Answer:
the mouth
Explanation:
food enters the body through the mouth where it is made smaller for the stomach and esophagus by the teeth.
hope this helps ! :3
Based on the pattern of inheritance known as sex linkage, if a male is a hemophiliac, how many genes for this trait are present on the sex chromosomes in each of his diploid cells?
A. 1
B. 2
C. 3
D. 4
Answer:
Based on the pattern of inheritance known as sex linkage, if a male is a hemophiliac, he has two genes for this trait on the sex chromosomes in each of his diploid cells, which is the correct answer choice (B).
Explanation:
In humans, the trait for hemophilia is a recessive trait that is carried on the X chromosome. A male has only one X chromosome and one Y chromosome, while a female has two X chromosomes. This means that a male will express a recessive trait carried on the X chromosome if he inherits a copy of the mutated gene from his mother, while a female will only express the trait if she inherits a copy of the mutated gene from both of her parents.
Since a male hemophiliac inherited the mutated gene for hemophilia from his mother, he has two copies of the mutated gene, one on each of his X and Y chromosomes. This means that there are two genes for this trait on the sex chromosomes in each of his diploid cells.
The other answer choices are incorrect, as they do not accurately reflect the pattern of inheritance for sex-linked traits.
Fruit flies have 8 chromosomes in their body cells, while dandelion cells have 16 chromosomes. Which species do you predict makes the more genetically varied offspring? cite evidence from the model of meiosis to support your prediction.
Offspring of Fruit flies (Drosophila) and dandelion cells have same genetical variability because both of them are diploid cells.
During Meiosis , Each and every diploid species receives the same response.
There are just half as many chromosomes in somatic (body) cells.
Gametes cells have n cells, whereas somatic cells include 2n cells.
Fruit fly (Drosophila) gametes have four chromosomes, but dandelion cells gamete have eight chromosomes.
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7. What is the difference between the
bonds that hold each nucleotide together
and the bonds between the nitrogenous
bases?
Answer:
The bonds which hold the nucleotides together are covalent bonds and the bonds between nitrogenous bases are hydrogen bonds.
Explanation:
I'll just put some additional info here in case you need it:
There are two types of bonds in each nucleotide: glycosidic bond: bond between a nitrogenous base and deoxyribose pentose sugar; and phospho-diester bond: bond between two deoxyribose pentose sugar molecules. Both of these bonds are covalent, meaning that the participating atoms share electrons.
The bonds between nitrogenous bases are hydrogen bonds. Hydrogen bond is an attraction between two atoms that already participate in other chemical bonds. So it is not really "a real bond" but rather electrostatic force of attraction.
which finding provides evidence that opioid drugs enhance the brain reward system in animal models?
Answer:
Opioids are currently the most effective pain relieving pharmaceuticals. However, they are also rewarding and their repeated use can lead to dependence and addiction. In fact, addiction to opioid analgesics is a growing socioeconomic and health problem with potentially serious consequences documented by a rise in deaths due to overdose [1, 2]. A critical CNS locus for opioid reward is the ventral tegmental area (VTA, glossary, vide infra). Recent work indicates that there is great anatomical and pharmacological heterogeneity in VTA neurons and that there are numerous opioid
What mode of nutrition distinguishes animals from fungi, both of which are heterotrophs?.
The mode of nutrition which differentiates animals from fungi, both of them being heterotrophs, is- Ingestion: Eating.
Animals and fungi are both heterotrophs, i.e. they are not able to synthesize their own food like the autotrophs (plants). The only difference between them is that the animals take in their food by means of Ingestion and digest the food inside their body. However, fungi are saprophytic in nature, i.e. they feed on dead and decaying organisms, and are not able to digest the food inside their body.
The question is incomplete. The complete question is:-
Which mode of nutrition differentiates animals from fungi, both of them being heterotrophs?
The options are given below:-
(a) Vitamins: Mode,
(b) Ingestion: Eating,
(c) Mitosis: Scales,
(d) None of the above.
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In the previous section, we saw a molecule made of three atoms to have a linear shape. In this section, we have observed a three atom molecule with a bent molecular shape. What is causing the difference in the two shapes?.
The causing difference in the two shapes is a standard explanation.
For bent vs linear, linear is a straight line with bond angles of 180 degrees. This only occurs when there are no lone pairs to cause repulsion. When there are lone pairs, then the molecule will be bent because the lone pairs cause the bonded elements to move away from the electrons.
Bent = Linear but bent due to the Lone Pairs that it contains, the more Lone Pairs the greater the bent and the smaller the degree.
If you have a lone pair of electrons you know the molecule is bent. In the case of water, there are two bonds connecting to H, but there are also two lone pairs pushing the two bonds, creating a bent shape rather than a straight line.
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essay about the cure for cancer
An essay in regards to the cure for cancer is given below
What is the cure cancer treatment?One of the most dreaded and feared diseases is probably cancer. Nearly 9.5 million individuals worldwide lost their lives to cancer in 2018. According to the World Health Organization, it ranks as the second most common cause of death.
Note Radiation, chemotherapy, and surgery are the most often used treatments. Other choices include hormone therapy, laser therapy, targeted therapy, immunotherapy, and others.
Therefore, The type and stage of a person's cancer, the sort of treatment they can receive, and other factors all affect whether or not their cancer can be cured.
The type and stage of a person's cancer, the sort of treatment they can receive, and other factors all affect whether or not their cancer can be cured.
Therefore, Currently, there is no treatment for cancer. However, if treatment is effective, cancer may enter remission, which indicates that all outward indications of illness have disappeared. The likelihood of remission and a person's prognosis can both be considerably improved by early cancer detection and treatment.
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epithelial cell abnormality atypical squamous cells of undetermined significance.T/F
epithelial cell abnormality atypical squamous cells of undetermined significance true
The most usual aberrant finding on a Pap test is atypical squamous cells with unknown significance. It might indicate an infection with specific strains of the human papillomavirus (HPV) or another infection, like a yeast infection.Can unclear significance atypical squamous cells be cancer?
Undetermined significance atypical squamous cells (ASC-US) — With ASC-US, the chance of cervical cancer is less than 1%, while the risk of a high-grade precancerous lesion (cells with a moderate to high risk of evolving into cervical cancer) is as high as 7%.
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The picture shows a unicellular organism called a
paramecium.
Which structures in a paramecium work together to keep it alive?
A. Specialized cells
B. tissues.
C.organelles
D.organ systems
Answer:
Cilia
Explanation:
The paramecium has many different parts that help it survive, including cilia on the outside of its body. Cilia are tiny hair-like projections that can bend and straighten, propelling the paramecium through watery environments. Movement is important because the paramecium must find food to eat.
Answer:
Organelle
Explanation:
it was correct
A nucleotide deletion early in the coding sequence of a gene would most likely result in __________.
Early deletion of nucleotides in the coding sequence of a gene can result in missense mutation, frameshift mutation, multiple missense mutation and non-functional protein.
A mutation is a change in a short portion of a gene's nucleotide sequence. One nucleotide is frequently replaced by another in point mutations; other changes involve the insertion or deletion of one or more nucleotides. Large deletions can eliminate a whole gene or a number of nearby genes, whereas small deletions just remove one or a few nucleotides from a gene. The impacted protein or proteins' functionality may change as a result of the removed DNA. A frameshift mutation in a gene refers to the insertion or deletion of nucleotide bases in non multiplier numbers of three. This is important because when a cell makes a protein it reads the code for the gene in groups of three bases. A missense variant is a type of substitution in which a nucleotide change replaces one protein building block (amino acid) with another in the protein made from the gene. An amino acid change can alter the function of a protein. Another type of substitution is nonsense transformation. However, instead of a change in one amino acid, the altered DNA sequence results in a stop signal that tells the cell in advance to stop making the protein.
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which of the follow is part of the synthesis view of fiscal policy with which both keynesian and classical economists agree?
Both keynesian and classical economists agree with : Automatic stabilizers help reduce the fluctuations in aggregate demand and output.
What is the fiscal policy ?The use of taxation and expenditure by the government to affect the economy is known as fiscal policy. Fiscal policy is often used by governments to encourage robust, long-term growth and to lower poverty.
The use of taxation and expenditure by the government to affect the economy is known as fiscal policy. Fiscal policy is often used by governments to encourage robust, long-term growth and to lower poverty.
Tax reductions and increased public spending are the two main manifestations of expansionary fiscal policy. Both of these measures aim to boost overall demand while reducing budget surpluses or adding to deficits.
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what does it mean when 30% of the phenotypic variation in a quantitative trait is due to environmental variation
acts on quantitative qualities controlled by several genes, often known as expanding the options Favors at least two phenotypes Specific genotype fitness values are higher inside one environment & lower in another.
Which are the two forms of variation in phenotypes?Phenotypic variation in populations is a result of three nongenetic factors, including stochastic developmental variation or environmentally induced variability (EIV) (SDV).
What do phenotypic and genotypic variation mean?The genotype, which is the actual DNA code, is the combination of alleles in a particular gene.Phenotypic variation—the difference in phenotypes across individuals—can be caused by genetic variation.A genotype's physical expression is called a phenotype.
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the most important step in making sure the proper amino acid is added to a growing polypeptide chain is:
The anticodon that binds to the proper position on the mRNA is only found on the tRNA that carries the subsequent amino acid in the polypeptide chain. By using this approach, the chain's amino acids are inserted in the right order.
What controls the addition of the proper amino acid to the expanding protein chain during translation?The aminoacyl-tRNA anticodon base couples with the mRNA codon at the A (amino acid) site to ensure that the proper amino acid is added to the lengthening polypeptide chain.
What two procedures guarantee that a developing polypeptide chain is augmented with the proper amino acid?First, each aminoacyl-tRNA synthetase only binds a single amino acid to the proper tRNA after recognizing it specifically.
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What evidence do you look for to determine whether a cell is prokaryotic or eukaryotic?
A.)
B.)
C.)
D.)
Answer:
Eukaryotic cells have a distinct nucleus that houses the cell's genetic material, whereas prokaryotic cells lack a nucleus and instead have free-floating genetic material. This is where the two types of cells most significantly diverge.
How do diffusion and osmosis help amoebas survive?
How do diffusion and osmosis limit the size of a cell?
By diffusion and osmosis removing their wastes and supplying them with useful substances help amoebas in survive.
How does diffusion and osmosis help a cell survive?Human existence depends on diffusion and osmosis because they enable cells to passively absorb nutrients and expel waste. This is due to the fact that osmosis and diffusion both entail the net movement of molecules along concentration gradients and as a result, they don't need any energy input to proceed.
Amoeba is assisted in surviving by diffusion and osmosis, which remove their waste and provide them with nutrients. Osmosis and diffusion are both passive processes, meaning they don't need the energy to work.
The maximum size that a single cell may grow to is constrained by diffusion, which only works over a certain distance. Any food and waste requirements of a single-celled microbe, such as an amoeba, may be met through diffusion.
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if a forest fire destroys the vegetation in an area, but left some vestiges of the previously functioning community and the soil intact, what type of succession would follow?
secondary type of succession would follow, if a forest fire destroys the vegetation in an area, but left some vestiges of the previously functioning community and the soil intact.
The life cycle of a plant is characterized by secondary ecological forest fire succession. Secondary succession, as opposed to the first, primary succession, is a process initiated by an event (e.g. forest fire, harvesting, hurricane, etc.) massive wildfires were raging. The alterations that occurred after the California fires are an illustration of secondary succession. The sequence of alterations known as secondary succession take place in an environment that has been disrupted but where soil and organisms are still present.
The complete question is
If a forest fire destroyed the vegetation in an area, but left some vestiges of the previously functioning community and the soil intact, what type of succession would follow?
a. primary
b. secondary
c. tertiary
d. quaternary
e. quinary
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Suppose a true-breeding orange flower is crossed with a true-breeding purple flower. In the next generation, all of the flowers are
purple.
What does this outcome tell you about the allele for orange flowers?
O The orange allele is dominant to the purple allele
O The orange allele shows incomplete dominance.
O The orange allele is recessive to the purple allele
O The orange allele is sex-linked
Answer: The orange allele is recessive to the purple allele.
in tobacco plants, green color (c) is dominant to white (c). you cross 2 heterozygous green tobacco plants. what is the genotypic ratio of the offspring?
If in tobacco plants green color (C) is dominant to white (c) and we cross 2 heterozygous green tobacco plants Cc then the genotypic ratio of the offspring is 1/2 Cc, 1/4 CC and 1/4 cc.
What is a heterozygous individual?A heterozygous individual can be defined as an individual who carries two different gene variants or alleles for a given locus, which in this case is represented by a green color (C) allele that is dominant to the white (c) allele.
In this case, the Punnet square for this genetic cross is:
C c
C CC Cc
c Cc cc
Therefore, with this data, we can see that the genetic cross between heterozygous individuals is able to produce a progeny with a genotypic ratio of the offspring equal to 1/2 Cc, 1/4 CC and 1/4 cc.
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in a phylogeny, information about relatedness is portrayed by the pattern of branching, not by the order of taxa at the tips of the tree.
On a phylogeny, the number of nodes separating two taxa indicates how closely related they are.
What are taxa ?A given taxon typically includes several taxa of lower rank. Taxa are arranged in a hierarchy from kingdom to subspecies. Certain taxonomic categories, which are listed in descending order and include kingdom, phylum (in plants, division), class, order, family, genus, species, and subspecies or race, are universally accepted for the classification of protists, plants, and animals.
Kingdom, phylum, class, order, family, genus, and species are the orderly groups, going from largest to smallest. 2. Each level is referred to as a taxon (plural: taxa) or taxonomic category in taxonomic nomenclature.
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drag each label into the appropriate category to designate which reflex is described by the following terms.
The Spinal Cord's Structures To indicate if a particular item is a component of the CNS, drag each label into the relevant category.
What are the different categories for reflexes?There are two types of reflexes: somatic and autonomic. Smooth muscle, cardiac muscle, and glands are typically activated during autonomic reflexes, which are uncontrollable and mediated by the autonomic division of the nervous system.
What are the many sorts of reflexes?Reflex actions are the unintentional movements of a body component in response to a specific stimuli. Because neither will or consciousness is necessary for access, these activities are automatic. The pupillary light reflex is probably the most widely recognized reflex.
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which product of combustion acts as a chemical asphyxiant by excluding oxygen from the blood, leading to hypoxia of the brain and tissues?
A byproduct of combustion called carbon monoxide functions as a chemical asphyxiant by keeping oxygen out of the blood, which causes hypoxia in the tissues and the brain.
Uncompleted fuel combustion produces carbon monoxide (CO), an odourless, colourless gas. People exposed to CO gas will become ill because the CO molecules in their bodies will replace the oxygen.
Our senses cannot perceive CO because it lacks odour, colour, or taste. As a result, dangerous gas concentrations can accumulate indoors without people noticing until they become ill. Additionally, when someone is sick, they may mistake their symptoms for those of the flu, leading them to miss the early indications of CO poisoning.
As a result, carbon monoxide, a byproduct of combustion, can be said to serve as a chemical asphyxiant by keeping oxygen out of the blood, which causes hypoxia in the tissues and brain.
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Which type of stimulus will maximally activate the sensory receptors within the semicircular ducts?.
Answer:
Rotational Motion
Explanation:
which pathogen causes toxic shock syndrome? group of answer choices vibrio cholerae staphylococcus aureus pseudomonas aeruginosa
Toxic shock syndrome is most frequently brought on by Staphylococcus aureus (staph). Staph is present in the skin and nostrils of about 25% of individuals and animals. Staph can produce toxins that can lead to food poisoning, but in healthy individuals, it typically does not make them sick.
Either streptococcus or staphylococcus bacteria are responsible for toxic shock syndrome (TSS). These bacteria often reside harmlessly on the skin, nose, or mouth, but if they infiltrate deeper into the body, they may emit toxins that affect organ function and tissue.
Hemolysin, exfoliative toxin, enterotoxin, leukotoxin, and toxic-shock syndrome toxin-1 are some of the toxins that S. aureus most frequently secret.
Thus, we can conclude that toxic shock syndrome is brought on by Staphylococcus aureus (staph) germs.
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The speaker compares the students waiting to take their drivers test to deer trapped in headlights in order to
The speaker compares the students waiting to take their drivers test to deer trapped in headlights in order to describe how nervous they look.
A drivers test is important for you to receive your permit within the country. Only with a legitimate permit are you able to ride or drive your two-wheeler and hackney coach in Republic of India. A drivers test contains of a theory half beside a sensible assessment likewise.
To not feel nervous while giving the drivers test, read through and con rules, road sign symbols, and different data which will be necessary to grasp throughout your take a test and this may take a bit of the nervousness away as a result of you’ll be mentally ready to pass the take a look at.
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if you take a test in the same condition in which you studied for the test, you are using ____ _____ learning.
If you take a test in the same condition in which you studied for the test, you are using state-dependent learning.
What is state-dependent learning?State-dependent learning refers to the situation in which the internal state is distinct from the observed and or reported during the training procedure, thereby leading to distinct performance that may impair the final results of the process.
Therefore, with this data, we can see that State-dependent learning is a process associated with the differential state between the internal condition and observations related to such state of the process.
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If there were one trna for every codon that codes for an amino acid, how many different trnas should there be?.
There must be 61 different tRNAs There must be different tRNAs A codon only functions when coding if a tRNA with a complementary anticodon is also found in the same cell and must supply the corresponding amino acid increase
Since most of the 61 sense codons have their own tRNAs in the eukaryotic cytosol, most cells have 40-60 different tRNAs. tRNAs that accept the same amino acid are called iso-accepting tRNAs. Human mitochondria have only 22 different tRNAs, and plant chloroplasts have about 30 different tRNAs. An enzyme that combines specific amino acids. Organisms use up to 20 tRNA synthetases to make aminoacyl tRNAs, one for each of the 20 canonical amino acids. tRNA forms both normal base pairs (5'-UUC-3' codon with 3'-AAG-5' anticodon) and atypical base pairs with the 3rd codon position so it can bind to both codons. (5'-UUU-3'-codon and 3'-AAG-5'-anticodon).
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ascending pathways conduct sensory information upward toward the brain, typically through a relay chain of 3 successive neurons. the neurons in these sensory pathways are called the first-order, second-order and third-order neurons, respectively. select the true statement regarding first-order neurons in somatosensory pathways.
Ascending pathways in ganglions, which contain the cell bodies of first-order neurons, transmit sensory data to the brain, typically via a relay chain of three succeeding neurons.
What exactly are neurons and what do they do?The fundamental constituents of the brain are neuronal cells, commonly referred to as neurones or nerve cells. They are indeed the cells in charge of absorbing sensory data from the environment, directing our muscles with motor commands, and transforming and relaying electrical impulses at each step along the route.
Are neurons restricted to the brain?The brain's neurons are the cells responsible for transmitting and receiving electrical and chemical messages. They serve as the brain's building blocks and carry signals to all of the body's tissues, muscles, and other neurons.
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Wegener's theory of continental drift states that Earth's landmasses once were joined into a supercontinent called Pangaea. The landmasses then slowly drifted to their current positions. How does the evidence below support Wegener's theory?
1. The fit of the coastlines of Africa and South America:
2. Fossils of animals that are found on opposite sides of large oceans:
3. Evidence of north-moving glaciers in tropical southern India:
Answer: 1
Explanation:
A new organism, Organism E, has been discovered. How could scientists use its DNA to compare and classify this new organism?
Scientists can use DNA sequences to help determine if they have discovered a new species. They can also compare DNA sequences from different organisms and measure the number of changes (mutations) between them to infer if species are closely or distantly related.
What is Species?Species may be defined as the collection of organisms that can significantly reproduce with one another in nature in order to produce fertile offspring.
Scientists can also sequence huge chunks of genetic information among different organisms and then compare them to one another. When they do this, they look for strands of DNA -- or RNA or proteins -- that exhibit homologous sequences, or sequences with similar genes on them.
Therefore, scientists use the mechanism of DNA sequencing in order to compare and classify this new organism E.
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does caffeine work through a cns effect or a metabolic effect? what drawback is there for caffeine use?
Yes, It is true that caffeine work through CNS or a metabolic effect. Caffeine can have adverse effects such as restlessness, headaches, insomnia, nervous irritability and premature left-ventricular contractions.
What are some CNS effects of caffeine?Caffeine increases energy metabolism throughout the brain but decreases cerebral blood flow inducing relative brain hypoperfusion. Caffeine activates noradrenaline neurons that affects the local release of dopamine.
Caffeine/coffee stimulates the metabolic rate in control and obese individuals. Long-term effects of caffeine include chronic insomnia, constant anxiety, depression, and stomach problems and it can also cause high blood pressure. In high doses, caffeine can have severe effects on brain, heart and muscle function.
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