Answer:
Earthquakes, landslides, volcanic eruptions and natural bush fires all affect the many different ecosystems on our planet. Initially, these disasters negatively affect the biodiversity of wetlands, forests and coastal systems by causing the spread of invasive species, mass species mortality and loss of habitat.
explain why antibiotics are not consistently effective against infection of bacteria
Explanation:
Antibiotic resistance happens when germs like bacteria and fungi develop the ability to defeat the drugs designed to kill them. That means the germs are not killed and continue to grow. Infections caused by antibiotic-resistant germs are difficult, and sometimes impossible, to treat.
hope this helps you.
How many chromatids does a human somatic cell contain at the end of G2 phase just prior to mitosis?
Which of the following statements best goes with the Law of Conservation of Energy
Explanation:
Just choose the one that is similar to that of this : Energy is neither created nor destroyed in a given system.
note -it is always unidirectional i.e - Goes in only one path.
what company should the school district choose?
Answer:
The answer is E you're on the right track :)
Explanation:
your second best choice would be B by the way *
[tex]\huge\underline\mathtt\colorbox{cyan}{North Company}[/tex]
Explanation:
Because it does not use oil or natural gas( which are non-renewable) Also it uses renewable resources (like solar or wind power)Evolution is a change in
a. a living thing as it grows older
b. a species over time
c. characteristics of living things
d. the history of the Earth
2 Answer:
Homologous body parts are similar in
a. function
b. structure
c. both a and b
la respiration cellulaire aérobie, l'oxygène gazeux est combiné avec
des molécules alimentaires où
Answer:
La respiration cellulaire est l'ensemble des processus du métabolisme cellulaire convertissant l'énergie chimique contenue dans le glucose en adénosine triphosphate (ATP). Ces processus impliquent une succession de réactions chimiques formant des voies métaboliques qui appartiennent au catabolisme, c'est-à-dire qu'elles consistent à cliver les grosses molécules biologiques en molécules plus petites, ce qui libère de l'énergie ainsi qu'un certain nombre de déchets. Ces réactions sont globalement exothermiques, c'est-à-dire qu'elles produisent de la chaleur, la plupart étant des réactions d'oxydoréduction. De ce point de vue, la respiration s'apparente chimiquement à une combustion des nutriments, jouant le rôle de donneurs d'électrons (réducteur), en présence d'un accepteur d'électrons (oxydant).
La respiration est l'une des voies essentielles permettant aux cellules de produire de l'énergie métabolique pour leur développement et leur activité. Parmi les nutriments utilisés par les cellules des animaux et des plantes, on compte les glucides (ose), les peptides (acides aminés) et les lipides (acides gras), tandis que l'oxydant le plus fréquent dans les systèmes biologiques est l'oxygène moléculaire O2. L'énergie biochimique récupérée sous forme d'ATP peut ensuite être utilisée par des processus qui consomment de l'énergie tels que les biosynthèses, la locomotion ou encore le transport actif de substances chimiques à travers les membranes biologiques. La respiration aérobie requiert du dioxygène O2 pour produire de l'ATP. C'est la voie prépondérante de dégradation du pyruvate, issu de la glycolyse. Celle-ci se déroule dans le cytosol, mais le pyruvate doit pénétrer dans les mitochondries pour y être entièrement oxydé par le cycle de Krebs, lequel se déroule dans la matrice mitochondriale. Le cycle de Krebs convertit le pyruvate en dioxyde de carbone CO2 et en coenzymes réduites (NADH et FADH2), coenzymes dont les électrons à haut potentiel de transfert contiennent l'essentiel de l'énergie chimique des molécules dégradées. Ces coenzymes réduites sont alors oxydées par la chaîne respiratoire dans la membrane mitochondriale interne. L'énergie des électrons à haut potentiel de transfert permet de pomper des protons hors de la matrice mitochondriale vers l'espace intermembranaire. Il s'établit un gradient de concentration de protons à travers la membrane interne, lequel génère un gradient électrochimique suffisant pour actionner l'ATP synthase, une enzyme capable de phosphoryler l'ADP en ATP grâce à l'énergie emmagasinée dans ce gradient électrochimique. On appelle phosphorylation oxydative l'ensemble formé par la chaîne respiratoire et l'ATP synthase couplés par gradient électrochimique.
Les manuels de biologie indiquent généralement que chaque molécule de glucose entièrement oxydée par la respiration cellulaire est susceptible de produire 38 molécules d'ATP : 2 ATP issus de la glycolyse, 2 ATP issus du cycle de Krebs, et 34 ATP issus de la chaîne respiratoire. Ce rendement nominal n'est cependant jamais atteint en raison des pertes par dissipation du gradient électrochimique à travers la membrane interne des mitochondries ainsi qu'en raison du coût énergétique du transport actif du pyruvate depuis le cytosol jusqu'à la matrice mitochondriale, de sorte que les estimations actuelles s'établissent autour de 30 à 32 molécules d'ATP formées par molécules de glucose oxydée1.
La respiration aérobie est jusqu'à 15 fois plus efficace que la respiration anaérobie, qui produit seulement 2 ATP par molécule de glucose oxydée. Cependant, certains organismes anaérobie, comme les archées méthanogène, sont capables d'accroître ce rendement en utilisant d'autres accepteurs d'électrons finaux que l'oxygène.
Glycolyse
La glycolyse est une voie métabolique qui se déroule dans le cytosol des cellules de pratiquement tous les êtres vivants. Elle peut fonctionner de manière aérobie ou anaérobie, c'est-à-dire respectivement en présence ou en l'absence d'oxygène. Chez l'homme, elle conduit au pyruvate en conditions aérobies et au lactate en conditions anaérobies.
En conditions aérobies, ce processus convertit une molécule de glucose en deux molécules de pyruvate, avec production concomitante de deux molécules d'ATP. Plus précisément, il commence par consommer deux molécules d'ATP pour accroître la réactivité du glucose en vue de son clivage par l'aldolase puis en produit quatre par phosphorylation au niveau du substrat, avec production de deux molécules de NADH. La réaction globale de la glycolyse peut s'écrire :
glucose + 2 NAD+ + 2 Pi + 2 ADP → 2 pyruvate + 2 NADH + 2 ATP + 2 H+ + 2 H2O + chaleur.
Explanation:más inteligente por favor
Which statement contains inaccurate information about stem cells?
Stem cells are undifferentiated.
Stem cells are specialized.
Stem cells can make more cells of the same type through cell division (potentially indefinitely).
Answer:
The incorrect statement is stem cells are specialized.
Explanation:
By their nature stems cells are unspecialized because they are undifferentiated. This means that they have not yet been assigned a specific role in the body.
The change that occurred in peppered moths is an example of
a. overproduction
b. natural selection
c. migration
d. isolation
Studying DNA to find evolutionary similarities among organisms is a
type of _____ evidence.
Answer:
Biogeography
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the answer is A. voting.
What are the unique properties of carbon
carbon have high catination property means self linking property
Why shoud temperature and oxygen be measured in a fish salinity tolerance experiment?
First, the solubility of oxygen decreases as temperature increases ¹. This means that warmer surface water requires less dissolved oxygen to reach 100% air saturation than does deeper, cooler water.
There are no ____________ in the ____________ , located where the nerve fibers of the ____________ leave the eye and enter the ____________ . Consequently, this region of the retina is commonly called the ____________
There are no PHOTORECEPTORS in the OPTIC DISC located where the nerve fibers of the RETINA leave the eye and enter the OPTIC NERVE. This region is commonly called the BLIND SPOT.
The retina is an important layer of nervous tissue that covers the inside of the eye, in which the sensation of vision initiates.
Photoreceptors are specialized cells within the retina that respond to light stimuli. In the retina, there are two types of photoreceptor cells: cones and rods.
The blind spot is a small portion of the visual field of the eye that localizes in the optic disk within the retina.
There are no rods or cones (i.e. photoreceptor cells) within the optic disk.
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Which geological feature(s) are/is formed by the deposition of sandy, sediments?
Group of answer choices
a cliff
a canyon
sand dune
delta
Both plant and animal cells need to produce energy for cellular functions. In both types of cell, this function is carried out by which organelle?
What is the relationship between photosynthesis and cellular respiration?
Answer:
Photosynthesis converts carbon dioxide and water into oxygen and glucose.
Explanation:
Glucose is used as food by the plant and oxygen is a by-product. Cellular respiration converts oxygen and glucose into water and carbon dioxide. Water and carbon dioxide are by- products and ATP is energy that is transformed from the process.
what are advance of sexual representation?
select all that apply
(a) offspring are genetically different from their parents
(B) species that reproduce sexually can reproduce on their own in isolated areas
(c) sexually reproducing species can generally reproduce quickly
(D) species that reproduce sexually have more genetic diversity
Answer:
It helps to growth population and maintains in continuity of life. And another advantage is that it helps in production of new type of organisms. It means offsprings are genetically difference than parents etc.
the movement of food through the gastrointestinal tract by the contraction of muscles is called:
A. peristalsis
B. absorption
C. churning
D. digestion
Answer:
The movement of food through the gastrointestinal tract by the contraction of muscles is called Peristalsis.
What would happen to the DNA molecule if the pairing was non-complementary, in other words, the two purines (adenine and guanine) paired with one another and likewise the two pyrimidines (thymine and cytosine) paired with each other.
If the base-pairing in DNA becomes non-complementary such that purine bases can pair with one another and pyrimidine bases can pair with one another, the 1:1 ratio of purine to pyrimidine bases in DNA will no longer hold.
Due to the complementary base-pairing rule, the ratio of purine to pyrimidine bases in DNAs is usually 1:1. This is because Adenine always pairs with Thymine while Guanine always pairs with Cytosine.
Once this base-pairing rule is removed and becomes purine-purine and pyrimidine-pyrimidine pairings, then it becomes unnecessary for the ratio of purine to pyrimidine bases to be 1:1.
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Answer: Answer: Answer: Answer:
Hair is largely made up of the protein keratin. Why can a shampoo containing protein not replace the protein in damaged hair
Given what we know about the protein composition of hair, the protein in shampoo cannot replace the protein in damaged hair due to the fact that it would not be giving the cells the raw material needed to create the protein.
In the human body, along with all other living things, proteins are created from amino acids. The genetic code is read using a strand of messenger RNA called mRNA. Then, a transfer version of this known as tRNA brings the corresponding amino acid based on the genetic code found in the message. These amino acids are then chained together to form proteins.
The protein in shampoo cannot replace the protein in damaged hair because cells do not use entire proteins as a substrate, they use amino acids to create proteins. This may seem counterintuitive, but there are very good biological mechanisms behind it. In order for a shampoo to fix damaged hair, it must contain the amino acids necessary to re-create the lost proteins.
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Can anyone help me with this science question
Answer:What the text is telling you is about scientist and
it may help you learn about scientist is in a lead work
Explanation:
Write the sentence as an equation.
p subtracted from 369 is equal to 311
G
Answer:
p-369=311g
Explanation:
In a food web, a bird eats both
berries and insects. The bird is
considered a(n)
A. producer
B. heterotroph
C. chemotroph
An individual with androgen insensitivity syndrome will:
A. Not be feminized at puberty
B. Prefer a female sexual partner
C. Not function sexually as an adult
D. Have female external genitalia
Answer:
D I think. i am not completely sure.
An individual with androgen insensitivity syndrome will have female external genitalia, which is option D, as androgen insensitivity syndrome (AIS) is a genetic condition in which an individual's cells are unable to respond to androgens.
What is androgen insensitivity syndrome?Androgen insensitivity syndrome (AIS) is a genetic disorder in which an individual's body is unable to respond properly to male sex hormones, called androgens. The condition is caused by mutations in the gene that codes for the androgen receptor, which is a protein that binds to androgens and enables them to activate certain genes. In individuals with AIS, the androgen receptor either doesn't work at all or doesn't work properly, which leads to a range of physical changes that can vary in severity depending on the degree of androgen insensitivity.
Hence, An individual with androgen insensitivity syndrome will have female external genitalia, which is option D.
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Question 1 of 10
A cell membrane is very specific about what it allows across. How does this
help the cell?
A. The cell works better when it contains fewer proteins.
B. It helps the cell absorb as many different molecules as possible.
C. Transport proteins allow only enzymes to pass through the
membrane
D. It is better for the cell if most molecules are prevented from
entering
Answer:
D. It is better for the cell if most molecules are prevented from
entering
Explanation:
How does the Earth get its brand new NITROGEN?
Answer:
Scientists show evidence that nitrogen acquired during Earth's formation came from both the inner and outer regions of the protoplanetary disk. Nitrogen is a volatile element that, like carbon, hydrogen and oxygen. Nitrogen makes up 78 per cent of the air we breathe, and it's thought that most of it was initially trapped in the chunks of primordial rubble that formed the Earth. When they smashed together, they coalesced and their nitrogen content has been seeping out along the molten cracks in the planet's crust ever since.
How does respiration impact the amount of carbon in the atmosphere?
The process of respiration produces energy for organisms by combining glucose with oxygen from the air. During cellular respiration, glucose and oxygen are changed into energy and carbon dioxide. Therefore, carbon dioxide is released into the atmosphere during the process of cellular respiration.
explain how asexual reproduction is different from sexual reproduction
Explanation:
asexual only needs one parent and serial needs 2 parents
asexaul animals reproduce via mitosis and sexual animals via mieosis
Think about what else do you know about weather and the sun? what would you like to know or learn more about?
Answer:
I Would Like To know more about the temperatures the sun makes on other planets
List three ways in which plants use water
Answer:
Water helps in the germination of seeds. (ii) Water helps in the process of photosynthesis by which plants prepare their food. (iii) water helps in the transport of nutrients and minerals from soil to the plant
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