ANSWER FAST Which statement about cell theory is INCORRECT? New cells are spontaneously created from existing cells. All organisms are composed of one or more cells. Cells are the basic unit of life and structure. New cells are created from existing cells.

Answers

Answer 1
New cells are spontaneously created from existing cells

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(05.05 MC) Exposing human subjects to experimental manipulations such as high levels of toxins is unethical. We often use model organisms for this reason. What attributes would you look for in selecting a good model organism for investigating the impact of toxins in humans? A good model organism should be able to be easily maintain in the laboratory, be fast growing, with a fast generation time and be as closely related to humans as possible. Cost is the only consideration in selecting a model organism, since all living things are made of cells anything found will apply to humans. The best choice will must be the very closely related to humans, such as chimps, since anything found in other species will not apply to humans. The most important consideration in selecting a model organism is how the public will feel about doing experiments on that species, so the best choice would generally be a very simple organism like bacteria that people don't care very much about.

Answers

Answer:

A good model organism should be able to be easily maintain in the laboratory, be fast growing, with a fast generation time and be as closely related to humans as possible.

Explanation:

The attributes that should be looked for in the selection of good model organism for investigating the impact of toxins in humans include:

Easy maintenance: The easier the maintenance of the organism, the better for both the research and the researcher. More can be achieved with less effort as opposed to high maintenance animals.Fast generation time: They should be able to grow and reproduce quickly so as not to prolong the experiment for too long. The lower the regeneration time, the shorter the time required to obtain adequate data for the research.Genetical similarity to humans: A good model organism for humans related study must share some similarities with humans at the genetic level. The more the genetic similarity, the more applicable the outcome of the research on humans.

Hence, a good model organism should be able to be easily maintained in the laboratory, be fast-growing with a fast generation time, and be as closely related to humans as possible.

What characteristic of sexual reproduction did Mendel investigate that resulted in offspring expressing characteristics that differed from their parents?

Answers

Explanation:

Mendel crossed two unlike parents to get offspring with characterestics that differ that of the parents

Mendel used the characteristic of sexual reproduction in which the genes from the two parents combine to form the offspring. This results in offspring expressing the characteristics that differed from their parents.

What is Sexual reproduction?

Sexual reproduction is a type of reproduction in which the production of new organisms occur by the combination of genetic information of the two parents or individuals of different sexes. In most of the species, the genetic information is carried on the chromosomes in the nucleus of reproductive cells called gametes, which fuse to form a diploid zygote in the organism which matures to form a complete organism.

Mendel called the material which is responsible for the characteristics as "factors", and he proposed that during sexual reproduction, each of the parent contributed a form of this factor to the resulting offspring. This combination of the parental factors then determined which form of a trait will be visible in the offspring.

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How would the world be without atoms?

Answers

without atoms, the chemical elements wouldn't exist. then, molecules, then proteins, then life itself. basically we're made out of atoms just like everything else.

HELPPPP!!!!! Based on the diagram above, which of the following correctly describes the function and components of layer A?

A) movement; villi, blood vessels, lymphatic vessels

B) movement; muscles and connective tissue

C) absorption; villi, blood vessels, lymphatic vessels

D) absorption; muscle and connective tissue

Answers

Answer:

The correct answer is option C.

Explanation:

The given diagram is the representation of small intestine which is responsible for the absorption. The mucosa layer is the innermost layer of lumen of the small intestine that consist villi with blood vessels and lymphatic vessels.

The villi are the structure that are responsible for the absorption of food in the intestine by increase the surface are.The blood vessels and lymphatic vessels that are found near them takes the nutrient absorbed to the body.

Thus, the correct answer is option C.

The hydrosphere does not overlap with any other spheres true or false

Answers

Answer:

False

Explanation:

It overlaps with the lithosphere. Since some rocks produce water.

Answer:

False

Explanation:

Drag each label to the correct location on the table. Each label can be used more than once.
Identify the voice used in each sentence.
Sentences
Voice
Phil went to a movie with his friends.
The peanut butter is being added
to the cake by the chef.
The blue dress had been put on
display by the store assistant.
Karl gave a touching speech at his
graduation ceremony.
Jacob's party will be attended by
everyone in town
Fred played with a monkey during
his first trip to a zoo
active
passive

Answers

Answer:

1. Phil went to a movie with his friends - active voice

2. The peanut butter is being added

to the cake by the chef - passive voice

3. The blue dress had been put on

display by the store assistant - passive voice

4. Karl gave a touching speech at his

graduation ceremony - active voice

5. Jacob's party will be attended by

everyone in town - passive voice

6. Fred played with a monkey during

his first trip to a zoo - active voice

Explanation:

In English language, the voice of a sentence can either be passive or active.

A sentence is said to be ACTIVE if the subject is performing the action (verb). Hence, the sentence is referring to the subject doing the verb's action directly. For example;

1. Phil went to a movie with his friends

2. Karl gave a touching speech at his

graduation ceremony

3. Fred played with a monkey during

his first trip to a zoo

These are examples of sentences (1,2,3) in active voice because the subjects are performing the actions in the sentence.

On the contrary, a sentence is in the PASSIVE VOICE when the subject is acted upon by the verb in the sentence. In other words, the subject becomes the receiver of the veeb's action. For example;

4. The peanut butter is being added

to the cake by the chef

5. The blue dress had been put on

display by the store assistant

6. Jacob's party will be attended by

everyone in town

The above examples (4,5,6) are all in passive voices because the subjects in the sentences are acted upon by the verbs.

the definition in a cladogram

Answers

Answer:

a branching diagram showing the cladistic relationship between a number of species

Durante la explosión de una planta nuclear como la ocurrida en Chernóbyl en 1986, una persona se expone por un tiempo a esta radiación ¿qué daños a nivel molecular (ADN O ARN) podría sufrir? Y ¿cómo afectaría esto su salud y a la de su descendencia?

Answers

Answer:

mediante mutaciones en el ADN  

Explanation:

El desastre ecológico de Chernóbil estuvo asociado a la liberación de importantes cantidades de radiación en forma de radioisótopos hacia la atmósfera, como producto de la explosión de un reactor que contenía toneladas de uranio radiactivo. La exposición a este tipo de radiación aumenta las probabilidades de sufrir mutaciones en la molécula de ADN. Dicho de otro modo, la radiación incrementa las chances de sufrir cambios en el material genético hereditario. Las mutaciones generalmente son corregidas por los mecanismos de reparación del ADN; sin embargo, existen ocasiones donde las mutaciones no son reparadas. Por otro lado, las mutaciones a menudo tienen efectos deletéreos y por lo tanto están asociadas a enfermedades, ya que los cambios en la secuencia genética provocan consecuentemente también cambios en las proteínas codificadas por estos genes. Por ejemplo, las mutaciones sufridas por genes supresores de tumores se encuentran asociadas a la aparición de células cancerosas por el mal funcionamiento de dichos genes. El efecto de la mutación depende del tipo celular que sufre la mutación: aunque las mutaciones sufridas por células somáticas pueden afectar la salud, estos tipos de mutaciones no son heredadas (simplemente porque las células somáticas no se heredan), mientras que las mutaciones sufridas por células germinales, es decir, en las células encargadas de la formación de gametos, pueden ser transmitidas a la descendencia.

Which of the following describes a positron emission tomography (PET) scanner? 1: A device that uses magnetic fields to produce images of brain structures 2: A device that uses magnetic fields to measure blood flow 3: A device that uses radioactive fluid to determine the active areas of the brain 4: An X-ray device that can create a 3D model of the brain

Answers

Answer:

3: A device that uses radioactive fluid to determine the active areas of the brain

Explanation:

A positron emission tomography (PET) scan is an imaging test that helps reveal how your tissues and organs are functioning. A PET scan uses a radioactive drug (tracer) to show this activity. This scan can sometimes detect disease before it shows up on other imaging tests.

Depending on the type of exam, the radiotracer is injected, swallowed or inhaled as a gas. It eventually accumulates in the area of the body under examination. A special camera or imaging device detects radioactive emissions from the radiotracer. The camera or device produces pictures and provides molecular information.

What is the function of the nucleus? A. Builds proteins B. Stores the cell's glucose C. Stores the cell's DNA D. Produces energy for the cell by respiration

Answers

Appropriate Answer:

[tex] \large{ \boxed{ \bf{ \pink{Stores \: the \: cell \: DNA(C)}}}}[/tex]

Nucleus is the control centre of the cell and manages all the cellular activities taking place inside the cell. It consists of four parts :-

Nuclear membrane, Nucleoplasm, Chromatin material and Nucleolus.

The Chromatin material(Condensed - Chromosome) stores the cell's DNA which is transmitted to next generation.

C, Stores the cells DNA

Why do turtles hv paddle like flippers ?

Answers

Answer:

The answer is

Explanation:

Turtles have paddle like flippers to push back water while swimming.

Answer:

Turtles hv paddle like flippers so that they can push the water backward, move forward and swim easily

Does human have link with their genes(from their family)?

Answers

Answer:

Yes genes are the features of either the mother of father

Explanation:

Yes genes are features of other parents genes

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8
9
The ability of an organism to change internally or externally in relation to changes in the environment is called
complexity
heredity
o homeostasis
reproduction
NEXT QUESTION
ASK FOR HELP

Answers

Answer:

Homeostasis would be the answer out of those choices.

Explanation:

This is because they are adapting to their environment to ensure that their normal internal state is maintained.

From Scenario t What is the Dependent Variable? *
the flower
the flower color
O the flower with no fertilizer
when the flower blooms

Answers

Answer:

The flower color

Explanation:

Answer:

The flower color

Explanation:

After school, Kai feels hungry and tired. He finds some sugar cookies in the cabinet and finishes the whole package.
Which statements best describe the role of glucagon and insulin in this scenario?
O Glucagon was secreted by his pancreas before he ate the cookies because his blood glucose was low. Insulin
was secreted after he ate the cookies because his blood glucose was high.
O Insulin was secreted by his pancreas before he ate the cookies because his blood glucose was low. Glucagon
was secreted after he ate the cookies because his blood glucose was high.
O Glucagon was secreted by his pancreas before he ate the cookies because his blood glucose was low. After he
ate, insulin from the cookies increased his blood sugar levels.
O Insulin was secreted by his pancreas before he ate the cookies because his blood glucose was low. After he ate,
glucagon from the cookies increased his blood sugar levels.

Answers

Answer: Option A) Glucagon was secreted by his pancreas before he ate the cookies because blood glucose was low. Insulin was secreted after he ate the cookies because his blood glucose was high.

Explanation:When Kai was hungry and his blood glucose level was decreasing, glucagon is the hormone which was secreted by the islets of pancreas to increase the blood sugar levels in his body. Glucagon forces the liver to release the stored glucose in it, which increases the blood glucose level in the body. When Kai ate the sugar cookies there was enough of blood glucose available for his body, also it exceeded the requirement and went high. Insulin was then secreted to control this excess glucose from the islets of pancreas. As it helps the body cells to absorb the glucose and lowers the amount of glucose in the blood. It makes the cell available with the glucose to produce energy and perform their activities.

In short, glucagon and insulin both are secreted by the same organ which is islets of pancreas. But they differ in their function, glucagon increases the blood glucose when the body needs it, whereas insulin helps to absorb the excessive glucose and stores that in the body. Both are the hormones which help in regulating the body glucose levels.

During  process of digestion which takes place in digestive tract statement which describes role of glucagon and insulin is glucagon was secreted by  pancreas before he ate the cookies because his blood glucose was low. Insulin was secreted after he ate cookies because his blood glucose was high.

What is digestive tract?

It consists of the gastrointestinal tract along with the accessory organs which are present in digestion process . It involves the breakdown of complex food into smaller components which can be easily assimilated and absorbed by the body.

The digestion process has 3 phases: cephalic phase , gastric phase and intestinal phase.Cephalic phase begins with secretion of gastric juices from gastric glands in response to sight and smell of food.It involves chewing and chemical breakdown of food by the action of digestive enzymes ,saliva in the mouth contain enzymes like lipase and amylase which are secreted by the salivary and serous glands present on the tongue.

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If a vaccine protects you for most of your life against a particular pathogen, why do you need a new flu shot every year? A. Influenza evolves very quickly and its antigens mutate so that your memory cells from the last vaccine won’t recognize it. B. Influenza is so strong that you need a booster every year to make sure your body can fight it. C. Influenza is a virus, and vaccines only generate memory cells for bacterial infections. D. You don’t need it every year, it is just offered every year for anyone who does not have it yet.

Answers

Answer:

If you got a flu shot this year, next year you'll need it again.

Explanation:

This is because the virus changes, usually rendering the previous year's vaccine partly or totally useless. hope this helps you :)

Answer:

A.

Explanation:

Influenza evolves very quickly and its antigens mutate so that your memory cells from the last vaccine won’t recognize it.

The 2020 influenza vaccine was not as efficient because scientists were scrambling to put out a vaccine for Coronavirus. Consequently, Coronavirus cases skyrocketed during the flu season.
Hope this helped!

also.. i have to put coronavirus and not "c0vid-19" because apparently it's too political. lol.

What features do plant cells have in common with animal cells?

Answers

Answer:

they both are cells boom

Explanation:

they kinda different do

A living microorganism or its toxin may cause human disease that is transported through the US MAIL MUST be marked as a:________.A. MordantB. VirusC. InfestationD. Etiologic agent

Answers

Answer d. Etiologic agent

Find the weight of a pine tree that has a circumference of 14 inches and a height of 120 feet. Use the equation: W = b0 + b1(D2H)

Answers

Answer:

The answer is below

Explanation:

The weight of trees is calculated using the equation:

[tex]W=b_o+b_1(D^2H)[/tex]

W is the tree weight in tons, D is the diameter of the tree in inches, H is the height of the tree in feet and [tex]b_o \ and\ b_1[/tex] are constants.

The circumference is given by:

Circumference = 2πr

Where r is the radius and 2r is the diameter

Therefore:

14 = 2(22/7)× r

14 = (22/7)×2r

2r= 14 × 7 / 22

Diameter = 2r = 4.455 inches

[tex]W=b_o+b_1(4.45^2*120)\\W = b_o+2381.643b_1\\Let\ us\ assume\ b_o = -35,b_1=1.9.\\Therefore\\W = -35+2381.643(1.9)\\W=4490 \ tons[/tex]

Smooth endoplasmic Reticulum has ribosomes attached to its surface. correct and rewrite the following.

Answers

Answer:

See below

Explanation:

The correct statements can be two of the following:

1) Rough Endoplasmic reticulum has ribosomes attached to it.

2) Smooth endoplasmic reticulum do not have ribosomes attached to it.

Exceptions to the Central Dogma of Molecular Biology"" What is biggest revolution? Violation of Central dogma--- How &Why?

Answers

Answer:

reverse transcription  

Explanation:

The central dogma of molecular biology states that the flow of the genetic information is unidirectional: DNA to RNA to protein. Thus, the central dogma indicates that a gene is always transcribed into a messenger RNA (mRNA) molecule, and then this mRNA is used as a template for protein synthesis during translation. Reverse transcription is an event that contradicts the central dogma since in this case there are enzymes known as reverse transcriptases that are capable of synthesizing DNA by using RNA as template. In eukaryotic cells, reverse transcription may occur naturally during the insertion of certain Transposable Elements (retrotransposons).

who discovered micro organisms​

Answers

Answer:

It was ROBERT HOOKE who discovered micro organisms and it was discovered in the period 1665-83 two fellows of the royal society.

Explanation:

In 1665 Hooke presented the first published depiction of micro organism.

Hope all these facts help.

is the world safe place for animals and plants?




Guys pls answer it ​

Answers

Answer:

No it isn't

Explanation:

Nothing is ever safe everything is constantly trying to kill you and the same goes for animals. Wether it be humans or other animals and even their own bodies.

Answer:

Wildlife sanctuary is the place where wild animals are protected in their natural habitat. Here poaching or capturing the animals is prohibited. Biosphere reserves are the area used to conserve biodiversity like plants, animals and microorganisms. It contains many wildlife sanctuaries and national parks.

Explanation:

An ecologist samples the abundance of various species along an environmental gradient and fails to find clusters of species. Instead, peaks of abundance of dominant species are merely randomly spaced segments along a continuum. This distribution of species supports the

Answers

Answer:

This distribution of species supports Gleason´s Individualistic concept of a community.

Explanation:

This theory was proposed by Gleason and it states that plant species respond individually to environmental factors that continuously change at spatial and temporal levels. This means that the combination and distribution of plants in a certain point or area are unique because each vegetable species has a different distribution pattern and a different tolerance and abundance rate. Hence each species´ response curve to a certain gradient has its own shape and size and it different from other species curves.  

Plants assembly growing in an area is the result of environmental conditions and migration rate of species. As every area is continuously getting propagules of different species, the survival success of each plant depends not only in environmental factors, but also depends on the tolerance to other new species and their interactions. This combination along a gradient always results in different composition and abundance of species. This is why a sample can not be confined to a clearly defined vegetable community.

This point of view is known as individualistic or continuum concept of vegetable community. Gleason believed that vegetable species were distributed as a continuum and that communities can not be identified as combinations of associated species that repeat in space.

Which of the following group behaviors is primarily offensive, rather than defensive?

Answers

Answer:

Abusive behaviour, Discrimination or harassment are offensive.

Explanation:

Abusive behaviour, Discrimination or harassment are the behaviour which is offensive not defensive because in these behaviour people show aggression towards other people which is offensive in nature. These behaviour should be avoided because these behaviours hurt people and disturbance occurs in the society. These types of behaviour shows true color of the individual and the family he belong.

how are phenotypes impacted by mutations

Answers

Answer:

I guess phenotypes are not affected by mutations since mutations affect the gene structure of organisms while phenotypic characteristics are acquired through ones life time therefore no relationship between the two

Name four breeds of cattle

Answers

Answer:

Black Angus, Red Angus, Holstein, Gelbvieh

Hope this helps!

Which is represented by the image?

Answers

Answer:

represent by image.

Explanation:

To store an image on a computer, the image is broken down into tiny elements called pixels. A pixel (short for picture element) represents one colour. ... In order for the computer to store the image, each pixel is represented by a binary value. We call this representation of colours a “bit-plane”.

What happens when the positive transcription factor affinity is slightly lower than the negative transcription factors affinity? A. mRNA is made in large quantities in infrequent batches B. mRNA is made in small quantities in frequent batches. C. mRNA is made in large quantities in frequent batches D. mRNA is made in small quantities in infrequent batches.

Answers

Answer:

a

Explanation:

a

Answer: a!!

Explanation: this is correct!

Which of the following is found in the 'rungs' of a DNA strand?
A. Uracil
B. Thymine
C. Deoxy Ribose
D. Phosphate

Answers

Answer:

Thymine

Explanation:

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Certain closing costs will be prorated to account for the period of time during which the seller occupied the house. If a transaction is scheduled to close on September 21 (236 days into a 365-day year), calculate the amount that the buyer will be credited if the particular closing cost in question is estimated to be $1,569 for the entire year A jetboat is drifting with a speed of 5.0\,\dfrac{\text m}{\text s}5.0 s m 5, point, 0, start fraction, start text, m, end text, divided by, start text, s, end text, end fraction to the right when the driver turns on the motor. The boat speeds up for 6.0\,\text s6.0s6, point, 0, start text, s, end text with an acceleration of 4.0\,\dfrac{\text m}{\text s^2}4.0 s 2 m 4, point, 0, start fraction, start text, m, end text, divided by, start text, s, end text, squared, end fraction leftward. 1. Why is it not possible to resolve the compound CH3-NH-CH2-CH3 into a pair of enantiomers? 2. 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If atoms from two different elements react to form a compound, the element with a highernumberwill have a negative oxidationA. atomic radiusB. energyC. electronegativityD. atomic number Apoptosis differs from necrosis in that necrosis:_______ a. requires the reception of an extracellular signal. b. causes DNA to fragment. c. causes cells to swell and burst, whereas apoptotic cells shrink and condense.d. involves a caspase cascade Read the excerpt from The Code Book. A theoretical breakthrough would be a fundamentally new way of finding Alice's private key. Alice's private key consists of p and q, and these are found by factoring the public key, N. The standard approach is to check each prime number one at a time to see if it divides into N, but we know that this takes an unreasonable amount of time. Which statement is best supported by this excerpt Given that H2(g)+F2(g)2HF(g)Hrxn=546.6 kJ 2H2(g)+O2(g)2H2O(l)Hrxn=571.6 kJ calculate the value of Hrxn for If m(x) =x+5/x-1 and n(x) = x - 3, which function has the same domain as (mn)(x)? Joe must pay liabilities of 1,000 due 6 months from now and another 1,000 due one year from now. There are two available investments: \,1. Bond I: a 6-month bond with face amount of 1,000, a 8% nominal annual coupon rate convertible semiannually, and a 6% nominal annual yield rate convertible semiannually; and \,2. Bond II: a one year bond with face amount of 1,000, a 5% nominal annual coupon rate convertible semiannually, and a 7% nominal annual yield rate convertible semiannually Calculate the amount of each bond Joe should purchase in order to exactly match the liabilities. Which is an example of a time-bound goal?Complete something in 90 days.Do something at noon every day.Take only five minutes to complete a goal.Give yourself more than enough time to complete a goal. In recent years, the United States has Group of answer choices had a large goods trade surplus with the rest of the world. exported more services abroad than it has imported. maintained an overall trade surplus (goods and services combined) with the rest of the world. had a small goods trade surplus with Japan A number is more than half of another number by 4. The difference of these two numbers is 2. Find these numbers.