Answer:
When you are hungry your brain signals your digestive system to prepare for food. This leads to stomach growling. Your brain does this because it knows that you are hungry, and consequently the brain signals the digestive muscles to contract. There is also, usually, some gas in the intestines and stomach. The noises come out when the mixture of the gas and fluid, digestive juices, squirt through a opening that separates the stomach and small intestine.
Sometimes the noises happen because of an excessive amount of gas in the small intestine.
What is the role of mucus and cilia in the respiratory tract?
The role of mucus and cilia in the respiratory tract is to block foreign particles from entering the nose.
The respiratory tract consists of the nasal cavities, pharynx, larynx, trachea, bronchi, bronchioles, alveoli and lungs. The nasal cavity in the respiratory system has a function to continue the incoming air then leads to the throat.
In the nasal cavity there is a mucous membrane which is the receipt of the mucous membrane and cilia of the nose hair which is very fine. Mucus is made of mucin and water which forms a sticky gel whose role is to trap bacteria, viruses, dirt and dust from outside so it doesn't enter the nose. While the cilia play a role in filtering air through their fine hairs which will prevent dirt from entering the nose.
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Which evidence best supports the claim that mutations are a source of inheritable genetic variation?
ANSWER: Mutations affect protein synthesis which impacts the way traits are expressed.
Sickel cell anemia. What type of mutation error has occurred to cause the disorder shown?
ANSWER: substitution
Examine the two strands of DNA below. Which kind of mutation occurred?
Original strand: AGC GTA CCC TAC
New strand: AGC GTA ACC TAC
ANSWER: substitution
Millions of years ago, the ancestors of giraffes had short necks and used to eat leaves from the bushes on the ground. A genetic mutation caused one giraffe's neck to be taller. This long-necked giraffe was able to eat leaves that were higher up on trees. This gave it an advantage as it was able to access more food than other giraffes. Over millions of years, all of the giraffes became long-necked. Which type of environmental factor caused this mutation to be inherited?
ANSWER: food availability
What is one way that a frameshift mutation could occur?
ANSWER: two nucleotides are deleted
The insertion or deletion of nucleotide bases in amounts that are not multiples of three is referred to as a frameshift mutation in a gene.
What is Frameshift mutation?This is significant because a cell reads the genetic code for proteins in groups of three nucleotides.
These so-called "triplet codons" each stand for one of the 20 different amino acids that go into making a protein.
The entire gene sequence after the mutation will be misread if a mutation alters this regular reading frame. This may lead to the incorrect amino acids being added to the protein or the development of a codon that prevents the protein from getting longer.
Therefore, The insertion or deletion of nucleotide bases in amounts that are not multiples of three is referred to as a frameshift mutation in a gene.
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Which of the following statements is true?
a) The world's population is equally distributed.
b) Over 90% of population growth occurs in rural areas.
c) Almost one-third of the world's population has limited access to clean water.
d) The most populous countries are the United States and China.
20 points
Over 90% of population growth occurs in rural areas.
What is Population?
The term "population" refers to all citizens who are either permanently residing in a country or who are just passing through. This indicator reveals how many people typically reside in a certain area.
Growth rates are the population changes that occur each year as a result of births, deaths, and net migration.
The total population also includes national military forces deployed overseas, merchant mariners at sea, diplomatic staff based abroad, civilian foreign nationals residing in the nation, and internally displaced people residing in the nation.
Therefore, Over 90% of population growth occurs in rural areas.
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David is growing algae in a closed bottle for an experiment. The bottle is half full of water and half full of air. David floats the bottle in a pond for three weeks. At the end of the three weeks, David notices that lots of algae grew, but the bottle did not sink lower in the pond. Why didn't the bottle of algae grow heavier
The growth of the algae came from the air and water in the bottle. A typical summertime annoyance is the proliferation of algae. These little creatures enjoy attaching to cracks in used returnable bottles. Algae can grow rapidly in a bottle of water because of the sunlight and warmer temperatures.
The organisms are quite tough, even after the bottles have gone through the water cycle. The algae can then receive sunlight as a result. Clear plastic and glass containers are both suitable options. You may use something smaller, like a plastic water bottle, or something bigger, like a tiny aquarium, to cultivate algae for a science air project. Algae can also grow in environments that are highly wet but are not aquatic. For instance, the rocks next to a creek or river might be sufficiently moist to support a thick layer of algae.
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Why is the structure of a nucleosome so important?
A. It allows DNA to fit in the nucleus.
B. It helps the DNA exit the nucleus.
C. It tangles the chromatin.
D. It replicates the DMA.
Answer:
Hi, I'm going to say A since The DNA supercoils itself with the help of various proteins to get a compressed shape so that it can fit and be packaged inside the nucleus of the cell.
Please correct me if I am wrong :)
Have a nice day
Explanation:
PLEASE HELP ASAP!!!
Why is meiosis called a reduction division process?
A.Because the cell starts with a diploid number of chromsomes and ends up as haploid
B.Because the cell loses some chromosomes in the process
C.Because the cell is reduced to half the number of chromosomes before it divides
D.Because the number of cells are reduced before meiosis takes place.
Answer:
A.Because the cell starts with a diploid number of chromsomes and ends up as haploid
A current-carrying wire is positioned vertically. The current in the wire is moving upward. If you move a compass slowly around the wire, how would the direction of the compass needle change?
A.
The compass always points in the same direction.
B.
The compass needle would rotate clockwise.
C.
The compass needle would rotate counterclockwise.
D.
The compass needle would spin erratically.
Assume that a new species of fish has been discovered deep in the ocean. It has a complete vertebral column made of cartilage. Which class should the new species be placed in? Name one other trait you would expect to find in the new species of fish. Explain your answers.
Assume that a new species of fish has been discovered deep in the ocean. It has a complete vertebral column made of cartilage therefore the class which the new species will be placed in is Chondrichthyes and also have cartilaginous endoskeleton.
They are referred to as a class that contains the cartilaginous fishes that have skeletons primarily composed of cartilage and examples include sharks, whales etc.
They usually have a pair of jaws and are found in marine environment. the presence of calcium salts in this type of environment is what gives rise to them having cartilages as their vertebral column and endoskeleton which are the features present in fishes under this class and is therefore the reason why it was chosen as the correct choice.
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9. What is the name of the test used to detect the presence of mutagens?
When dissecting a mammalian kidney in your lab, what is recommended plane of section to view the majority of the internal structures
When dissecting a mammalian kidney in your lab Coronal plane is recommended plane of section to view the majority of the internal structures.
In vertebrates, the kidneys are two reddish-brown, bean-shaped organs. They are situated on the left and right sides of the retroperitoneal region. Blood enters them through the paired renal arteries, and it leaves through the paired renal veins. A ureter, a tube that transports expelled urine to the bladder, is connected to each kidney.
The kidney takes involved in the regulation of toxin elimination, fluid osmolality, acid-base balance, various electrolyte concentrations, and volume of various body fluids.
Anatomically, the body is divided into dorsal and ventral parts by the coronal plane. It is parallel to both the transverse and sagittal planes.
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HURRY I NEED HELP PLEASE
How might a mutation affect the active site of an enzyme?
A mutation that occurs in a region of the DNA that codes for an amino acid sequence found in the active site of an enzyme can change the folded morphology of the active site and its affinity for its substrate.
Large regions of DNA can replicate when there is a mutation, usually as a result of genetic recombination. Animal genomes duplicate tens to hundreds of genes per million years, creating a significant genetic resource for the generation of new genes. The bulk of genes can be classified into bigger gene families that share an ancestor using sequence homology. The procedures that most typically result in novel genes are the duplication and mutation of an ancestral gene or the recombination of segments from several genes to create new combinations with novel functions. When connected, protein domains work as modules, each with a distinct purpose, to create genes that code for new proteins with unusual features.
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❗❗PLEASE HELP❗❗Light from stars provides evidence that the universe is expanding. How does light from stars indicate the universe is expanding?
A. The light waves from the stars get "squished together."
B. The light waves from the stars become "stretched out."
C. The light waves from the stars look bluer than they should.
D. The light waves from distant stars look white and small.
Answer:
its B
Explanation:
I took the Quiz
Your cells need sugar to create energy and survive and they get sugar from the food you eat. Once your food is digested, sugar molecules travel through the bloodstream and then will be transported into your cells. Diffusion only allows sugar to be transported into a cell until it reaches equilibrium so how can your cell bring in even more sugar after it has reached an equilibrium
A cell uses a variety of procedures to turn carbohydrates into energy. The initial and most fundamental one is known as glycolysis. Hexose sugars are used to fuel it. This lengthy procedure only expels a modest quantity of energy.
The energy needed by your body to function comes from glucose. The body receives glucose from the consumption of carbs. You get four calories of energy from every gramme of carbohydrates you eat. When you consume carbs, your digestive system uses specialised enzymes to convert them into glucose, a type of simple sugar.
Function of sugar in the body The body uses carbohydrates as fuel to produce energy.
Foods high in carbs are converted by the body into glucose, which can then travel through the bloodstream. For the brain, central nervous system, and red blood cells to operate properly, some glucose is required.
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The following list describes a certain set of objects in our solar system.
no solid surfaces
thick atmospheres
many rings and many moons
Which is the most likely set of objects described by this list?
The correct answer would be inner planets, Terrestrial planets is another name for the inner planets.
What are inner planets?There are a total of eight planets in our solar system. The outer planets and the inner planets are two other major groups into which planets can be divided. Earth, Mercury, and Mars are considered inner planets since they are situated within the asteroid belt (region of asteroids between Mars and Jupiter). Furthermore, because they are made of minerals and metals, inner planets differ from other planets in terms of their composition. These planets are also referred to as terrestrial planets because of their makeup.
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A couple has a daughter with Turner syndrome, a condition in which only a single copy of the X chromosome is present. This results from nondisjunction, the failure of the X chromosome to segregate properly during meiosis. During which meiotic division, and in which parent, could nondisjunction have occurred to produce a child with this condition
Turner syndrome (XO) in women have to give up end result from non-disjunction for the duration of Meiosis II.
Meiosis II withinside the mother, wherein she may be capable of produce 50% eggs having 2X chromosomes at the same time as the rest 50% will now now not have any X chromosome. When the latter type (O) of eggs fuse with the X chromosome containing sperms paperwork the father, it will be a XO genotype female with Turners syndrome Another possibility is non-disjunction for the duration of Meiosis II withinside the father. In meiosis II, the sister chromatids separate, making haploid cells with non-duplicated chromosomes. There are divisions in meiosis; the primary department is meiosis I: the quantity of cells is doubled however the quantity of chromosomes is not. This consequences in half of of as many chromosomes in line with cell. The 2d department is meiosis II: this department is like mitosis; the quantity of chromosomes does not get reduced.
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Name each organic compound
Answer: sorry i acidentally answered ur question TT u can report me po
Explanation:
Some people worry that the increasing number of cell phones will cause cancer because of the energy of the radio waves they emit. Cell phones are a new technology that only recently became widely used. And because cancer takes years to develop, the amount of risk is not yet known.
Answer:
No.
Explanation:
There is no clear evidence which indicates that cell phones will cause cancer because they emit very low intensity of radio waves but it can cause other diseases. Diseases such as brain tumor, male infertility and ear hearing function can be adversely affected by using cell phones due to the radio wave they emit. So we can say that cell phones will not the cause of cancer disease.
Answer:
No, the increasing number of cell phones will not the cause of cancer because it emits low intensity of radio waves. Radiations such as x-rays, gamma rays, alpha particles, beta particles, and neutrons are responsible for causing damage to the cell and the main cause of cancer. High intensity of radio waves heats up the cells not causing cancer disease so we can conclude that the increasing number of cell phones will not cause cancer disease in humans.
Explanation:
Describe the possible effect of a thick cuticle layer in drought conditions.
esto da como resultado una tasa de transpiracion y una disminucion de de transpiracion por depocito de capa de lipidos en la superficie de las hojas en exposicion a sequia moderada
Which structure fuses to form a diploid zygote during sexual reproduction?
Answer:During sexual reproduction, two haploid cells, called gametes, fuse to form a diploid cell called a zygote. In animals, the gametes are sperm and eggs, and the process by which they fuse is called fertilization. In plants, the gametes are produced by the male and female reproductive cells, called the microgametes and the megagametes, respectively, and the process is called syngamy.
During fertilization in animals, the sperm penetrates the egg, and the nuclei of the sperm and egg fuse, combining their genetic material. This forms the diploid zygote, which then undergoes cell division to form a multicellular organism.
In plants, the fusion of the microgametes and megagametes occurs at the tip of the pollen tube and the egg cell. This process is called double fertilization, which leads to the formation of a diploid zygote and a triploid cell called the endosperm, which provides nourishment for the developing seed.
In both case, sperm and egg or micro and mega gametes are the structure fusing to form diploid zygote during sexual reproduction.
Does Mars have seasons? Explain how you know.
help me please will give brainly
There are several terms that are used to describe invasive species. What are some of them? Try and come up with at least two other terms.
Pest species.
Nuisance species.
Weeds (In reference to plants)
Harmful non-native species.
Which of the following sources of information always includes articles that have been reviewed by scientists who are experts in fields relevant to the
published articles?
A. Scientific journal
B. Newspaper
C. Magazine
D. Radio
HELP PLEASE!!
The membrane-bound compartment indicated by structure D contains which of the following?
O ribosomes O oxidases and catalases O hydrolytic enzymes O nucleic acids
The membrane-bound compartment indicated by structure D contains is d)nucleic acids.So,correct option is d.
Nucleic acids are biopolymers, macromolecules, vital for all known types of life.[1] They are made out of nucleotides, which are the monomers made of three parts: a 5-carbon sugar, a phosphate bunch and a nitrogenous base. The two fundamental classes of nucleic acids are deoxyribonucleic corrosive (DNA) and ribonucleic corrosive (RNA). On the off chance that the sugar is ribose, the polymer is RNA; assuming the sugar is the ribose subordinate deoxyribose, the polymer is DNA.
Nucleic acids are regularly happening engineered combinations that go about as the fundamental information passing on particles in cells and make up the genetic material. Nucleic acids are found in flood in each and every living thing, where they make, encode, and subsequently store information of every single dwelling cell of every single life-structure in the world.
Hence, correct option is d.
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(Complete question) is:
The membrane-bound compartment indicated by structure D contains which of the following?
a)ribosomes
b)oxidases and catalases
c)hydrolytic enzymes
d)nucleic acids
What type of natural resource can be replenished naturally over time?
A. Renewable resources
B. Non-renewable resources
C. Industrial resources
D. Fossil fuels
Please answer all and make sure they are correct!!!!!!!! 50 POINTS
I know its a lot sorry..... :(
---------------------------------------------------------------------------------------------------------------------Name all the Five Extinctions.
When did they happen?
What are the causes?
What are the top three groups that became extinct?
What is a coal gap?
What is a coral gap?
Which is the biggest extinction?
How many years did it take for the ecosystems to recover after the Permian Triassic Mass Extinction?
Which mass extinction is the briefest among all five mass extinctions?
How big was the hole created by the asteroid when it hit the earth?
Which mass extinction had the biggest deep ocean extinction?
----------------------------------------------------------------------------------------------------------------------------
!!!!! 50 POINTS !!!!!! !!!!! 50 POINTS !!!!!! !!!!! 50 POINTS !!!!!!
Please make sure your answer is correct!! Thank you.
Ordovician end (444 million years ago; mya), Devonian, late (360 mya), Final Permian (250 mya), People frequently confuse the end of the Triassic period (200 mya) for the extinction of the dinosaurs.
What is mass extinction?
End of the Cretaceous (65 million years ago), the dinosaur extinction catastrophe. The primary reason for contemporary extinctions is habitat destruction.
Permian and the beginning of the Triassic periods, some 250 million years ago, Earth went through its worst environmental catastrophe ever.
The crater's diameter and depth are estimated to be 180 kilometers (110 miles) and 12 miles.
Therefore, around 252 million years ago, the end of the Permian epoch was marked by the greatest extinction in Earth's history.
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Nutrients and ions can pass directly from cell to cell through special membrane junctions known as ________.
Nutrients and ions can pass directly from cell to cell through special membrane junctions known as gap junctions.
Gap junctions are structures composed of transmembrane proteins that enable communication between cells. They are found in most animal cells and play a critical role in the coordination of cellular activities.
Gap junctions are important for maintaining homeostasis in the body. They allow for an exchange of ions, metabolites, and other molecules between cells. This process helps to maintain a balance of nutrients and ions throughout the body. Gap junctions are also involved in the coordination of cellular activities such as cell growth, differentiation, and cell migration.
Gap junctions are composed of two connexons, or hemichannels. The connexons are composed of six transmembrane proteins, referred to as connexins. The connexins form a channel between the two cells, allowing for the exchange of small molecules and ions. The connexons can open and close in response to a variety of external and internal signals, allowing for a tightly regulated exchange of materials.
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What is a characteristic displayed in an organism?
Answer: All living organisms share several key characteristics or functions: order, sensitivity or response to the environment, reproduction, growth and development, regulation, homeostasis, and energy processing.
All carbonate minerals contain the elements
A. carbon dioxide and oxygen
O B. silicon and oxygen
O C. sulfur and four carbon oxygen atoms
O D. carbon and three oxygen atoms
Answer:
D. Carbon and three oxygen atoms
Explanation:
All carbonate minerals contain one carbon atom bonded to three oxygen atoms.
The correct option is A. All carbonate minerals contain the elements
carbon, oxygen, and also one or more metal elements.
How carbonate ion is made?The carbonate ion (CO32-) consists of one carbon atom and three oxygen atoms, and it is this ion that forms the basis of all carbonate minerals.
When carbon dioxide (CO2) dissolves in water, it forms carbonic acid (H2CO3), which can then react with minerals that contain metal ions, forming carbonate minerals. Examples of carbonate minerals include calcite, dolomite, and aragonite.
The most common carbonate mineral is calcite, which is a polymorph of the mineral calcium carbonate (CaCO3). Other carbonate minerals include aragonite, dolomite, magnesite, and siderite.
These minerals are important economically because they are used as building materials, as sources of metals such as magnesium and iron, and in a wide range of industrial applications.
Carbonate minerals are also important in the geological record because they can provide information about the environmental conditions in which they formed.
For example, the isotopic composition of carbon and oxygen in carbonate minerals can be used to determine the temperature and salinity of the water in which they formed. Carbonate minerals can also be used to study the history of Earth's climate, as changes in the amount of carbon dioxide in the atmosphere are reflected in the isotopic composition of carbonate minerals in sedimentary rocks.
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Identify the types of biodiversity AND explain why biodiversity is important.
Pls no links
Answer:
Here to help!
Explanation:
Species diversity, genetic diversity, ecosystem diversity, functional diversity. biodiversity. the variety of the earth's species, the genes they contain, the ecosystems in which they live, and the ecosystem processes of energy flow and nutrient cycling that sustain all life! Biodiversity boosts ecosystem productivity where each species, no matter how small, all have an important role to play. For example, a larger number of plant species means a greater variety of crops; greater species diversity ensures natural sustainability for all life forms; and healthy ecosystems can better withstand and recover from a variety of disasters.