is formed. The boundary between these masses is called a stationary front. The air between the two masses never really combines.

The leaf acquires a blue-black coloration in the green part after the starch test.

The iodine-starch test is a chemical process used to detect the presence of iodine or starch.

Starch and iodine together produce a deep blue-black color.

To test a leaf for starch, a few drops of iodine solution are placed on a boiled leaf. If starch is present in the leaf, the iodine will react with the starch molecules and form a blue-black color complex. If starch is not present, the iodine will remain yellow or brown in color.

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One species gain from parasitic interactions while the other loses. Medical microbiology studies a large majority of parasitic, human tissue-eating bacteria. For instance, parasitic bacteria are responsible for cholera, leishmaniasis, and giardia.

Any coexistence of two or more biological species is referred to as symbiosis. These connections are typically long-lasting and have a significant effect on the fitness of either one or both animals. The advantages and physical characteristics of symbiotic interactions are classified. In nature, relationships in which both species profit are known as mutualistic relationships. Numerous instances of mutualistic bacteria in the stomach that support digestion in both humans and animals may be found in the field of microbiology. A relationship between species known as commensalism occurs when one species benefit and the other is unaffected.

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Answer:

a b and e

Explanation:

organism one gets its energy from the world while organism 4 gets it's energy from biotic life and its energy doesn't transfer anywhere else

Explanation:

traditional circulatory endpoints of resuscitation in shock include hypertension,tachycardia,decreased mentation and urine output

According to Chargaff's rule of base pairing | A | = | T | and | C | = | G | are correct about DNA.

Chargaff's rule:

It states that in the DNA of any species or any organism, there is always equity in quantity between the bases A and T and between the bases G and C.

Where A is adenine, T is thymine, G is guanine, and C is cytosine

It is also known as Chargaff's ratio, which was discovered by Erwin Chargaff at Columbia University.

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Although part of your question is missing, you might be referring to this full question:

According to chargaff's rule of base pairing, which of the following is true bout DNA

a. |A| = |T|, and |C| = |G|

b. |A| = |C|, and |T| = |G|

c. |A| = |G|, and |T| = |C|

d. |A| = |T| = [C] = |G|

Answer:

hope it helps

Explanation:

Loyalty is the most overvalued value. ... When people demand your loyalty what they're usually trying to do is escape accountability. I am not saying loyalty has no value but rather being loyal to people and organizations who do not keep their promises, maintain standards, play favorites or exploit you is self-destructiv