Biology High School

what is a gene?
A) a section of a protein that codes for DNA
B) the alternate version of a trait
C) the visible trait in the F1 generation
D) a section of DNA that codes for a specific trait

Answers

Answer 1

A gene is a section of DNA that encodes instructions for creating a specific protein or RNA molecule, effectively determining a particular trait in an organism.

A gene is a locus (or region) of DNA that encodes a functional RNA or protein product, and is considered the molecular unit of heredity. The transmission of genes to an organism's offspring is the basis of the inheritance of phenotypic traits. In simpler terms, genes carry instructions for making all the proteins that are required for an organism's growth, development, and biological functions, thus determining specific traits.

A gene is a discrete sequence of DNA nucleotides. Often, one gene is responsible for making one protein, but this is not always the case. The expression of genes can be influenced by environmental factors, and some proteins may be the result of multiple genes working together.

An example of how a gene works is seen in pea plants, where a specific gene might code for flower color. Therefore, to answer the student's original question, the correct option is:

D) a section of DNA that codes for a specific trait

Related Questions

Why do the symptoms of certain viral infections occur after having disappeared for a period of time?

Answers

Cause when viruses disperse there gone to evolve then come back once they evolved to try to make things sick yet again.

Answer:

When viruses disperse they leave to incubate and evolve, and then come back once they have evolved to try to make you very sick again.

Explanation:

A patient is 32 years old and complains of chest pain, a burning sensation in the chest, increased salivation, and difficulty swallowing. he has difficulty breathing and feels as if there is a "lump in his throat". what conditions does he have? describe this condition in the context of the lecture and textbook.

Answers

With the salient features of this patient comprising of heartburn, difficulty swallowing, and globus sensation (feeling of lump in throat); everything points out to the impression of gastroesophageal reflux disease or GERD. GERD is the backflow of highly acidic stomach acid to the esophagus. The epithelium of the esophagus is not adapted to these highly acidic environments therefore causing damage to the epithelium which is responsible for the symptoms. 

Chronic GERD is a risk factor for columnar metaplasia of the esophageal epithelium or Barrett's esophagus; and developing Barrett's esophagus is a risk factor for developing esophageal adenocarcinoma.

Antibodies that act against a particular foreign substance are released by ________. antibodies that act against a particular foreign substance are released by ________. medullary cords plasma cells t lymphocytes lymph nodes

Answers

The correct answer is "plasma cells". 

Plasma cells are differentiated or mature B cells capable of producing antibodies against a particular foreign substance. B cells are stimulated to differentiate into plasma cells when it binds to two receptors of helper T cell; having the T cells "help" the B cells to differentiate to plasma cells. These T cells have the antigenic information passed to them by antigen presenting cells such as dendritic cells and these will be passed to the B cells and plasma cells will produce antibodies against this specific antigen.

An organism that contains foreign dna, which was inserted into its own genetic material, is called

Answers

An organism that contains foreign DNA, which was inserted into its own genetic material, is called transgenic. 

Which of these are by-products of cellular respiration? which of these are by-products of cellular respiration? glucose, carbon dioxide, and water atp and carbon dioxide heat, carbon dioxide, and water atp, carbon dioxide, and water carbon dioxide and water?

Answers

Final answer:

Cellular respiration's by-products are carbon dioxide and water, produced as the process converts biochemical energy from nutrients into ATP and releases wastes. The process contributes to a broader biological cycle alongside photosynthesis.

Explanation:

The by-products of cellular respiration are carbon dioxide and water. During cellular respiration, glucose molecules are oxidized through a series of reactions called glycolysis, the Krebs cycle, and oxidative phosphorylation, resulting in the production of energy in the form of ATP. The CO₂ and water are produced during this process as by-products that, while considered wastes in a standalone context, continue to be essential in the closing of the biological cycle.

These processes of photosynthesis and cellular respiration constitute a cyclical harmony, where one's by-products serve as valuable reactants for the other, demonstrating an intricate balance that permits life-sustaining energy to be accessed by organisms. The primary function of cellular respiration is to convert biochemical energy from nutrients into ATP and then release waste products. Therefore, two of the options listed: 'Heat, carbon dioxide, and water' and 'ATP, carbon dioxide, and water' can be considered correct answers.

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The by-products of cellular respiration are carbon dioxide, water, and ATP. Energy from glucose is transferred to ATP, and heat is also released during the process which takes place in the mitochondria.

The by-products of cellular respiration are carbon dioxide and water. During this biological process, glucose and oxygen are used as reactants to release energy. This energy is primarily used to synthesize ATP (adenosine triphosphate), which cells use for various functions. A molecule of glucose can be converted into 36 or 38 molecules of ATP. Moreover, the process also generates heat, but unlike combustion, no light is produced. Instead, some of the energy is captured in the chemical bonds of ATP. The complete oxidation of carbohydrates occurs in the mitochondria, with the primary inputs being glucose and oxygen. It's important to understand that while cellular respiration starts with glucose, several other molecules can be metabolized to enter the pathways of respiration in different stages.

What economic method is often used to guide policy makers in making pollution regulations?

A) determining point of diminishing returns
B) supply-demand analysis
C) cost-benefit analysis

Answers

Hello,

Here is your answer:

The proper answer to this question is option A "determining point of diminishing returns"! That because the government uses that to get taxes back!

Your answer is A!

If you need any ore help feel free to ask me!

Hope this helps!

Answer:

Option A, determining point of diminishing returns

Explanation:

According to the law of diminishing returns, when in any business the profit increases marginally while the cost of input increases at a fast rate then a business is said as "not an effective business"

In case of regulations regarding pollution, it is very essential for the economist to determine whether the cost incurred in order to take measures to reduce pollution in any business is much higher than the profit gained, then such business are not profitable and hence specific measures should be taken to curb these issue through policy regulation.

Hence, option A is correct.

________ are multiple arteries that fuse in order to serve a single capillary network.

Answers

There are choices for this question namely:

convergents
connexons
portals
collaterals
arteriole beds

The correct answer is "collaterals". Collaterals are side branches of blood vessels (in this question, side branches of arteries) wherein it supplies the same capillary bed. Collaterals are mostly found pathologically in areas of ischemia and it functions to bypass the narrowed or part of the main artery.

Why shouldn't you use your thumb when taking a pulse apex?

Answers

Hi!

The reason you do not want to use your thumb to take a pulse is that you feel your own heartbeat through your thumb rather than the heartbeat of the person you are trying to get a pulse from.

Answer: Thumb has its own pulse.

Explanation:

Pulse rate is the rate at which the heart beats. As the heart pumps blood through the body and the pulse can be felt using the blood vessels that is very close to the skin.

The resting pulse of an adult is between 60 to 100 beats a minute. Pulse is generally observed in the wrist by using two fingers. Thumb cannot be used for checking pulse because it has its own pulse and there are chances a person checking pulse might observe his or her pulse inspite of the person whose pulse is to be checked.

The process by which receptor cells detect stimuli is called:

Answers

Final answer:

Receptor cells detect stimuli through a process called reception, which involves the activation of sensory receptors by stimuli. Following this, transduction converts the stimulus into a nerve impulse for the brain to process.

Explanation:

The process by which receptor cells detect stimuli is called reception. This is the initial step in the sensory perception process, which involves the activation of sensory receptors by various stimuli like mechanical stimuli (such as being bent or squished), chemicals, or temperature. These stimuli are detected within a receptor's receptive field, which can vary greatly across the different senses, such as touch, hearing, and vision. After reception, transduction occurs, which is the conversion of a stimulus into a nerve impulse that can be processed by the central nervous system.

Different types of sensory receptors are specialized to respond to specific stimuli present in the environment, and this response results in a change in the receptor cell's membrane potential. There are two main types of sensory transduction systems; one involves a neuron working with a sensory receptor cell or process, and the other involves a sensory nerve ending directly responding to stimuli. Sensory receptors can experience physical, chemical, or electromagnetic variations which they convert into membrane potential changes, known as transduction.

what is a pathogen that shows no life sign outside another cell?

Answers

I believe that a pathogen that shows no life sign outside another cell is called rickettsia. Rickettsia is a micro-organism pathogen that occupies the position between viruses and bacteria. It is a parasite that is mostly found in ticks, fleas and even mammals. This pathogen causes an infection in the blood.

Why is the federal income tax a progressive tax?
@whpalmer4 @thomaster @iambatman @linda3 @DollyAcquah @Ashleyisakitty @kewlgeek555
Please help ?

Answers

A progressive tax means that as you earn more, you get taxed at a higher rate. The alternative is a regressive tax, which means you get taxed more if you have less. There are different brackets of income for a federal tax calculation. People who made $1,000,000 pay more taxes as a percentage of their income than people who made only $50,000, for exaple.

Proteins are made where in the cell?

Answers

Ribosomes make protein within cells.

Ribosomes are mainly found bound to the endoplasmic reticulum. They are also scattered throughout the cytoplasm, depending upon whether the cell is plant, animal, or bacteria. Ribosomes serve as the protein production center for the cell and are consequently most abundant in cells that are active in protein synthesis, such as pancreas and brain cells.

Hope this helps! :)

Answer:

They made in ribosomes bruh

Explanation:

In this mechanism enzyme dicer cuts DSRNA into smaller fragments called SIRNA which form a complex with RISC in degrees specific
A) proteins
B)mRNA
C)DNA

Answers

I believe the correct answer is mRNA.  Dicer is a part of RNase III which leaves double stranded RNA and pre-microRNA into short double stranded RNA fragments called small interfering RNA and microRNA respectively. The Dicer facilitates the activation of RNA induced silencing complex (RISC), which are essential for RNA interference. The RISC has a catalytic component argonate, which is an endonuclease capable of degrading mRNA. siRNAs are specfic to the mRNA sequence unlike miRNAs which are not completely complementary to the mRNA sequence.

Which cell types remain in a non-dividing stage and do not complete the mitosis process?

Answers

Answer;

Muscle cells and nerve cells

Explanation;Mitosis is a type of cell division which occurs in the somatic cells or the body cells where cells divides to generate daughter cells that are identical to the parent cells.All the body cells undergo mitosis a process that enhances growth, however, the muscle cells and the nerve cells are specialized cells that remain in a non-dividing stage and do not complete the process of mitosis. Nerve cells for example they can never be created again once they die.These cells, nerve cells and muscle cells lack repair mechanisms for injuries. Since they are specialized cells they loose the ability to divide by mitosis.

Which of these statements is not correct regarding our limbic system? which of these statements is not correct regarding our limbic system? emotional states can alter our blood pressure. sights often create strong emotional responses. the cingulate helps you express your emotional state. your amygdala judges facial expressions for danger?

Answers

I believe the answer is Sights often create strong emotional responses. This is not true since the sense of smell is more directly attached to the limbic system and is therefore more likely to cause emotional response. The limbic system is a set of brain structures located on both sides of the thalamus, beneath the cerebrum. it supports functions such as emotion. behavior, motivation, long term memory and olfaction.

..... responsible for 50% of the earth photosynthesis which produces a significant amount of oxygen

Answers

Oxygen is essential to enabling many of the Earth’s life forms to survive -- without access to oxygen, humans can’t live for more than a few minutes. The air that enters human lungs contains about 21 percent oxygen. The process responsible for producing most of the Earth’s oxygen is known as photosynthesis. In this process, plants and certain other organisms convert sunlight into oxygen and other products.

Large populations of tortoises inhabited the Galápagos Islands before humans. When humans settled on the islands and introduced goats, the number of tortoise declined. What is MOST likely the explanation for the decrease in the tortoise population?A. Goats consume tortoise hatchlings.
B. Goats pollute water sources.
C. Goats compete with tortoises for vegetation.
D. Goats contribute to soil erosion.

Answers

i think the answer is c 
hope it helps 
please mark as brainliest

Answer: Option C

Explanation:

Galapagos island had large population of tortoise there before humans intervented there. Due to human beings, goats also came there.

Then Goats started to take over the place by competing for the resources.Tortoise and goats feed on the same type of vegetation. So the introduction of Goats in the area where tortoise are already present will hamper the population of tortoise.

Hence, the correct answer is option C

What animals will share the most genes?
animals in the same class
animals in the same family
animals in the same order
animals in the same phylum

Answers

Animals in the same family

Answer:

Animals in the same family

Explanation:

Kingdom - Phylum -Class - Order - Family - Genus - Species

A nurse is caring for a client with varicose veins. which clinical manifestations should the nurse expect with this diagnosis?

Answers

The clinical manifestations should the nurse expect are reports of leg fatigue, tortuous veins in the legs and pain in lower extremities when standing.

In addition, leg fatigue is a communal clinical manifestation triggered by venous stasis and insufficient tissue oxygenation. The vein walls deteriorate and dilate causing distended, bulging veins that look tortuous and darkened. As vein walls weaken and dilate venous pressure increases and the valves turn out to be useless in which vein stasis and inadequate oxygenation end result is limb discomfort. The discolored toenails effect from a fungus below the nail or chronic hypoxia, not varicose veins, confined to a small area of heat in a calf is a mark of thrombophlebitis and reddened zones on a leg are symptomatic of thrombophlebitis.

Which molecule will cross a cell membrane most easily? select one:
a. a large molecule such as hemoglobin
b. a small molecule such as glucose
c. genetic material such as dna
d. a highly polar molecule such as water
e. a lipid-soluble substance such as testosterone?

Answers

c because you have to have genetic material .

"which best describes the state of health insurance in texas"

Answers

Texas has the highest proportion of uninsured residents of any of the 50 states

Permanent inflammation of the airways accompanied by excess mucus production is called

Answers

The correct answer is bronchiectasis. 

Bronchiectasis an irreversible lung disease is characterized by the permanent dilatation and inflammation of the airways accompanied by excessive mucopurulent secretion. Bronchiectasis is often caused by repeated acute lung infections that did not resolve fully. Symptoms of this condition include chronic cough, dyspnea, and hemoptysis.
The answer is bronchiectasis. 

Bronchiectasis is a condition in which damage to the airways causes them to widen and become flabby and scarred. The airways are tubes that carry air in and out of your lungs.

The upper temperature limit at which cells can function is determined by the _______ point of _______.

Answers

The correct answer is that the upper temperature limit at which cells can function is determined by the denaturation point of proteins. Proteins, one of the molecular building blocks of life (along with carbohydrates, fats, and nucleic acids) are the ones responsible in performing various cellular functions. These proteins are polypeptides folded properly to perform specific functions. In the event of high temperatures, these proteins unfold and lose their function thereby having the whole cell lose its function. 
The upper temperature limit at which cells can function is determined by the denaturation point of proteins. Proteins work at specific or optimum temperatures, these including enzymes that catalyze most reactions in the body, without which high temperatures denatures them distorting their secondary and tertiary structures, while low temperatures below the optimum temperatures deactivates the proteins. Therefore, at high temperatures and low temperatures, cells may not be in a position to carry out their activitities as many enzymes or proteins are either denatured or inactive.

While eating a celery stalk and you are picking stringy parts of the plant out of your teeth, you realize that the stringy parts provide support but are flexible. the stringy parts of the celery you eat are composed of what type of cells?

Answers

Cells in the collenchyma. 
Final answer:

The flexible and supportive stringy parts of a celery stalk are made up of collenchyma cells. These cells, alive at maturity and often found beneath the plant's epidermis, provide structural support. Despite being indigestible for humans, consuming this cellulose is beneficial as dietary fiber.

Explanation:

The stringy parts of the celery that you eat, known for their flexibility and support, are composed of a type of plant cells called collenchyma cells. These cells are elongated with unevenly thickened walls, providing structural support, especially to the stem and leaves. They are usually alive at maturity, and typically found beneath the epidermis (the outer layer) of the plant.

An important fact to note is that though we ingest these cells while eating celery, human beings can't digest cellulose, the primary substance in plant cell walls. The indigestible portion is referred to as dietary fiber, providing health benefits such as promoting a healthy digestive tract and possibly reducing the risk of heart disease and certain types of cancer.

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Scientists consider the testing phase of the cell cycle because they can’t see a visible change during this phase

Answers

Scientists consider the INTERPHASE the resting phase of the cell cycle because they can not see a visible change during this phase.
The interphase refers to the interval in the cell cycle between two cell divisions. During this stage, the individual chromosomes in the cell can not be distinguished. Although scientist can not see any outward visible change during this phase, but it is actually the time when the DNA inside the nucleus is replicated.

An educated guess or rational explanation about a specific phenomenon

Answers

Hypothesis: An educated guess or rational explanation about a specific phenomenon

Which of the following is not a way in which human events can change the Earth’s surface?
a.
draining wetlands
b.
agriculture
c.
glacial melting
d.
pesticide use

Answers

Answer c Glacial melting is not an event caused by the human activities. All the other events like draining wetlands, agriculture, pesticide use are caused by human activities. Glacial melting occurs when the glaciers situated at high latitudes melt due to warming which leads to rise in sea level and eventually inundation of the low lying coastal areas
D.pesticide use because nuts are nuts

Asexual reproduction
Sexual reproduction
Mitosis
Meiosis
Chromosome
Cell division
Clone
Budding
Acquired trait
Recessive Trait
Dominant Trait
Co-Dominant
what is the definitions for these plz

Answers

i) Asexual reproduction is a type of reproduction that involves an individual reproducing without involvement with another individual of that species. e.g. in bacteria a cell divides in to two daughter cells through a process called binary fission. They include; budding, binary fission, vegetative propagation and spore formation among others.

ii) Sexual reproduction : is a type of reproduction that occurs by combining genetic information from two individuals of different types. This mainly occurs in organisms, one sex (male) produces a small percentage of motile which travels with a larger stationary gamete produced by the female (ovum).

iii) Mitosis is a process of cell division that involves a parent cell or original cell diving to give two daughter cells with equal number of chromosomes. The process takes place in the somatic cell (body cells) where a diploid (2n) parent cell yields two diploid daughter cells.

(iv) Meiosis is the type of cell division which involves diving a cell division where a parent cell (diploid 2n)  divides into four daughter cells which are haploid, n. The daughter cells contain half the number of chromosomes as the parents. This process occurs in the gametes cell. The process is important as it ensures that there is genetic variation and hybrid vigor among the off springs.

v) Chromosomes; is a DNA molecule with part or all of the genetic material (genome) of an organism. Most eukaryotic chromosomes include packaging proteins which, aided by histone proteins, bind to and condense the DNA molecule to prevent it from becoming and unmanageable tangle.

vi) Cell division; Cell division is a process which involves a cell gives rise to other cells. when cells divide they make new cells. A single cell divides to make two cells and these two cells then divide to make four cells and the process continue. The process is called cell division or cell reproduction since new cells are formed when old cells divide. There two major types of cell division namely mitosis and meiosis.

vii) Clone; cloning is the process of producing similar populations of genetically identical individuals that occurs in nature when organisms such as bacteria, insects, plants or animals reproduce asexually. Thus, a clone is an identical genetic copy of either DNA, a cell, or a whole organism.

viii) Budding; Budding is a type of asexual reproduction in which a new organism develops from an outgrowth or bud due to cell division at one particular site. The new organism remains attached as it grows, separating from the parent organism only when it is mature, leaving behind scar tissue. A good example is budding in yeast.

ix)Acquired trait; this is a characteristic or a trait that produces a phenotype that is a result of an environmental influence. Acquired traits are not coded for in the DNA of an individual and therefore cannot be passed down to offspring during reproduction. They include things such as calluses on fingers, larger muscle size from exercise or from avoiding predators.

x) Recessive trait; Recessive traits are traits which can be carried in a person's genes without appearing in an individual. It is masked by a dominant gene. For example, a dark-haired person may have one gene for dark hair, which is a dominant trait and one gene for light hair, which is recessive.

xi) Dominant trait; When a trait is dominant, only one allele is required for the trait to be observed. A dominant allele will mask a recessive allele, if present. A dominant allele is denoted by a capital letter. example in humans is the dark hair, such that if one parent contributes a gene for dark hair and the other contributes a gene for light hair, the child will have dark hair.

xii) Co-Dominant, Co-dominance is a form of dominance where the alleles of a gene pair in a heterozygote are fully expressed. This results in offspring with a phenotype that is neither dominant nor recessive. A typical example is the ABO blood group system, where a person with blood group AB (heterozygous), both A allele and B allele are equally expressed.


Tiny openings in the epidermis of the leaf that allow air to enter the leaf are called ______.

Answers

Tiny openings in the leaf's epidermis that allow for gas exchange are called stomata. They play a significant role in photosynthesis by letting carbon dioxide in and allowing oxygen and water vapor to exit. Guard cells control their opening and closing in response to environmental conditions.

Tiny openings in the epidermis of the leaf that allow air to enter the leaf are called stomata (singular stoma). These are gaps in the epidermis that enable gas exchange between the atmosphere and the internal parts of the leaf. The epidermis protects the inner leaf tissues and helps regulate gas exchange by possessing these small openings. Stomata are crucial for photosynthesis as they allow carbon dioxide (CO₂), which is needed for the process, to enter the leaf. Simultaneously, oxygen, a product of photosynthesis, and water vapor from transpiration exit through the stomata. The opening and closing of these stomata are controlled by specialized epidermal cells known as guard cells. These guard cells respond to various environmental stimuli such as light, humidity, and the concentration of CO₂ in the air, regulating the opening and closing of the stomata accordingly.

What is a repeated pattern of losing and regaining body weight called?

Answers

The answer is weight cycling. This is also called yoyo dieting which also resembles the upward and downward movement of yoyo. In this situation, the person who wants to diet is initially successful in his/her pursuit of weight loss but unsuccessful in maintaining the loss in long term. This result in going back to original weight or more. The person will try to loss again the weight that was gained and the cycle will start all over again. There are various causes for this condition such as depression, fatigue. There were no evidence of its adverse effect to health however, this can alter the basic metabolism of our body.
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