select two organs in the digestive system that provide only mechanical digestion of food.
pancreas
mouth
small intestine
esophagus
liver/gall bladder
anus
large intestine
stomach
Answers
Answer: Esophagus and small intestine
The esophagus and the mouth are two organs in the digestive system that provide only mechanical digestion of food.
What is mechanical digestion?Mechanical digestion is the process by which food is mechanically broken down into smaller pieces through physical means, such as chewing and grinding. This process occurs in the mouth and is facilitated by the teeth, which mechanically break down food into smaller pieces through chewing, grinding, and crushing. The tongue also helps to mix and move food around in the mouth.
The esophagus is a muscular tube that connects the mouth to the stomach. It uses muscular contractions, called peristalsis, to move food down to the stomach. The esophagus does not contain any digestive enzymes, so it does not contribute to chemical digestion of food.
The mouth is also an important site of mechanical digestion. The teeth in the mouth mechanically break down food into smaller pieces through chewing, grinding, and crushing. The tongue also helps to mix and move food around in the mouth. Like the esophagus, the mouth does not contain any digestive enzymes, so it does not contribute to chemical digestion.
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Related Questions
One of the largest and oldest organisms on earth is located in fish lake and nation, forest, in utah.pando is an 80,000 year old grove of aspen trees that cover 100 acres. Although it looks like a forest, DNA analysis of several of the trees has confirmed it is really just one huge organism. Therefore the trees must have been reproduced
Answers
Pando aspen grove in Utah is an immense, genetically identical organism consisting of interconnected aspen trees spanning 100 acres and estimated to be around 80,000 years old.
One of the largest and oldest organisms on Earth, known as Pando, is located in Fish Lake National Forest in Utah. Pando aspen grove is an 80,000-year-old grove of aspen trees that covers approximately 100 acres. While it appears to be a forest, DNA analysis of several of the trees has revealed that they are genetically identical, confirming that Pando is actually one immense organism. The trees of Pando have been reproduced through a process called vegetative reproduction, where new shoots and stems emerge from the existing root system. This unique reproductive strategy has allowed Pando to persist and expand over thousands of years, making it a remarkable example of the interconnectedness and longevity of living organisms.For more questions on Pando aspen grove:
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a homozygous red-eyed female drosophila mates with a red-eyed male drosophila. what proportion of the female offspring will have white eyes?
Answers
Sex-linked genes are located on sex chrosomomes and that are inherited together with them. If a X⁺X⁺ red-eyed female drosophila mates with a red-eyed male, 0% of the progeny will have white eyes. Option 2.
What is a sex-linked gene?Genes are physically located and arranged in the chromosomes.
Each chromosome contains several genes that vary in length and code for different traits. So, all chromosomes are different, except for the homologous ones.
When talking about sex-linked genes, we refer to genes located in one of the sex chromosomes. In general, genes are linked to the X chromosome.
Being linked to one of the sex chromosomes means that these genes, and their corresponding alleles, will only be inherited together with the chromosome.
In the case of X-linked genes, a male that inherits the X chromosome from a heterozygous female can express either the dominant or the recessive trait, depending on which allele it got from the mother.
Eye color in drosophila is an x-linked trait and the gene responsible for the trait expresses complete dominance. This means
the dominant allele, +, codes for red eyes the recessive allele, -, codes for white eyes.Genotypes Phenotypes
X⁺X⁺ Red-eyed female
X⁺X⁻ Red-eyed female
X⁻X⁻ White-eyed female
X⁺Y Red-eyed male
X⁻Y White-eyed male
If a red-eyed female (X⁺X⁺ or X⁺X⁻) mates with a red-eyed male (X⁺Y), the progeny will ONLY express red eyes.
This is because each parent provides an X chromosome to the progeny.
The male can only transmit the X⁺ chromosome that codes for red eyes.
Considering complete dominance, even if the female transmit the X⁻, the progeny will express the red phenotype.
The correct option is 2, 0% of the progeny will have white eyes.
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Complete question,
If a homozygous red-eyed female drosophila mates with a red-eyed male drosophila. what proportion of the female offspring will have white eyes?
50%0%25%75%100%predict how each mutation would affect the amount (mass) of dna in calix’s cells. mass of dna increase decrease no change point mutation chromosomal rearrangement nondisjunction
Answers
Mutations refer to the changes that occur in the DNA sequence of a gene or chromosome. In point mutation, one base of DNA is replaced by another base, while in chromosomal rearrangement, there is a change in the arrangement of DNA in chromosomes.
Mutations refer to the changes that occur in the DNA sequence of a gene or chromosome. In point mutation, one base of DNA is replaced by another base, while in chromosomal rearrangement, there is a change in the arrangement of DNA in chromosomes. Nondisjunction occurs when chromosomes fail to separate during cell division. Mutations can affect the amount (mass) of DNA in cells in different ways. Let’s explore each mutation: Point mutation: A point mutation is a change in one nucleotide (base pair) of the DNA sequence. This can lead to the alteration of the gene’s sequence and structure, thereby changing the function of the gene product. The impact on the amount of DNA in the cell is usually negligible, and there may not be any change in the mass of DNA. Chromosomal rearrangement: Chromosomal rearrangements occur when part of a chromosome is moved to another part or when the order of the genes in a chromosome is altered. This can affect the amount of DNA in cells because the gene copy number changes. Depending on the type of rearrangement, the mass of DNA can either increase or decrease. Nondisjunction: Nondisjunction is the failure of chromosomes to separate during cell division. This can lead to an abnormal number of chromosomes in daughter cells. The amount of DNA in cells can be affected because an extra chromosome or a missing chromosome can be inherited. This can lead to an increase or decrease in the amount of DNA in cells. In summary, point mutation is unlikely to affect the mass of DNA, while chromosomal rearrangement and nondisjunction can either increase or decrease the amount of DNA in calix’s cells.
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Match the type of boundary with its characteristic.
A. Transform
B. Convergent
C. Divergent
1. Near subduction zones
2. Tension
3. Shearing
Answers
Answer:
Here is the matching of the types of boundaries with their characteristics:
B. Convergent - Near subduction zones
C. Divergent - Tension
A. Transform - Shearing
Which best summarizes the role of DNA in the production of proteins?
o DNA moves to the cytoplasm to build proteins.
o DNA transports amino acids to the ribosomes to make proteins.
o DNA contains the instructions used to make proteins.
o DNA breaks hydrogen bonds between amino acids.
Answers
Answer:I think the answer is “ DNA contains the instructions used to make proteins.”
Explanation:
The role of DNA in the production of proteins is because DNA contains the instructions used to make proteins; that is the third option, as the DNA has the gene necessary to undergo the translation which is necessary to make the protein.
What is the significance of the protein expression?Proteins are essential for the function of all cells and are involved in a wide range of biological processes such as metabolism, cell signaling, and DNA replication, as the enzymes that are necessary for this function are made up of amino acids. Different cancers, genetic disorders, and other diseases happen due to abnormal protein expression, so its study is important in biology and medicine.
Hence, the role of DNA in the production of proteins is because DNA contains the instructions used to make proteins; that is the third option, as the DNA has the gene necessary to undergo the translation which is necessary to make the protein.
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the u. s. forest service notes that the fire suppression policies of the last century were as damaging to the kirtland's warbler population as ddt was to the bald eagle. how can extinguishing a wildfire be a listing factor to this bird's populations? all but one could apply.
Answers
Extinguishing a wildfire can be a listing factor to the Kirtland's warbler populations because it prevents the regeneration of young jack pine forests, which the bird depends on for breeding.
How the fire suppression policies were damaging to the kirtland's warbler population?The Kirtland's warbler is an endangered species of bird that breeds exclusively in young jack pine forests in a few counties in northern Michigan. The U.S. Forest Service notes that fire suppression policies of the last century were as damaging to the Kirtland's warbler population as DDT was to the bald eagle, because these policies prevented the creation of the young jack pine forests that the bird depends on for breeding.
Jack pine cones only open and release their seeds after they have been exposed to high temperatures, such as those produced by a wildfire. Without fire, young jack pine forests do not regenerate, and as older jack pine forests are replaced by other tree species, suitable habitat for the Kirtland's warbler is lost.
Fire suppression policies therefore indirectly harmed the Kirtland's warbler population by reducing the availability of the young jack pine forests that the bird needs for breeding.
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Identify three differences between prokaryotic and eukaryotic
cells.
SELECT ALL THAT APPLY
a capsule
b size
c ribosomes
d pili
Answers
a,b,c and d
Explanation:
Most prokaryotes have capsule but most eukaryotes lack capsule
Eukaryotes are generally larger than prokaryotes
The ribosomes of prokaryotes are smaller than that of eukaryotes
Generally, prokaryotes have pili but pili is absent in eukaryotes
100 POINTS! CORRECT ANSWER GETS BRAINLIEST! Study the image of chromosomes in a human cell. Do the chromosomes in this image belong to a female or a male? Autosomes and Sex Chromosomes You may have noticed in the image of chromosomes in a human cell that all of the chromosome sets are labeled with a number except one set, which is labeled with X and Y. Together, chromosome pairs 1 through 22 makes up your autosomes, which are chromosomes that contain genes for characteristics not directly related to the sex of an organism. Most sexually reproducing species also have sex chromosomes that directly control the development of sexual characteristics. Humans have two very different sex chromosomes: X and Y. In all mammals, including humans, an organism's sex is primarily determined by the XY system. An organism with two X chromosomes is female. An organism with one X and one Y chromosome is male.
Answers
Answer:
Male
Explanation:
Cardiac muscle causes movement in the .
a
bone
b
tendon
c
ligament
d
organ
Answers
d forgive me if im wrong!
Cells responding to the boundary of a surface are subject to less lateral inhibition than cells responding to the center of the same surface. this leads to an effect called:_________
Answers
Less lateral inhibition affects cells that respond to a surface's edge than it does to cells that respond to the surface's center. This results in a phenomenon known as edge enhancement.
What are cells?Cells are the basic building blocks of all living things.. There are many billions of cells in a human body. They provide the body with structure, take in food's nutrients, convert carry out specific actions by converting them into energy.
What are 5 functions of cells?The Purposes of a Cell:
Support and Structure. You are aware that bricks make up a house.Growth. Simple cell multiplication is how tissues form in complex organisms like humans.Transport.Production of energy.Metabolic processTo know more about cells visit:
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1. explain the scientific theory of evolution. include in your explanation how living things evolved from earlier species and how fossil evidence is consistent with this theory.
Answers
The scientific theory of evolution is a well-established explanation for the diversity of life on Earth.
It describes how living organisms have changed and diversified over time, leading to the development of new species from earlier ones.
At its core, evolution states that all living things share a common ancestor and that the process of natural selection is primarily responsible for the observed changes.
According to the theory, the process of evolution occurs through a combination of random genetic variations and natural selection. Genetic variations arise through mutations, which are spontaneous changes in the DNA sequence of an organism's genes.
These mutations can introduce new traits or alter existing ones. When a mutation provides a reproductive advantage, such as increased survival or better adaptation to the environment, individuals possessing that mutation are more likely to survive and pass on the beneficial trait to their offspring.
Over time, these small changes accumulate, leading to the gradual transformation of species. This process is known as speciation. Speciation can occur through various mechanisms, including geographic isolation, where populations become physically separated, and genetic drift, where random changes in gene frequencies happen in isolated populations. As populations diverge and become reproductively isolated from each other, new species can arise.
Fossil evidence plays a crucial role in supporting the theory of evolution. Fossils are the preserved remains or traces of ancient organisms that provide a glimpse into the past. They allow scientists to study the anatomical features of extinct species and compare them to living organisms. Fossils provide a chronological record of life on Earth, showing the progression and transitions of different species over time.
The fossil record demonstrates a pattern of species appearing and disappearing at different geological layers, with simpler organisms found in older layers and more complex ones in more recent layers.
It also reveals transitional forms, which exhibit characteristics of both ancestral and descendant species. These transitional fossils provide tangible evidence of gradual changes and evolutionary links between different species.
For example, the discovery of fossilized remains of ancient fish with limb-like fins helps support the idea that fish evolved into land-dwelling animals. Fossils of early bird-like dinosaurs with feathers provide evidence for the evolution of birds from reptilian ancestors.
These and many other fossil discoveries provide strong support for the idea that living things have evolved from earlier species through a gradual process of modification and adaptation.
In summary, the theory of evolution explains how living organisms have changed over time and how new species have arisen from earlier ones. It combines the concepts of genetic variation, natural selection, and speciation to describe the processes behind these changes.
Fossil evidence further corroborates this theory by providing a record of past life forms and transitional fossils that illustrate the gradual transformations observed in the history of life on Earth.
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Which of the following could be the constructor for the Dog class?I.public Dog(String color) { super.type = "Dog"; this.color = color; }II.public Dog(String color) { super("Dog"); this.color = color; }III.public Dog(String type, String color) { super(type); this.color = color; }
Answers
Option II could be the constructor for the Dog class.
Option II, public Dog(String color) { super("Dog"); this.color = color; }, is a valid constructor for the Dog class. It takes a String parameter "color" and initializes the color variable with the provided value. The line "super("Dog");" calls the constructor of the superclass (presumably Animal) with the argument "Dog," indicating that the type of the Dog object being created is "Dog." This line ensures that the appropriate superclass constructor is called before executing the rest of the Dog constructor. This constructor sets the type of the Dog object to "Dog" and assigns the specified color.
Option I, public Dog(String color) { super.type = "Dog"; this.color = color; }, is not a valid constructor because it attempts to assign a value directly to the super's type variable, which is not allowed.
Option III, public Dog(String type, String color) { super(type); this.color = color; }, is not a suitable constructor for the Dog class because it requires two parameters, "type" and "color," whereas the task specifically asks for a constructor that only takes one parameter, "color."
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Construct an Explanation How does the struc ture of an amino acid relate to its function in cellular processes ? Use the role of amino acids in the structure of proteins as supportive evidence .
Answers
Answer: amino acids chains together to form specific protein.
Explanation: the unique amino acid sequence of a protein is shown in its unique folded structure.the structure in turn, determines the protein function. this is why mutation that alter amino acid sequence can affect the function of a protein.
why is newtons cradle (newtons balls) described as an “almost-ideal” closed system? explain your reasoning in 1 to 2 sentences.
Answers
The reason that newtons cradle (newtons balls) described as an “almost-ideal” closed system is because Due to the little forces that are exerting themselves onto it, it is a closed system. solely air resistance and gravity
What is the newtons cradle about?
Tn regards to the above case, it is a system that is almost completely isolated from its surroundings, Newton's cradle is referred to be an almost ideal closed system.
This indicates that the system is largely self-contained and does not interact with the environment to exchange matter or energy.
In Newton's cradle, a set of metal balls are suspended from a frame as the system. The other balls swing back and forth when one ball is pushed back and released, striking them in the process.
Therefore, The balls do not gain or lose energy during the impact since this motion is nearly completely elastic. The system is therefore almost closed and does not exchange energy with its surroundings.
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(please help i will give brainliest)
If given a 5kg ball, 8kg ball, and a 10kg ball, if the same force is applied to each, which one would accelerate the most?
a
10 kg
b
They would all accelerate the same, since it is the same force.
c
8kg
d
5 kg
Answers
Answer:
8kg
Explanation:
mark brainliest
layer of connective tissue that surrounds a skeletal muscle
Answers
The layer of connective tissue that surrounds skeletal muscles are epimysium, perimysium and endomysium.
Three layers of connective tissue are found in the muscle. The outermost layer which surrounds the muscle organ is known as the epimysium.
The middle layer is the perimysium that surrounds each fascicle and the innermost layer is the endomysium that surrounds the muscle fibres.
Muscles are comprised of connective tissue, blood vessels, nerve fibres and muscle fibres. Three layers of connective tissue help provide structure for the muscles.
The three different layers of connective tissue that surround skeletal muscle tissue are:
Endomysium - the connective tissue layer that surrounds separate muscle fibres is the endomysium.
Perimysium - the perimysium is the connective tissue layer that surrounds muscle fibre bundles.
Epimysium - the epimysium is the connective tissue layer that separates muscle from other tissues and organs in the area.
Every skeletal muscle is also richly supplied by blood vessels for waste removal, oxygen delivery and nourishment. Every muscle fibre in a skeletal muscle signals the fibre to contract which is supplied by the axon branch of a somatic motor neuron.
The only way to functionally contract a skeletal muscle is through signalling from the nervous system which is unlike cardiac and smooth muscle.
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Which blood vessels experience the sharpest decrease in blood pressure?
A) Systemic venules
B) Systemic veins
C) Systemic arterioles
D) Systemic capillary beds
Answers
Answer:
c.arterioles
Explanation:
Which of the following is NOT a trigger of coral bleaching? death of zooxanthellae whaling acidification increased water temperature
Answers
Answer:
Whaling
Explanation:
The rest have all proved to trigger coral bleaching.
Answer:
whaling
Explanation:
Scientific knowledge A. cannot be modified, even if new information challenges prevailing theories. B. was modified regularly early in human history, but it can no longer be modified. C. must be modified by popular vote from the general public. D. can be modified as new information challenges prevailing theories.
Answers
The ability to use old cells is an advantage of _____.hybridization DNA testingrestriction fragment length polymorphism (RFLP) polymerase chain reaction (PCR) all DNA testing procedures
Answers
The ability to use old cells is an advantage of all DNA testing procedures.
Impressions of tropical swamp plants were observed on rocks in polar regions. The impressions were dark black imprints, which means the fossils are examples of __. The fossils tell us that polar regions __.
blank 1
carbonization
mineralization
trace fossils
blank 2
had tropical plants that could grow in ice
might have had a different climate in the past
will have abundance of vegetation
Answers
Answer:
Impressions of tropical swamp plants were observed on rocks in polar regions. The impressions were dark black imprints, which means the fossils are examples of carbonization, mineralization, and trace fossils.
Explanation:
The fossils tell us that polar regions had tropical plants that could grow in ice,
might have had a different climate in the past, and will have abundance of vegetation.
Describe how the process of apoptosis occurs?
Answers
Answer:
Apoptosis is an orderly process in which the cell's contents break down and are packaged into small packets of membrane for “garbage collection” by immune cells. It contrasts with necrosis (death by injury), in which the dying cell's contents spill out and cause inflammation. Apoptosis removes cells during development.
Apoptosis is a form of programmed cell death that occurs in multicellular organisms.
What is apoptosis ?It is a natural biological process of programmed cell death in which the cells destroy themselves and maintain the smooth function of the body parts.
There are two types cell death such as Programmed death of cells or apoptosis and uncontrolled death or Necrosis.
Apoptosis can occur via two pathway such as Extrinsic Pathway is triggered in response to external stimuli, ligand binding at death receptor and these receptors are called as Tumor Necrosis Factor gene.
Intrinsic Pathway triggered in response to internal stimuli such as biochemical stress, DNA damage and this pathway is modulated Bax, and Bcl-2 molecules.
Apoptosis helps in maintaining homeostasis, proper size of the body, cell number, elimination of unwanted cell, T-lymphocytes etc.
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Which event shows conditions that lead to natural selection?
A-Weeds are removed by a gardener from a public park
B-Wild horses are tamed over many years and selectively allowed to reproduce.
C-A crab produces millions of offspring in a year, but few survive to adulthood.
D-Farmers collect the largest corn seeds to plant in their fields the following year.
Answers
When referring to mitosis where do the Chromosomes from during metaphase
Answers
Answer:
During metaphase, the cell's chromosomes align themselves in the middle of the cell through a type of cellular "tug of war." The chromosomes, which have been replicated and remain joined at a central point called the centromere, are called sister chromatids.
Unusual normality how do Ishmael's silence and interactions with his peers develop his point of view about embracing differences
Answers
Ishmael's silence and interactions concluded how lucky they are to be with their families and a world free of violence.
Unusual Normality is an essay written by Ishmael's Baeh which describes a 12-year-old child who was a child soldier forced to fight with the Rebel groups in the Sierra Leonne. His family was murdered by the rebel groups in the Civil War. It describes the change in his life, a second chance in childhood in America. His friends thought of him as unusually skilled.
The main idea behind this was never to take anything for granted, what you think is nothing for you is everything for someone else.
Hence, Ishmael's silence and interactions concluded how lucky his friends are to be with their families and a world free of violence.
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Select all that apply.
Three diseases discussed in this lesson that can cause diarrhea are:
tetanus
amoebic dysentery
typhus
bacillary dysentery
cholera
food poisoning
Answers
Answer: The three are food poisoning and bacillary dysentery and the last one is amoebic dysentery
Explanation:
how can microscopes help you see cells? first, think of a. good place to collect a sample of cells
Answers
Microscopes helps to see cells by magnifying the sample using the different magnification strength of lens.
Microscopes- A laboratory tool called a microscope is used to look at items that are too tiny to be seen with the human eye. The study of tiny objects and structures under a microscope is known as microscopy. The microscope has 4 objective lenses: Scanning (4x), Low (10x), High (40x), and Oil Immersion (100x).
Cell- The analysis of structure and function of cells is known as cell biology, and it is based on the idea that a cell is the basic building block of all life. A thorough grasp of an organisms and tissues that cells make up is made possible by concentrating on the cell.
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The carbon reactions of photosynthesis are also known as the ______, which occur in the stroma of chloroplasts.
Answers
Answer: calvin cycle
Explanation:
A cell's organelles are suspended within its _____.
A) nucleus
B) cell wall
C) cell membrane
D) cytoplasm
Answers
Who’s know stuff about child development?
Answers
The child development stuff is well known to the doctors and the nurse, and they advise mothers during the time of the pregnancy to take care of the baby in different ways.
What is the role of the medical staff?The medical field employs a variety of personnel, including doctors, experts, nurses, caregivers, and others, but the doctor and nurse roles are directly related to patients. They take care of patients of different types, such as those with minor to major health issues.
Hence, the child development stuff is well known to the doctors and the nurse, and they advise mothers during the time of the pregnancy to take care of the baby in different ways.
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