What is a living cell? ​

Answers

Answer 1

Answer:

Though they are often debated, there are eight main characteristics that define a cell as living.

The first is genetic code. All living things contain DNA, which is like the instruction manual for life. DNA is contained in each cell, and passed from parent to offspring.

The second is growth and development. Whether by creating more cells or creating more organelles within the cell, all living things grow and develop.

The third characteristic is reproduction. Reproduction can be sexual or asexual, but in the case of single cells, it is asexual.

The fourth characteristic is response. All living things, including cells, react to external stimuli, such as temperature or salinity.

The fifth characteristic is homeostasis. Homeostasis is the condition by which living things maintain a stable internal environment in the midst of an ever-changing external environment.

The last three characteristics go hand in hand, and are sometimes combined, but in my mind they are distinctly separate.

Sixth is consumption, which is taking in food and other materials. A cell specifically takes in molecules such as water or glucose during consumption.

Seventh is metabolism, which is using materials consumed in order to create energy. Living cells use enzymes to break down materials to produce ATP (adenosine triphosphate), which is usable energy.

Finally, all living cells undergo excretion in some form. Some examples in cells include exocytosis and osmosis.

These 8 characteristics, though often controversial, determine a cell as living.


Related Questions

I want to understand what is a strome !!!???​

Answers

Answer:

Do you mean the Stroke?

Explanation:

If you mean Stroke, it is a spongey transparent substance in a plant cell that helps support its function

If Sarah had skin vesicles on the anterolateral region of her neck, which peripheral nerve is infected by the virus? To which peripheral nerve plexus does this nerve belong

Answers

Answer: transverse cutaneous nerve

- cervical plexus

Explanation:

The peripheral nervous system refers to the network of the motor and the sensory nerves which helps in connecting the brain and spinal cord to the entire human body. The peripheral nerves control movement, sensation, and motor coordination.

If Sarah had skin vesicles on the anterolateral region of her neck, the peripheral nerve affected is the transverse cutaneous nerve. The transverse cutaneous nerve innervates the skin which covers the anterior cervical region and it brings to the cervical plexus.

White petal color is a recessive trait.

Answers

Answer:

An example of a dominant trait is the violet-colored flower trait. For this same characteristic (flower color), white-colored flowers are a recessive trait.

Explanation:

write the function of eustachian tube?

Answers

Answer:

Equalized air pressure.

Explanation:

The function of eustachian tube enables air pressure to be equalized between the outside air and the middle ear cavity. The eustachian tube also known as pharyngotympanic tube that connects the middle ear cavity with the nasopharynx. Eustachian tube is responsible for the aeration of the middle ear system as well as clears mucus from the middle ear into the nasopharynx. Opening and closing functions of the eustachian tube are is very important.

Which two physical properties of graphite make it a good mineral for use in pencils?
1. luster and fracture
2. cleavage and color
3. hardness and streak
4. greasy feel and composition

Answers

The answer is 3 3 3 3

The physical properties of graphite which makes it good for pencils is ;  

( 3 ) hardness and streak

Graphite is made up of carbon atoms which are held together by van der waals forces ( weak force ). They are soft and slippery which is why graphite is used in the manufacture of  lubricants. while graphites are used for the manufacture of writing materials such as pencils because of its hardness and streak

Hence we can conclude that the physical properties of graphite which makes graphite good for the production of pencils are hardness and streak

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During which days of the menstrual cycle does the level of FSH increase?

Question 1 options:

FSH increases before the menstrual cycle is finished around day 27.


FSH rarely increases during the menstrual cycle, it stays level unless the follicle has been implanted.


FSH increases during the follicular stage of the ovarian cycle (between day six and day fourteen).


FSH increases during the follicular stage of the ovarian cycle (between day one and day six) and then peaks on the 13th day.

Answers

Answer:

option (C) is correct answer

Flows of energy and cycles of nutrients link the biotic and abiotic components of ecosystems into a/an __________ system, ultimately structuring the feeding relationships, or __________ structure of organisms that inhabit them.

Answers

Answer:

The correct answer is - dynamic and trophic.

Explanation:

A/an dynamic system is linked to lows of energy and cycles of nutrients link the biotic and abiotic components of ecosystems that structure the feeding relationships, or trophic structure of organisms that inhabit them. The trophic structure is the position of the organism in the ecosystem and food chain.

The correct answer is - dynamic and trophic.

Describe how oxygen is transported in blood, and explain how temperature, pH, BPG, and affect oxygen loading and unloading.

Answers

Solution :

The flow of oxygen in the blood is been transported by two ways :

1. in plasma 1.5%

2. bound to hemoglobin 98.5%

As the oxygen loads in the body, affinity of the Hb makes the oxygen loading very efficient in the blood. The Hb molecule gets saturated when all the 4 hemes are oxygen binded.

The decreased pH weakens the hemoglobin oxygen binding in the tissues.

Higher temperatures in the oxygen means a lower affinity and thus more oxygen is released and so the oxygen unloads.

Increase in the temperature, the BPG and the modification of the structure in the hemoglobin decreases the affinity for the oxygen and further enhances the unloading of the oxygen in the blood.

g An Hfr strain is produced when Select one: A. an F episome is transferred to a new cell. B. an F episome leaves the E. coli chromosome. C. an F episome leaves the host chromosome and removes some of the host chromosome. D. an F episome integrates into the E. coli chromosom

Answers

Answer:

A. an F episome is transferred to a new cell.

Explanation:

Hfr strains arise from the integration of the plasmid into the bacterial cell in one of several ways such as the recombination of events. Most commonly are formed by the UV-induced integration of E coil F factor. It tries to transfer a copy of the F factors as well the entire chromosome to the recipient bacterium.

__________________ moves the respiratory medium over the respiratory surface.

Group of answer choices

perfusion

percolation

ventilation

diffusion

Answers

Answer:

ventilation

Explanation:

Breathing, also known as ventilation, is the process of moving air or water in order to facilitate the gas exchange between the external and internal (body) environment, mostly to eliminate carbon dioxide (CO2) and bring in oxygen (O2). For example, fish are aquatic animals that need to run water over their gills to get the O2 that they need to survive (gills are organs that create a large surface area for ventilation). Moreover, insects ventilate their tracheal system to get O2. Finally, terrestrial vertebrates (i.e., amphibians, reptiles, birds, and mammals) use organs called lungs to exchange O2 and CO2 between their cells and the external environment.

Which of these actions is likely to prevent the spread of pathogens in the environment?

Washing hands once a week
Coughing out loud
Touching wounds
Washing fruits

Answers

Washing fruits because by washing you will decrease the bacteria’s

Answer:

A or D

Explanation:

Coughing out loud  and Touching wounds will spread it, not prevent it, Its most likely D, because only washing your hands once a week is basically useless and will prevent little- to nothing so washing fruits is your best bet I would go with D

Albinism is a recessive trait where an individual does not produce the pigment melanin. A man and woman who both produce melanin have one child out of three who has albinism. What are the genotypes of the man and woman

Answers

it’s just because the answer is this melanin both of them have it

Albinism is a recessive trait where an individual does not produce the pigment melanin. Albinism is an autosomal disease where the gene which is expressed here is having albinism which is the cause of heterozygous condition.

What is the heterozygous ?

Heterozygous is the condition where the genes in the alleles are different to each other where one has a dominant character and one has a recessive character. The genotypes of the woman and man decide the genotype of the offspring.

The genotypes of the man and woman is heterozygous where the dominant once out of 3 will have the dominant traits for the albinism. The condition will have to be heterozygous as in the Ia Ii gene where the gene for the albinism   will be i gene.

The same genotype for the male where the Ib i gene in which i i the albinism carrying gene here the ii condition of the gene will express the albinism.

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Why do you think it’s a challenge to reduce fossil fuel usage in homes in the United States? How could the use of fossil fuels affect the biodiversity in neighborhoods and the surrounding ecosystems?

Answers

Answer:

Well,for starters fossil fuels have been there since the beginning of the country's life style in using it.Eg;for household used such as cooking.

Explanation:

The used of fossils may affect the surrounding biodiversity,and ecosystem due to the amount of Carbon Dioxide they emitted when being lit,which contributes to Ozone Depletion,and other global issues

Which area appears only on the posterior part of the body? a)scapular b)patellar c)umbilical d)sternal

Answers

Answer:

Patellar

Explanation:

Answer:patellar

Explanation:

On the posterior side

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Answers

Answer:

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the impact of grassroots challenges to trash incinerators​

Answers

Yea the impact of grassroots challenges to trash incinerators ;)

Part B
Next, our galaxy can be organized into a galaxy group. This galactic group is a collection of about 50 galaxies that are
gravitationally bound to each other. What is the name of the galaxy group in which our galaxy belongs? As you are
researching, list at least three characteristics that you learned about our galaxy group.

Answers

Answer:

The Milky Way galaxy is part of a group of galaxies called the Local Group. Three characteristics that I learned about our galaxy group is The Milky Way is a large barred spiral galaxy, they come in a variety of shapes and sizes, and  it appears as a milky band of light in the sky when you see it in a really dark area.

Explanation:

Edmentum

The Milky Way galaxy is a member of the Local Group of galaxies named Laniakea . The Milky Way is a massive barred spiral galaxy and  can be seen as a milky band of light.

What are the characteristic feature of the Milky Way?

The Milky Way galaxy is a massive, flat, disk-shaped collection of stars, gas, and dust that spans around 100,000 light-years and is several thousand light-years thick.

The Milky Way galaxy contains every star that we can see with our unaided eyes. The Andromeda Galaxy is the only celestial object visible in the night sky with unaided eyes that is not part of the Milky Way.

It is estimated that the Milky Way is 12 billion years old.

Thus, Milky Way is the galaxy we live in amongst others.


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Methanogens are able to live in what enviroment

Answers

Methanogens are found usually in swamps and marshes. Because they dont require oxygen they are able to live in anaerobic conditions

Who was Dr. Joseph Bell?

Answers

Answer:

Sherlock Holmes

Explanation:

He was the inspiration. Not the actual Holmes.

Answer:

Joseph Bell  (2 December 1837 – 4 October 1911) was a Scottish surgeon and lecturer at the medical school of the University of Edinburgh in the 19th century.

nucleotides are the basic
unit for which macro molocules

Answers

The correct answer to question is Nucleic Acids, (DNA) AND (RNA).  

hope this helps let me know.

i’m sorry i don’t know the answer this

Sigmoidal plots of activity versus substrate concentration are exhibited by a. holoenzymes. b. Michaelis-Menten enzymes. c. allosteric enzymes. d. monomeric enzymes. e. isozymes.

Answers

Answer:

The correct answer is C

Explanation:

Allosteric enzyme is an enzyme that has more than one active site on the surface of the enzyme. Generally, the binding to one of these active sites affects the affinity of the other active sites on the enzyme; this causes the enzyme not to follow the Michaelis-Menten's enzyme kinetics. Thus, when the activity versus substrate is plotted on a graph, a sigmoidal curve shown instead of an hyperbolic curve (like other enzymes).  

Which is NOT true of smooth muscle? A. They use peristalsis to move substances through tubes. B. They are found in the hollow parts of the body such as blood vessels and the small intestine. C. They can become fatigued. D. They are connected by gap junctions.​

Answers

Answer: the answer is C

Explanation: I been trying to find the same answer for this exact question for acellus and C was the correct answer

"During cytokinesis of an animal cell, a cell plate grows from the center moves outward"
True
False

Answers

Answer:

True

Explanation:

The eurkaryotic cells glycocalyx is..?

Answers

Explanation:

The glycocalyx is a carbohydrate-enriched coating that covers the outside of many eukaryotic cells and prokaryotic cells, particularly bacteria .

What is the role of DNA polymerase enzymes in replication?

(A) unzipping the double helix by breaking down the hydrogen bonds

(B) adding the free nucleotides to the complementary strand of DNA

(C) splitting the DNA molecule

(D)connecting the fragments on the lagging strand of DNA

Answers

Answer:

A

Explanation:

the function of DNA polymerase is to unzip the double helix structure of DNA by breaking down the weak hydrogen bond

Answer:

(B) adding the free nucleotides to the complementary strand of DNA

Explanation:

A DNA polymerase is an enzyme capable of creating new DNA molecules by sequentially adding nucleotides to the three prime (3')-end of a DNA strand. A DNA strand is a polynucleotide chain composed of a linear series of nucleotides, each consisting of a deoxyribose sugar, and phosphate, and a base (i.e., thymine, guanine, cytosine and adenine). Before a cell starts to divide, it needs first to replicate its genetic material by using DNA polymerases that duplicate the cell's DNA during the interphase (S phase). During this process (DNA replication), an enzyme known as helicase unwinds the DNA molecule, which is made up of two antiparallel strands oriented in opposite 3′-5′ directions to each other. Subsequently, each strand is used as a template for its replication through DNA polymerases that can add nucleotides (one at time) to an existing short fragment of RNA, i.e., the primer sequence, which is paired with the template DNA strand.

What is the closest crop relative of Aloe vera?

Answers

Answer:

lily

Explanation:

aloe perryi

i’m not 100% sure try researching

What is physiological?

Answers

relating to the branch of biology that deals with the normal functions of living organisms and their parts.
The above answer is correct

What is the answer with explaining

Answers

Answer:

actually I'm not even sure but I would say that the wife cheated

Sets the metabolic rate for the cells of the body describes

Answers

Answer:

BMR ;  Basal Metabolic Rate

Explanation:

MR is  the rate of energy expenditure per unit time by endothermic animals at rest....

Metabolic comprises the process that the body needs to function.

Basal metabolic rate is the amount of energy per unit of timethat a person  needs to keep the body functioning at rest

how does Fibrocartilage receive it's nutrients?

Answers

Answer:

These cells receive nutrients through a double diffusion barrier but rely on anaerobic respiration due to low oxygen concentration.

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How does Heinz feel after telling his co-worker Harry about his sons birth? In a desert ecosystem a species of herbivores died out because the organisms developed a disease. a few months later a larger carnivores species also experience a population decline that was directly related to the change in the herbivore population, whats the most likely cause for this declined?A. The carnivores and the herbivores competed for the same food supplyB. The carnivores prayed on the herbivores foodC. The carnivores depended on the herbivores for living spaceD. The carnivores and herbivores competed for the same mates Find the decay factor from the model y =4520(0.6)square 6 What does Jefferson say about whether the US Constitution allows for an agreement such as the Louisiana Purchase? What does x stand for in the equation 1+x=2 List three potential effects of errors occurring during meiosis. Sixty out of every 100 pieces of candy is red. Which Indicates theproportion of red candies? 6060/10060/4040/100 Pleaseeee helppppppp Harvey quit his job at State University where he earned $45,000 a year. He figures his entrepreneurial talent or forgone entrepreneurial income to be $5,000 a year. To start the business, be cashed in $100,000 in bonds that earned 10% interest annually to buy a software company, Extreme Gaming. In the first year, the firm sold 11,000 units of software at $75 each. Of the $75, $55 goes for the costs of production, packaging, marketing, employee wages and benefits, and rent on a building.Required:What's the economic profit generated by Extreme Gaming in the first year? The business management department at a local university began posting all assignments and other class materials to a learning management course website instead of creating a packet or printed materials for students to purchase each term. The business management department is implementing a ________ innovation. Group of answer choices product reactive policy breakthrough process Determine whether the three points are colinear (0,-4),(-3,-18),(2,6) are the three points colinear? Write a linear equation in point slope form that passes through the points (-2,18) and (1,9) Which of the following is equivalent to (x+5)(2x^2 +8)?A. (x+5)(2x^2) (X+5)(8)B. (x+5)(2x^2)+(x+5)(8)C. (x+5)(2x)+(x+5)(8)D. (x+5)(2x) (x+5)(8) Do you think it would be ethical for a CPA to have someone else do for them what they are prohibited from doing by the AICPA Code of Professional Conduct? Solve for the missing angle. Round to the nearest degree. What are the fractions simplest form 3. If nominal GDP and real GDP both drop by 10 percent, then the GDP deflator Question 3 options: also rises by 10 percent rises by about 20 percent falls by 10 percent is unchanged ze short answer. Write a brief paragraph on Newness of Our Society'. (Compare the types of building, life style, belief, attitudes, education, etc A high school baseball player has a 0.305 batting average. In one game, he gets 9 at bats. What is the probability he will get at least 7 hits in the game A customer is in the process of developing an independent government estimate for a requirement that is commercially available. Chose the category below that they will most likely use while developing the estimate a. Travel b. Labor hours c. Cost per hour d. Catalog price