Generally speaking, precession is believed to occur as a result of the gravitational forces exerted by the sun and moon as they revolve around the earth. When an object revolves, its axis of rotation exhibits a nodding or swish motion. There is a wobble in the movement of precession. This phenomenon is caused by the gravitational pull exerted by one body upon another, resulting in nutation.
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When is cell-to-cell communication particularly important in regulating gene expression?
Answer:
during embryonic development
Explanation:
Cell-to-cell communication is particularly important in regulating gene expression during the embryonic development.
Cells in the developing embryo are constantly communicating with their neighbors. The molecules used by them in sending and receiving signals are crucial for normal embryogenesis. Various intracellular signaling pathways have been discovered, some of which are activated in response to secreted growth factors.
However, a few important signaling pathways are used often during embryonic development to regulate various cellular processes that shape the developing embryo.
Embryonic development is marked by the thorough regulation of cellular functioning so that the cells proliferate, migrate, differentiate, and form tissues at the correct place and time. These processes are genetically controlled and depend both on the history of cells, their lineage, as well as on the activities of signaling pathways, which coordinate the cell interactions leading to organogenesis.
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What effect does stimulating the vagus nerve have on heart rate? from which subdivision of the autonomic nervous system (ans) does the vagus nerve carry motor fibers?
What happens when vagus nerve is stimulated?
Vagus nerve stimulation stabilizes aberrant electrical activity in the brain by stimulating the vagus nerve with the help of an implanted pulse generator and lead wire. Anti-seizure medications don't completely work for about one-third of epilepsy patients.Why is vagus nerve stimulation used?
Vagus nerve stimulation (VNS) uses the vagus nerve to provide regular, gentle electrical pulses to the brain in an effort to prevent or decrease seizure activity. The procedure involves implanting a device under the skin in the left chest area.Learn more about vagus nerve stimulation
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Do you think the genetic disorders you identified in part a or b would appear in a person’s dna fingerprinting profile? explain your reasoning.
Yes, I believe a person's DNA fingerprint profile would show genetic problems.
It would be visible in a person's DNA fingerprint profile because everyone has some variation in their DNA and genetic abnormalities can be detected in DNA.
What is DNA fingerprinting?The nucleotide sequences of specific areas of human DNA that are particular to each person are utilized in the laboratory procedure known as DNA fingerprinting to ascertain a person's likely identification.
What are genetic disorders?A genetic disorder is a condition that is wholly or partially brought on by a deviation from the typical DNA sequence. A single gene mutation (monogenic disorder), numerous gene mutations (multifactorial inheritance disorder), a combination of gene mutations and environmental factors, or chromosome damage can all result in genetic illnesses.Learn more about genetic disorders here:
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Which protein does not belong in a thin filament? which protein does not belong in a thin filament? tropomyosin actin myosin troponin
Myosin protein does not belong in a thin filament.
What is myosin?Myosin are a class of motor proteins well recognized for their functions in the contraction of muscles and a variety of other eukaryotic motility processes. They are ATP-dependent and in charge of motility based on actin. By Wilhelm Kuhne, the first myosin was identified in 1864.Myosin, the first molecular motor, is a protein that converts ATP-derived chemical energy into mechanical energy to generate force and movement.A fibrous globulin found in muscles that may divide ATP and interacts with actin to generate actomyosin during muscle contraction.Each type of muscle tissue contains the proteins myosin and actin. Thick myosin filaments and thin actin filaments combine to create muscle contractions and movement.The molecular motor known as myosin transforms the chemical energy supplied by ATP into mechanical energy.Learn more about myosin here:
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Bowing to your opponent before a jiu jitsu match would be considered a ________ movement.
Answer:
voluntary, you did it by will
Explanation:
What is the name of the selective agent present in mitis-salivarius agar?
a. tellurite
b. phenol red
c. neutral red
d. eosin
a. Tellurite, is a selective agent which is present in mitis-salivarius agar.
Mitis Salivarius Agar with Tellurite (MSAT) is a type of an enriched selective medium which has application in the isolation of Streptococcus salivarius, Streptococcus mitis and the other oral Enterococci and Streptococci which are found in different clinical specimens.
Peptones are a source of nitrogen, carbon, vitamins etc. and are added to the MSAT. Potassium tellurite and crystal violet are selective agents and can inhibit the growth of most gram negative bacilli and also the most gram positive bacteria excluding Streptococci.
Hence, option a. is the correct option.
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In most species, the expression of hox genes is colinear with the anterior to posterior organization of the organism. what does this mean?
Hox genes, which are members of the homeotic transcription factor family, establish the segment identity of tissues within the embryo and are essential regulators of the body plan along the cranio-caudal axis (also known as the anterior-posterior axis). This means during embryogenesis, these genes expression follows a precise spatial and temporal colinearity pattern from the 3' to the 5' end of each cluster.
This indicates that Hox genes expressed anteriorly in the developing embryo are typically found at the 5′ end of the same genomic area, a phenomenon known as spatial colinearity. In comparison, those expressed posteriorly are typically found at the 3′ end of the Hox cluster.
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The careful combination of various plant proteins to create a complete amino acid profile in one meal is called:____.
The careful combination of various plant proteins to create a complete amino acid profile in one meal is called Complete protein.
The complete protein is said when all the nine essential amino acids in the same amount are provided.
What are the amino acids and its types in humans and plants?Amino acids are a requirement for our body as the non-essential amino acids are produced in our body.
The essential amino acids are those amino acids that are not made by the body and that have to be taken from outside and should be added to the diet regularly for the better functioning of our body.
The nine essential amino acids are Histidine, Isoleucine, Valine, Leucine, Methionine, Lysine, Threonine, Tryptophan, Phenylalanine.
The different plant proteins that create a complete amino acid profile are Quinoa. There are others too that have essential amino acids.
The Plants are the ones that produce all 21 types of amino acids both essential and non-essential amino acids. Animals and humans are unable to produce essential amino acids.
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If a dna sequence is aggtccg in the 5’ to 3’ direction on the parent (template) strand, then the new daughter strand replicated from it should be _____ in the 3’ to 5’ direction.
If a dna sequence is aggtccg in the 5’ to 3’ direction on the parent (template) strand, then the new daughter strand replicated from it should be TCCAGGC in the 3’ to 5’ direction.
What is DNA sequence?The procedure of DNA sequencing involves figuring out the nucleic acid sequence. The DNA's nucleotide sequence. The four bases adenine, guanine, cytosine, and thymine are arranged in this way using any technique or technology.Knowing the placement of the four chemical "bases," or building components, that make up the DNA molecule is known as sequencing DNA. The sequence reveals to researchers the type of genetic data that is stored in a certain DNA segment.Numerous genetic details can be gleaned from the DNA sequence, including genes that code for proteins, regulatory instructions that can turn genes on or off, and disease-causing mutations.Finding the precise nucleotide order of a given DNA molecule is the process of sequencing.Learn more about DNA sequence here:
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True or false
All cells have a nucleus that acts as a command center for the cell.
Answer:
True
Explanation:
it's called the nucleus because that is where the instructions reside for the proteins necessary for cellular functions and for the building blocks of the cellular components
The statement is true for all eukaryotic cells because prokaryotes lack a well-organized nucleus.
The nucleus is called the command center for the cells because it contains the DNA or genes.
The DNA stores the genetic information, which is necessary for building up the cells and their components.
The DNA can be considered a blueprint for the cell. The genes are organized in long linear DNA molecule which is stored inside the nucleus.
The DNA is stored compactly with the help of histone proteins, which helps store the two meters of DNA in a single cell.
The complex genetic information of the cell is stored in the nucleus, and therefore the nucleus is called the command center for the cell.
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Digestion is the __________________. conversion of glycogen to glucose. churning of food in the stomach and intestine. absorption of nutrients suspended in water. breaking down of food into molecules small enough for the body to absorb.
Digestion is the - breaking down of food into molecules small enough for the body to absorb.
What is Digestion?
Breaking down of food into molecules small enough for the body to absorb is a type of chemical digestion. It is a complex process in which the broken down subunits of food particles are absorbed by the lining of alimentary canal with the help of enzymes.
Conversion of glycogen to glucose is called as Glycogenolysis.
Churning actually helps to move chyme ( liquid material ) towards the lower part of the stomach specially towards the pyloric sphincter whereas the absorption of nutrients suspended in water occurs in small intestine.
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The constancy of the chromosome number from one cell generation to the next is maintained through.
Through mitosis, the number of chromosomes is kept constant from one cell generation to the next.
What occurs during mitosis?A cell divides into two identical daughter cells after duplicating all of its components, including its chromosomes. Due to the importance of this procedure, specific genes carefully regulate each phase of mitosis. Health issues like cancer may develop when mitosis is improperly controlled.
How many phases of mitosis are there?Prophase, pro metaphase, metaphase, anaphase, and telophase are these stages.
What function does mitosis serve?Mitosis' purpose is to divide the genome so that the two daughter cells inherit an identical and equal number of chromosomes.
Where in the cell cycle does mitosis occur?The mitotic phase, which consists of mitosis and cytokinesis and produces two daughter cells, begins after interphase. Despite the fact that the two processes frequently overlap, mitosis occurs before cytokinesis.
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What is the immediate source of the energy used to synthesize atp by oxidative phosphorylation in eukaryotic cells?
What is the immediate source of the energy used to synthesize atp by oxidative phosphorylation in eukaryotic cells? The inner mitochondrial membrane's proton-motive force.
What is eukaryotic cells?
Any cell or creature with a distinct nucleus is said to be a eukaryote. The nucleus of a eukaryotic cell, which houses the well-defined chromosomes (bodies holding the genetic material), is surrounded by a nuclear membrane. Organelles such as mitochondria (cellular energy exchangers), the Golgi apparatus (a secretory device), the endoplasmic reticulum (a canal-like structure of membranes within the cell), and lysosomes are also present in eukaryotic cells (digestive apparatus within many cell types). The absence of mitochondria and a nucleus in red blood cells, as well as the oxymonad's lack of mitochondria, are a few examples of exceptions to this rule.
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What are the two basic ""ingredients"" for the synthesis of thyroid hormone?
a. tyrosine and calcium
b. arginine and iodine
c. lysine and calcium
d. tyrosine and iodine
e. dopamine and iron
The synthesis of thyroid hormones requires the iodination of tyrosine molecules and the combination of two iodinated tyrosine residues. thus option D is correct.
What is the function of hormone ?The primary function of a hormone to regulate secreted hormone from endocrine gland is classified functionally as a tropic. The glands of endocrine system create chemical messengers called hormones and it can travel through the blood to various regions of the body.
There are different types of glands such as pituitary, thyroid, parathyroid, thymus, and adrenal glands where Hormones are created and secreted (released) by these glands,
These hormones are situated in the glands and secreted throughout your body, most important glands are adrenal glands include two glands located on top of the kidneys that produce the hormone cortisol.
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What does the fossil trace golf course in golden, colorado, have to do with mineral resources?what does the fossil trace golf course in golden, colorado, have to do with mineral resources?
Fossil trace golf course is a prehistoric club with a massive remnants of clay mining equipment can be seen throughout the layout designed by renowned architect Jim Engh.
what is fossil trace golf course?A club with ancient history and remnants of clay mining equipment.
Each piece is of rich history of the property and save the memories of many award winning golf players.
It was established in July 2003 in the Colorado City of Golden which was actually opened 64-million years
Fossil Trace Golf Club is widely called as one of Denver’s top golf course.
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Account for the decrease in the oxygen content in the exhaled air
Answer:
Because the air inhaled is used up by our body cells for respiration.. Therefore exhaled air contains less oxygen than inhaled air because it has more of carbon dioxide which is one of the by products of respiration...
Explanation:
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Organisms that live in the chaparral have developed unique adaptations that aid in their survival. the california quail is a small, plump game bird with short wings that can be found in the chaparral regions of california. these birds can only fly short distances, and typically take cover in shrubs or other low-growing plants. they are active in the morning and at night. bird with dark feathers and white stripe on its head. photo by dcrjsr how is the california quail adapted to live in the chaparral biome? a. tree-dwelling b. crepuscular activity c. nesting in trees d. moisture-rich diet please select the best answer from the choices provided a b c d
Crepuscular activity
Crepuscular refers to animals and birds that are active at night, during twilight. So, these little birds don't usually travel large distances during the day, first of all, because they can't due to their small wings and plump bodies, and second of all, in order to avoid getting eating by a larger bird or animal. So they are usually nocturnal birds that live during the night.
What are some of the adaptations that help chaparral plant survive in dry conditions ?Chaparral is a hot, dry, and flammable biome. Chaparral-specific plant adaptations are necessary for their survival. These adaptations may include the capacity for water absorption through the leaves, broad taproots to access deep water reservoirs, and bark that is fire-resistant.
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Answer:
the answer is B
Explanation:
edge 2023
A 3-year-old child becomes nervous as he runs screaming into his parents’ room. What might the boy’s mother, a neurologist, notice about the child?
The boy's mother, a neurologist noticed sympathetic activation of the radial muscles of the iris dilated the child's pupil.
In humans, the dilator muscles of the iris contains fibers that extend radially through the iris of the eye and involuntarily contract as available light decreases, thus dilating the pupil.
Pupillary dilation is controlled primarily by the sympathetic nervous system and interruption of the innervation of the dilator muscle can cause an abnormally small pupil, a condition seen as part of Horner syndrome.
Pupillary dilator increases the size of the pupil to allow more light to enter the eyes. It works in opposition to the pupillary constrictor. The pupil dilation occurs when there is an insufficient light for the normal functioning of eyes or during heightened sympathetic activity, for example during fear .
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Which of the following choices correctly describes the
way energy flows in an ecosystem?
A. Primary Consumer to Decomposer to Secondary Consumer
to Producer to Tertiary Consumer
B. Primary Consumer to Secondary Consumer to Producer to Decomposer to Tertiary Consumer
C. Decomposer to Producer to Tertiary Consumer to Secondary
Corumer to Primary Consumer
D. Producer to primary consumer to secondary consumer to tertiary consumer to decomposer
Ketone bodies are produced from the incomplete breakdown of _____ when _____ is unavailable for the brain and nerve cells.
Ketone bodies are produced from the incomplete breakdown of fats when glucose is unavailable for the brain and nerve cells.
Ketone bodies are the substances which are produced by the liver during gluconeogenesis. Gluconeogenesis involves formation of glucose during fasting and starvation. The three ketone bodies produced by the liver include acetoacetate, beta-hydroxybutyrate, and acetone.
These compounds are utilized in healthy individuals to provide energy to the cells of the body when glucose is low or absent in the diet.
During fasting or starvation, the glucose levels in the blood quickly decrease which stimulates the body to enter the post-absorptive state. In this state, the body starts converting fat back into fatty acids, glycogen into glucose, and even starts breaking down amino acids for energy.
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Considering pnpp → pnp reaction, would you expect to see more intense or pale color for the reaction that contain the inhibitor? explain
We would not expect see the pale color in presence of inhibitor in PNPP-PNP reaction. PNPP ( P- nitrophenylphosphate) is chromogenic substance for alkaline phosphate , which is clear yellow color. PNP (P- nitro-phenol ) is a colorless and acidic solution.
PNP is stronger acid and it is used as a manufacture drugs, fungicies, insecticides and dyes . Over inhalation of 4-nitro-phenol can causes headache, drowsiness , nausea, and cyanosis.
PNPP is used for detecting alkaline phosphate in ELISA applications. It sis non proteinaceous non -specific substance used to assay protein , alkaline and acid phosphates. And its yellow color is because of maximum of absorbance at 405 nm.
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The ________ of a mole should not be irregular, nor should it blur into nearby normal tissue.
The border of a mole should not be irregular, nor should it blur into nearby normal tissue.
What is a mole?A mole is a benign growth on the skin caused due to the clustering of melanocytes.It is a non cancerous growth of pigment producing skin cells (melanocytes).The melanocytes provide color to the skin and eyes as they secrete a substance called melanin.Mostly the moles are round, harmless but always note for changes like change in size, shape, texture of the mole as it may be an indication of melanoma (skin cancer) which require removal of the mole.A mole is usually dark in color and arises from the skin.A mole is also known as beauty mark, birth mark or nevus.Some moles are present at birth while others develop over time (acquired).Learn more about moles here:
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What is the term for a somewhat independent part of the body that performs a specific function?
An independent part of the body that performs a specific function.
What is organ?An organ is a group of tissues together to form a structural unit in biology that has a single purpose.An organ sits between a tissue and an organ system in the hierarchy of life. Similar cell types come together to form tissues that perform a certain purpose.An organ is made up of a variety of tissues that work together to provide a certain function. For instance, the intestinal wall is made of both smooth muscle and epithelial tissue. An organ system, also known as a biological system or body system, is made up of two or more organs that cooperate to carry out a certain physiological function.The abdominal organs can be categorised as hollow or solid. The liver, pancreas, spleen, kidneys, and adrenal glands are the solid organs. The rectum, gallbladder, bladder, stomach, and intestines are among the hollow organs of the abdomen. A muscular, hollow organ, the heart is located in the thoracic cavity.Learn more about organ here
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Three of the six greenhouse gases that are regulated by the epa are halogens, which are greenhouse gases that are ___ co2.
Three of the six greenhouse gases that are regulated by the epa are halogens, which are greenhouse gases that are methane CFCs and co2.
A structure with a glass roof and walls is known as a greenhouse. Tropical flowers and tomatoes are among the plants that are grown in greenhouses. Even in the winter, a greenhouse keeps a comfortable temperature inside. Sunlight enters the greenhouse during the day and heats the air and plants within
. Carbon dioxide, methane, nitrous oxide, hydrochlorofluorocarbons (HCFCs), hydrofluorocarbons (HFCs), and ozone in the lower atmosphere are the principal greenhouse gases whose concentrations are rising. Different processes, over time, remove greenhouse gases from the atmosphere according to their various chemical characteristics.
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What is the name for a cell or cell part that detects signals from the environment
Answer:
Receptors
Explanation:
Receptors play a key role in cell signaling as they are able to detect chemical signals or physical stimuli. Receptors are generally proteins located on the cell surface or within the interior of the cell such as the cytoplasm, organelles, and nucleus.
When we want to get a bacterium to make a chemical normally made by a human, we take the gene from the human and put it into the bacterium by using?
When we want to get a bacterium to make a chemical normally made by a human, we take the gene from the human and put it into the bacterium by using a bacterial enzyme known as DNA ligase
What is are bacteria?Bacterial are microscopic unicellular organisms which are made of prokaryotic cells. They reproduce asexually.
Some bacteria which are saprophytes; organisms which feed on dead and decaying organisms while some bacteria are parasites.
So therefore, when we want to get a bacterium to make a chemical normally made by a human, we take the gene from the human and put it into the bacterium by using a bacterial enzyme known as DNA ligase
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The density of cristae is higher in mitochondria of the cell with higher rates of?
The density of cristae is higher in the mitochondria of the cell with higher rates of respiration.
The folds found inside the inner mitochondrial membrane are called mitochondrial cristae.
These folds provide a larger surface area where chemical processes, like redox reactions, can occur.
Due to the fact that the ETC enzymes are encased in the inner mitochondrial membrane, an increase in surface area through the production of many cristae may result in higher rates of respiration.
The inner membrane is folded into cristae to boost the mitochondrion's ability to produce ATP.
These folds enable the mitochondrion to contain many more ATP synthase and electron transport chain enzymes.
Hence, the density of cristae is higher in the mitochondria of the cell with higher rates of respiration.
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The __________ of the medulla oblongata send(s) sympathetic signals to arteriolar smooth muscle, helping to maintain peripheral resistance.
The baroreceptors of the medulla oblongata send(s) sympathetic signals to arteriolar smooth muscle, helping to maintain peripheral resistance
What is the medulla oblongata?The medulla oblongata is that part of the brain which controls involuntary actions.
Involuntary actions are actions we can't control.
Some common examples of involuntary actions are:
SneezingSweatingCoughingBlinking of the eyesPeristalsisConstriction and dilation of the blood vesselsSo therefore, the baroreceptors of the medulla oblongata send(s) sympathetic signals to arteriolar smooth muscle, helping to maintain peripheral resistance
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The energy required to drive the synthesis of the majority of the atp generated during aerobic respiration comes most directly from?
The energy required to drive the synthesis of the majority of the ATP generated during aerobic respiration comes most directly from: the flow of protons through an ATP synthase complex.
What happens during aerobic respiration?It is a process of cellular respiration occurring in the presence of oxygen to generate ATP (energy) from food.It is the most common type of respiration in plants and animals including humans, generating water, CO2 and energy as end products.The 3 stages of aerobic respiration are: glycolysis, Krebs cycle and oxidative phosphorylation.Glycolysis is an anaerobic process.During oxidative phosphorylation, the hydrogen ions combine with oxygen to form water and at the same time the electrons pass along an electron transfer chain and their energy is utilized to form ATP molecules.In aerobic respiration, 38ATP molecules are formed by the oxidation of one molecule of glucose.Learn more about aerobic respiration here:
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Failure to launch refers to a syndrome wherein some children fail to leave home by age _____.
Failure to launch refers to a syndrome wherein some children fail to leave home by age by the age of 30.
What is Failure to Launch Syndrome?Failure to Launch syndrome refers to the inability of young adults to become self-sufficient and taking on adult responsibilities.
Failure to Launch is usually determined by the Age of 30. This limits a persons participation in life because such an individual may be unable to do things or survive alone.
There are a lot of factors that may be responsible for failure to launch. some of these factors may emanate from the child's physical and social environment.
Some other factors that may lead to failure to launch include;
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