The intraluminal pH is rapidly changed from highly acid in the stomach to about pH 6 in the duodenum. The pH gradually increases in the small intestine from pH 6 to about pH 7.4 in the terminal ileum. The pH drops to 5.7 in the caecum, but again gradually increases, reaching pH 6.7 in the rectum.
The pH of the stomach is acidic while that of small intestine is slightly alkaline.
What is pH?
This is referred to as the power of hydrogen and is the measure of the degree of acidity or alkalinity of a substance.
The stomach contains dil. Hcl which makes it acidic while the small intestine is alkaline because of the presence of bile.
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Which best summarizes the flow of energy in a producer?
O Sun > ADP > muscle cells
O Sun > mitochondria > CoH1206
O Sun > chloroplasts > mitochondria
O Sun > mitochondria > chloroplasts
The correct answer to the given question is O Sun > chloroplasts > mitochondria ie. Option (C)
Chemical reactions are how energy moves through living things. One set of substances, known as reactants, are transformed into another set, known as products, during each chemical reaction.Such reactions take place in plants as a result of the sunlight-to-chemical energy conversion process, which powers plant growth and other operations.In particular structures known as chloroplasts, this process, referred to as photosynthesis, involves the combination of carbon dioxide and simple sugars to create more complex carbohydrates. The cells of plants, algae, and some protists include these membrane-bound organelles called chloroplasts.From one atom or molecule to another, electrons move. The relevance of these oxidation-reduction (or redox) reactions in mitochondria to living systems cannot be overstated.In this manner, molecules that carry energy are created and put to use for efficient energy transfer
Hence, the correct answer is O Sun > chloroplasts > mitochondria ie. Option (C)
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Question 7 (True/False Worth 1 points)
(05.03 LC)
The correct way to calculate population density is by dividing the total population by the land area.
O True
O False
Answer: true
Explanation:
Why are stems so controversial
The stem cells are so controversial because it involves the destruction of the human embryo as well as its life for just research purposes only.
What are Stem cells?Stem cells may be defined as cells that are totipotent and pluripotent in nature and have the prospect to mature into many diverse types of cells in the body.
Embryonic stem cells are the type that is considered most unethical and controversial. The stem cell debate is the contemplation of the moralities of research involving the maturation and use of human embryos for only research methodologies.
Destruction of such important life for our own benefit or research purposes makes the podium controversial.
Therefore, it is well described above.
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Within a decade of the introduction of a new insecticide, nearly all of the descendants of the target pests were immune to the usual-sized dose. The most likely explanation for this immunity to the insecticide is that…?
Answer:
mqa-vivn-jei
Explanation:
truth and dare?
Answer - d: the pests developed physiological adaptations to the insecticide
Explanation: Pests become resistant by evolving physiological adaptations that protect them from the chemical.
What is the function of lacI in the regulation of the lac operon? It is the operator that mediates the transcription of the structural genes. It is a structural gene that encodes permease. It encodes a repressor that, in the absence of lactose, binds to the lac operator and blocks expression of the structural genes. It is the promoter that mediates the transcription of the operon. It encodes a repressor that, in the presence of lactose, binds to the lac operator and blocks expression of the structural genes.
The function of lacI in the regulation of the lac operon is that it encodes a repressor that, in the absence of lactose, binds to the lac operator and blocks the expression of the structural genes. Thus, the correct option is C.
What is Lac operon?Lac operon may be defined as an operon or a set of genes with a single promoter that encodes genes for the carrier and metabolism of lactose in E. coli and other bacterial species.
The concept of the operon was first proposed by Jacob and Monod in 1961.
The lacI gene product, the lac repressor, is expressed from a separate transcriptional unit upstream from the operator.
When lactose is absent, the lacI gene regulates and produces repressor mRNA which translates repression.
Therefore, it is well described above.
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Which factor helps determine the fertility rate of a group of people?
A. Wealth
B. Death rate
C. Farmland
D. Consumption rate
PLEASE HELP! I WOULD APPRECIATE IT!
Which of the following is true about Earth's freshwater, air, soil and trees? A. Although these resources are renewable, their present benefits can be reduced if used carelessly. B. Although these resources are renewable, they present very few benefits for humans. C. These resources are nonrenewable, so humans must stop using them if they are to survive. D. Although these resources are nonrenewable, humans don't have to worry about conserving them.
Which of the following is true about Earth's freshwater, air, soil and trees?
A. Although these resources are renewable, their present benefits can be reduced if used carelessly.
B. Although these resources are renewable, they present very few benefits for humans.
C. These resources are nonrenewable, so humans must stop using them if they are to survive.
D. Although these resources are nonrenewable, humans don't have to worry about conserving them
Which is considered a chemical mutation? tanning beds, tobacco, X-rays, or sunlight
Explanation:
chemical mutations are those chemical which change the DNA molecule in such an extent that it function and make different expressions of gene
tobacco is considered as chemical mutation
The cell membrane is said to be:
[tex]\huge\mathfrak\red{ANSWER}[/tex]
Semi-PermeableExplanation is in the pic
Hope it heps
Answer:
The cell membrane is said to be semi-permeable.Explanation:What is meant by a semi-permeable membrane?✈This is a membrane which allow only certain substances to go in or out of the cell.
The Cell membrane of living cells is said to be a semi permeable membrane.
Hope it helps!
Round seeds are dominant over wrinkled seeds in
the pea plants that Mendel studied. Provide the
genotypes and phenotypes of offspring produced
when a heterozygous round plant crosses with
another heterozygous round plant.
Genotype - RR - 25%, Rr - 50%, rr - 25% (1:2:1)
Phenotype - Round seeds - 75%, Wrinkled seeds - 25% (3:1)
How explain your answer?Let the letter "r" stand for the alleles, where R is round seeds and r is wrinkled seeds. A genotype is an individual's genes represented through alleles. Phenotypes are how the genes express themselves. In other words, genotypes will be written using letters, the alleles, and phenotypes will be the possible outcomes of the alleles.
Both of the parent seeds have the genotypes Rr and the phenotype of round seeds.
If you create punnet square (which had four boxes in total) 1 will have RR, 2 will have Rr, and 1 will have rr. These are the ratios for the genotypes. Each box represents 25%, so the percentages will be 25, 50, and 25. Finally, 3 of these boxes (RR and Rr) will result in round seeds because those are dominant. Only the genotype rr will result in wrinkled phenotype. Therefore, the ratio is 3:1 or 75% to 25%.
Thus, this could be the answer.
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why being heterozygous for sickle cell anemia in an area with high malaria rates is most beneficial when compared to homozygous dominant or recessive individuals.
help plssssssss
Answer:
Heterozygous people for sickle cell anemia are more resistant to the debilitating effects of malaria than the normal homozygous people.
Place the following in order of blood flow back to the heart.
- heart
- capillaries
- veins
- superior and inferior vena cava
What causes an ionc bond?
The amount of blood ejected with each beat of the heart is known as:
The amount of blood ejected with each beat of the heart is known as the Stroke volume
What is Stroke volume?Stroke volume is the volume of blood pumped out of the left ventricle of the heart during each systolic cardiac contraction.
It is the difference between end-diastolic and end-systolic volumes.
Thus, it is the volume ejected with each heart beat.
Hence, the amount of blood ejected with each beat of the heart is known as the Stroke volume
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What are substrates?
A. the products of chemical
reactions
B. a part of the lungs that helps with
oxygen exchange
C. the reactants (ingredients) of
enzyme-catalyzed reactions
Which of these statements is NOT true of the phylogenetic tree?
The statement that says that the phylogenetic tree ranks organisms by importance in evolutionary history is false.
A phylogenetic tree is a branching diagram which shows how an organism is linked to its ancestorsIt depicts the relationship between various organisms who may have shared a common ancestorUsing a phylogenetic tree, we can are better able to pinpoint when and how a new species has evolvedIt shows how evolution has occurredWe have to keep in mind that phylogenetic trees are not always accurate, they are a form of hypothesesA phylogenetic tree does not rank organisms by their significance in evolutionary history.
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Your question was incomplete. Please check below the full content.
Which of these statements is NOT true of the phylogenetic tree?
A.It ranks organisms by importance in evolutionary history.
B.It depicts an organism's lineage as it changes over time
C.It shows successive events of speciation in which one species gives rise to two.
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3. what is an ecosystem?
o a group of animals of all the same species in an area
a group of living and nonliving things
the process for converting energy into food
the relationship between plants and animals
Answer:
A group of animals of all the same species in an area.
Explanation:
Please help me answer this task about Plant Biotechnology
Answer:
Plant biotechnology can be defined as the use of tissue culture and genetic engineering techniques to produce genetically modified plants that exhibit new or improved desirable characteristics.
Explanation:
These crops offer several benefits both farmers and consumers.
...
Pocket K No. 2: Plant Products of Biotechnology.
Product Trait
Bean Virus disease resistance
Canola Herbicide tolerance, modified oil/fatty acid, pollination control system, phytase production
Cotton Herbicide tolerance, insect resistance, low gossypol
Eggplant Insect resistance
determine the following describe an acid,base, or neutral substance
According to the research, acids and bases are two different types of substances opposite to each other and it is neutral when it is neither acidic nor alkaline.
What is an acid, base or neutral substance?An acid is that chemical substance capable of transferring protons (H+) to another chemical substance.A base is that chemical substance capable of capturing protons (H+) from another chemical substance.A neutral substance is one that when dissolved in water dissociates into its ions.Therefore, we can conclude that according to the research, acids and bases are two different types of substances opposite to each other and it is neutral when it is neither acidic nor alkaline.
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Ozone consists of _______ molecules of oxygen, is found primarily in the ______ and protects us from ______
The blank spaces in the task content should be filled with is; Three(3), atmosphere and ultraviolet rays of the sun.
What is Ozone?Ozone is a trioxygen molecule; contained in the upper atmosphere with a sole aim of protecting biological life against ultraviolet rays of the sun. The ozone layer is however depleted to Oxygen molecule in the lower atmosphere.
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When cartilage is produced at the epiphyseal side of the metaphysis at the same rate as bone is deposited on the opposite side, bones.
Answer:
grow longer
Explanation:
In a long bone, the epiphyseal is the growing region. In young bones, bone formation occurs in a layer of hyaline cartilage. The epiphyseal plate forms cartilage on the epiphyseal end. Cartilage is calcified on the diaphyseal side, and the diaphysis lengthens.
It starts to grow longer
After absorption, long-chain fatty acids and monoglycerides inside intestinal cells are
After absorption, long-chain fatty acids and monoglycerides inside intestinal cells are reformed into triglycerides.
Where are long chain triglycerides absorbed?As previously mentioned, MCTs do not delay gastric emptying and are absorbed faster in the intestine than MCTs, being transported via blood to the liver.
In this case, long-chain triglycerides are oils or fats of vegetable or animal origin, and are obtained from the reaction between a fatty acid and glycerol.
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5. How can we say that added sugar is not necessary for our health (it's not), when we learned that
aerobic cellular respiration uses glucose as a fuel source? (hint - where did hunter/gatherers our
ancestors, get sugar?)
Answer:
more than likely fruits and berries
or natural sugars
The body does not require any added sugar to stay healthy. Hunters/gatherers and our ancestors consumed fruits and milk that are natural sugar to obtain energy.
What is the difference between added sugar and natural sugar?Natural sugars are found in unprocessed food such as fruits and milk.Fruits contain fructose and milk contains lactose.On the other hand, added sugars are the artificial sweeteners that we often add to our daily diet in the form of white sugars and caloric sweeteners. From the perspective of health, it is always better to opt for natural sugar that keeps our body stable energy and stable metabolism.Added sugars are harmful when consumed in higher quantities.Hence, added sugar is not necessary for our health when we have learned that aerobic cellular respiration uses glucose as a fuel source that can be obtained from natural sugar.
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Read the passage from "Names/Nombres" by Julia Alvarez.
Our first few years in the States, though, ethnicity was not yet “in.” Those were the blond, blue-eyed, bobby-sock years of junior high and high school before the sixties ushered in peasant blouses, hoop earrings, serapes. My initial desire to be known by my correct Dominican name faded. I just wanted to be Judy and merge with the Sallys and Janes in my class. But, inevitably, my accent and coloring gave me away.
Which detail best conveys the main idea that Alvarez wants to fit into her new culture?
Our first few years in the States, though, ethnicity was not yet “in.”
Those were the blond, blue-eyed, bobby-sock years of junior high and high school . . .
. . . before the sixties ushered in peasant blouses, hoop earrings, serapes.
I just wanted to be Judy and merge with the Sallys and Janes in my class.
The detail that best conveys the main idea that Alvarez wants to fit into her new culture is as follows:
I just wanted to be Judy and merge with the Sallys and Janes in my class.Thus, the correct option is D.
What is Ethnicity?Ethnicity may be expressed as the sociable group a person belongs to, and either recognizes with or is determined by others, as a consequence of a mixture of cultural and other elements including the tongue, diet, belief, origin, and physical attributes traditionally associated with race.
The context of this story illustrates the difficulty faced by Alvarez to fit into the American culture as she belongs of Latin origin.
She desired to match in and be tolerated in this civilization and that's why she expresses that she wanted to connect with the Sallys and Janes in her classroom, as they had the American prototype and culture that everyone respected.
Therefore, it is well described above.
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What reduces friction around the lungs as they expand and contract?
The answer choice which reduces friction around the lungs as they expand and contract is; Choice C; Pleural fluid.
What reduces friction around the lungs as they expand and contract?A membrane with two layers, termed the pleura surrounds the lungs. A slippery liquid called pleural fluid acts as a lubricant to reduce friction in the space between those two layers, called pleural cavity during breathing.
Remarks:
A. Surfactant
B. Synovial fluid
C. Pleural fluid
D. Mucus
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When there are a lot of molecules in one place it is considered an area of:
When there are a lot of molecules in one place it is considered an area of high concentration. Details about concentration can be found below.
What is concentration?Concentration can be described as the amount of solute in a solution measured in suitable units.
The concentration of a solution is dependent on the amount of solute molecules in that solution.
A solution is said to have a high concentration if it has more solute molecules while a low concentration has less solute molecules.
Therefore, when there are a lot of molecules in one place it is considered an area of high concentration.
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Active and passive immunity involves all of the following except receiving mother's antibodies through breast-feeding. exposure to a pathogen either naturally or by vaccination. memory B cells responding to a second exposure to the same pathogen. the stimulation of a nonspecific immune defense. receiving mother's antibodies through the placenta.
Explanation:
Immunity is the ability of an animal to resist infection.
There are two types of immunity in the body; INNATE OR INHERITED IMMUNITY AND ACQUIRED IMMUNITY. Inherited immunity it is the type of immunity that one is born with. It is passed from parent to offspring.
Acquired immunity is immunity to particular infections that is not inherited but has developed in the animal's life as it interacts with its environment. Acquired immunity can develop naturally in which case it is called NATURAL ACQUIRED IMMUNITY OR ARTIFICALLY.
ACTIVE IMMUNITY is the form of acquired immunity in which the body produces its OWN antibodies against infections. While PASSIVE IMMUNITY is the form of acquired immunity in which an individual is PROTECTED AGAINST INFECTION BY RECEIVING ANTIBODIES.
NATURAL ACQUIRED IMMUNITY
when attacked by the same pathogens again, they don't became seriously ill. this is because memory cells are able to recognise the antigens and stimulate the immune system to produce antibodies against the pathogens. This is known as NATURAL ACTIVE ACQUIRED IMMUNITY. It develops when one recovers from an infection.
During pregnancy, the mother passes antibodies across the placenta to the foetus. At birth the baby gets antibodies from the mother through breast milk. This is natural passive acquired immunity.
The major pathway of communication between the right and left hemispheres is the:.
The major pathway of communication between the right and left hemisphere is the corpus callosum.
The cerebrum is the recognizable gray covering of the human brain, appearing to comprise the majority of its mass. The cerebral cortex is the wrinkly area; the remainder of the anatomy is hidden behind that layer. The longitudinal fissure, which is a significant gap between the two sides of the cerebrum, exists. It divides the brain into right and left cerebral hemispheres, which are two independent parts. The main channel for communication between the two hemispheres of the cerebral cortex is provided by the white matter of the corpus callosum, which is located deep inside the cerebrum.learn more about corpus callosum here: https://brainly.com/question/13094825
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This diagram shows a chemical reaction in which two glucose molecules combine to form a molecule of maltose.
Drag the labels to their appropriate locations in the diagram.
First, drag the labels of Group 1 to their respective targets to identify the types of sugars and the type of reaction shown.
Then drag the labels of Group 2 to their respective targets to identify the atoms, chemical groups, or molecules involved.
Not all labels will be used.
Option A is amino acids and D is peptide bond.
How protein is formed?Proteins are the polymer of amino acids which means that large number of amino acid combines to form protein molecule. The function of protein is to make muscle cells inside the body. The bonds present in protein are peptide bonds.
Proteins made up the structure of many enzymes or in other words, Enzymes are proteins that are comprised of amino acids which are linked together in one or more polypeptide chains.
So we can conclude that Proteins are the polymer of amino acids.
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Growth of chest hair, deepening of the voice, and muscle growth are secondary sex characteristics. Which structure or structures produce substances most likely to affect the development of these traits?
testes
ovaries
prostate gland
vulva
Answer:
testes
Explanation:
The increased secretion of testosterone from the testes during puberty causes the male secondary sexual characteristics to be manifested. In males, testosterone directly increases size and mass of muscles, vocal cords, and bones, deepening the voice, and changing the shape of the face and skeleton.
Answer:
testes
Explanation:
Growth of chest hair, deepening of the voice, and muscle growth are secondary sex characteristics and their developments are affected by testes
