How do membrane proteins contribute to the membrane potential?

Answer:

(a)The strength of natural fibers is very less as compared to synthetic fibers.  Natural fibers are heavy in weight.  Natural fibers can be damaged by moths and other insects.  These fibers are not wrinkle-free.  These fibers are not long lasting and hence not durable.

(b)  Cellulose is termed as polymer because it is made up of many monomer units.

(c) Rayon is first man- made fibre it is known as artificial silk because it have properties that are similar to silk.

(d) Rayon possesses many properties of natural fibers since it is a semi-synthetic fiber. Nylon is a synthetic fiber and has properties that are completely different from natural fibers. The key difference between rayon and nylon is their resistance to wrinkles and tears.

(e) Nylon has since become a popular choice, as it has excellent wind resistance, good elasticity, mildew resistance, and is comparatively cheaper. The material is also lightweight and dries quickly.

(f) When the piece of cotton is burnt then it burns completely and produces no odour or smell. When nylon is burnt, It completely burns and produces burning paper like odour. When nylon is burnt then the nylon is completely shrink and starts to melt first and then produces odour during the time of burning

Photosynthesis is a chemical reaction that takes place in the chloroplasts of green plant cells, where light energy is used to convert carbon dioxide and water into glucose and oxygen. Option A is the right answer.

Photosynthesis is the process by which green plants prepare their own nutrients with the help of sunlight, water, and carbon dioxide.

Hence Option A is the right answer.

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Answer:

a) Presencia de un catalizador

Explanation:

Los dos tipos de cambios que experimentan las sustancias en la química son cambios químicos y físicos.

Un cambio físico es un cambio es un cambio en el que la sustancia cambia en su apariencia o su forma de una manera que es reversible y en la que no se forma una nueva sustancia.

Un cambio químico es aquel en el que hay un cambio en las sustancias presentes y se forma una nueva sustancia.

La evidencia de que ha tenido lugar un cambio químico incluye

1) La formación de un precipitado a partir de la mezcla de sustancias.

2) Un cambio en el color de las sustancias.

3) Un cambio en el olfato (que desprende un olor) o en el sabor.

4) La sustancia produce luz (brilla)

5) El volumen total cambia

6) Cambio de temperatura (la mezcla se calienta o enfría)

Por lo tanto, la presencia de un catalizador, que es una sustancia que no participa en una reacción pero aumenta la velocidad de reacción, no es evidencia de una reacción química.

Finches have adapted different beak sizes and shapes because they eat different foods. So the correct option is C.

Natural selection is a mechanism for evolution to happen. It is the process by which living organisms acquire certain characters according to their needs.

It is important to understand natural selection to understand the essential concepts of the processes by which living organisms have been able to develop the complex structures which are helped them to survive.

Natural selection results from various conditions of environment, ecosystem and heredity. An example of natural selection is the development of antimicrobial resistance to pathogens.

Finches are known to have developed different sizes and shapes of beaks according to the kind of food that they eat. If they fed on insects, they had long and pointed beaks. If they fed on seeds and nuts, they had broad and blunt beaks.

Therefore the correct option is B.

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Answer:B an abstract of the study

Explanation:

Answer:

hope this answer help you

Answer:

it is cytosine part of deoxyribonucleic acid

Heart and lungs are the  two organs that are made up of all four tissues.     secretion, movement, strength, excretion and communication are the main functions of tissues.

Tissues are the same type of group of cells which have the same structure and functions together in a unit. Connective tissue, epithelial tissue, muscular tissue, and nerve tissue are the four fundamental forms of tissue. Other tissues are held together and supported by connective tissue bone, blood, and lymph tissues.

All body surfaces are covered in epithelial tissues, which also line bodily cavities and hollow organs and make up the majority of glandular tissue. Connective tissues are presents in the blood cells in the human body. Loose connective tissue, adipose tissue, dense fibrous connective tissue, elastic connective tissue, cartilage, osseous tissue, and blood are further more tissues in the body.

Thus, Heart and lungs are the  two organs that are made up of all four tissues.    

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Answer: A. Chromosomes are duplicated.

Explanation: This is the correct answer on the quiz.

Chromosomes are duplicated in S phase. Therefore, option (A) is correct.

What do you mean by S phase?

Between G1 phase and G2 phase, DNA replication takes place during S phase of the cell cycle. The processes that take place during S-phase are tightly controlled and highly conserved.

The cell replicates its genetic material entirely during the S phase of DNA synthesis; At the end of S phase, a normal diploid somatic cell with a DNA complement of 2N acquires a DNA complement of 4N.

DNA synthesis or replication occurs during the S phase of the cell cycle, which occurs prior to the interphase. Before entering mitosis or meiosis, the cell's genetic material is replicated in this manner, leaving enough DNA for daughter cells to divide.

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Answer:

i cant understand

Explanation:

because your language in vietnam

Answer:

The solar wind is a plasma, a stream of charged particles (ions and electrons) that are continuously escaping from the Sun into the interplanetary medium.

In the atom, the arrow 1 depicts the proton. The arrow 2 depicts the neutrons, and the arrow 3 depicts the electrons. All three of these are subatomic particles.

An atom is the fundamental structural unit of matter. It consists of protons, neutrons, and electrons. Electrons are negatively charged particles that are present outermost shell of the atom, while protons are positively charged particles that make up the core of the atom. The neutron doesn't have any charge.

Both neutrons and protons make up the core of an atom, while electrons revolve around them. A neutral atom has equal numbers of protons and electrons. Example: the sodium atom.

Hence, the atom showing arrow 1 is a proton, arrow 2 is a neutron, and arrow 3 is an electron.

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Answer:

Developing countries don't have lots of industries, so it's not high

Developed nations have a wide variety of industries

Explanation:

Answer:

3. In the two-kingdom classification following are drawbacks:-

Explanation:-

Hope my answer is helpful.. If yes, plz mark me as brainliest

Answer:

A

Explanation:

Because it is giving you the same results ( i just did the test and got it right)

Answer:

a.

Explanation:

just took the test

Answer:

Feathers initially evolved in a role associated with sexual selection.

Explanation:

In species where only males had feathers, these feathers can be considered to have evolved into a role associated with sexual selection. This is because in these species, males used their feathers as a sexual attraction for females, in this case, females chose the males that had more attractive feathers to mate and generate new individuals for the species. An example of this can be seen in the peacock, where the tail with lush feathers is only present in males and is intended to sexually attract females.

Answer:

Enterococcus.

Explanation:

Enterococcus is reason for nosocomial infection with predilection for older patients with multiple comorbidities. It is usually caused by longer stay in hospital.  The infections may include urinary tract infections, wound infection and intra abdomen or pelvic infections.

Answer:

water

Explanation:

Answer:

Water

Explanation:

Yes. Every chemical reaction obeys the law of conservation of mass.

Believe it!!

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Answer:Oxygen is DEPLETED

Explanation:

Answer: Gene that arose through gene duplication, but by acquiring mutations became nonfunctional.

Explanation:

A gene is a functional unit of heredity formed by DNA. They possess a sequence of nitrogenous bases that during translation is read by ribosomes to produce molecules called proteins.  A pseudogene is a DNA sequence that resembles a gene, but which has been inactivated in the course of evolution by mutations in its sequence. Thus, it is a gene that derives from other known genes and whose functions are different, may have lost their functionality or have radically changed it. To this day, it is not known exactly how pseudogenes are created, however some theories are as follows:

1. A gene duplication can generate two copies of a gene when only one is needed. A mutation would then occur that deactivates one of the copies. In addition, the duplication event may not be complete, so that the copy has incomplete promoters.  

2. They may be fragments of the messenger RNA transcript of a gene may be spontaneously reverse transcribed and inserted into the chromosomal DNA. They lack the promoters of normal genes, so they are not expressed normally.

3. A gene may become non-functional or inactivated if such a mutation becomes fixed in the population. This can occur by normal means such as natural selection or genetic drift.

Answer:

The pumping of the heart involves the alternate contraction and relaxation of the chambers of the heart. The upper chambers of the heart are called at atria and the lower chambers of the heart are called ventricles.

Answer:

nalaqdua

Explanation:

sbospka ai9wlhzux5 s8fvekg

Answer:

can you please translate for us into English

Answer:

electrical waste management and deforestation

Answer:

all you're trying to do is create a histogram of what has happened in the past and what could happen in the future.

Explanation:

for example and AD you feel the first little bar because it's not more than a billion and its last therefore it would be the zero billion

and then for 1850 you feel to bars because they had 1 billion people so therefore you feel the 0 billion and the 1 billion part

Answer:

Pacific Ocean

Explanation:

here is your answer