Answer:
they studied at various characteristics of the genes
what are facial muscles
The facial muscles are a group of about 20 flat skeletal muscles Originating mainly from the bones of the skull and inserting onto the skin Of the face, which produce facial expressions.
The facial muscles, also called craniofacial muscles or mimetic muscles. These are positioned around facial openings (mouth, eye, nose and ear) or stretch across the skull and neck. Thus, these muscles are categorized Into several groups;
Muscles of the mouth (buccolabial group)
Muscles of the nose (nasal group)
Muscles of the cranium and neck (epicranial group)
Muscles of the external ear (auricular group)
Muscles of the eyelid (orbital group)
All of the facial muscles are innervated by the facial nerve (CN VII) and Vascularized by the facial artery.
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genetic drift definition
Genetic drift will refers to the random fluctuations in the frequency of the alleles (different forms of a gene) in a population over time, due to chance events.
These fluctuations can result in the loss of some alleles as well as the fixation of the others, which can lead to changes in the genetic makeup of the population.
Genetic drift is a stochastic process and can have a greater effect on the small populations, where chance events can have a more significant impact. It is one of the mechanisms of evolution and can contribute to the divergence of populations over time.
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When several EPSPs arrive at the axon hillock from different dendritic locations, depolarizing the postsynaptic cell to threshold for an action potential, this is an example ofA) temporal summation. B) spatial summation.C) tetanus.D) the refractory state.E) an action potential with an abnormally high peak of depolarization.
Option B).Spatial summation is the process by which several EPSPs arrive at the axon hillock from different dendritic locations, depolarizing the postsynaptic cell to threshold for an action potential.
In this process, the effects of different synapses are added together based on their spatial location on the b, leading to the initiation of an action potential.Temporal summation (A) is the process by which EPSPs generated at the same synapse arrive in rapid succession, leading to the initiation of an action potential. Tetanus (C) is a sustained contraction of a muscle caused by a rapid series of action potentials in the motor neurons. The refractory state (D) refers to a period of time after the initiation of an action potential during which the neuron is less responsive to additional stimuli. An action potential with an abnormally high peak of depolarization (E) is not a recognized physiological process.The axon hillock is the region of a neuron where action potentials are generated. EPSPs (excitatory postsynaptic potentials) are graded potentials that result from the binding of neurotransmitters to receptors on the postsynaptic neuron. When several EPSPs arrive at the axon hillock from different dendritic locations, they can summate, or add together, to reach the threshold for an action potential. Spatial summation is the process by which the effects of different synapses are added together based on their spatial location on the neuron. EPSPs that occur closer to the axon hillock will have a greater effect on the neuron's membrane potential than EPSPs that occur further away. If the combined effect of the EPSPs exceeds the threshold for an action potential, an action potential will be initiated and propagated down the axon.
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guard cells straighten our when water pressure
Guard cells help to maintain homeostasis. The guard cells straighten out when water pressure decrease.
Guard cells are the plant cells in the epidermis of leaves and other organs are used to control gas exchange.
The shape of the protective cells changes due to the change in the amount of water in them. Guard cells work of regulating the opening and closing of the stomata.As water flows into the guard cells, it swells and causes the stomata to open.Stomata are the primary control mechanism plants use to reduce water loss, and they are able to do so quickly. During photosynthesis it allowed the movement of CO₂ and released O₂ in the atmosphere. The closure of stomata during the night prevents water loss through pores. When the guard cells lose water, they shrink and sag and straighten, causing the stomata to close. The protective cells straighten when the water pressure drops.
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Complete question :
Guard cells straighten out when water pressure __________.
Notice that when comparing our amino acid sequence to a fruit fly, we have a difference of 29 amino acids. That number jumps drastically when we compare ours to the thesis monkey, which has difference of 1. Why does this make sense?
Proteins are made up of compounds called amino acids. Proteins and amino acids are the components of living.
What names do proteins and amino acids go by?
Peptides, which are smaller subunits composed of carbon, hydrogen, oxygen, and other compounds, are what are known as amino acids. Proteins, also known as polypeptides, are connected chains of amino acids that can contain tens of thousands of amino acids each.
Amino acids are the byproducts of the digestion or breakdown of proteins. A protein is made up of a long sequence of amino acids that are connected by peptide bonds. In a biological process, the amino group of one amino acid is joined to the carboxyl group of a nearby amino acid, extracting a water molecule in the process.
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where is the prostate
The prostate is a gland that is part of the male reproductive system. It is located just below the bladder and in front of the rectum, and surrounds the urethra, which is the tube that carries urine and semen out of the body.
The prostate is roughly the size and shape of a walnut and consists of both glandular and muscular tissue. Its main function is to produce and secrete a milky fluid that forms part of semen, which helps to nourish and protect sperm as they travel through the female reproductive system.The prostate is regulated by male hormones, particularly testosterone, and can be affected by various conditions, such as prostatitis, benign prostatic hyperplasia (BPH), and prostate cancer. Digital rectal exam (DRE) and prostate-specific antigen (PSA) blood test are two common methods used to screen for prostate cancer.
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Rna was probably the first molecule used to encode genetic information; the use of dna came later. this is due to rna's inherent stability and its ability to store information more accurately than dna. (T/F)
This statement is False. RNA is generally less stable than DNA and more prone to spontaneous hydrolysis due to the presence of the 2'-OH group in its ribose sugar.
This can make RNA more susceptible to degradation and limit its ability to store genetic information over long periods of time.
In contrast, DNA is more stable than RNA due to the absence of the 2'-OH group in its deoxyribose sugar, which makes it less susceptible to hydrolysis. Additionally, the double-stranded nature of DNA provides a mechanism for error correction during DNA replication, which can increase the accuracy of genetic information storage over long periods of time.
Thus, DNA is generally considered to be a more stable and accurate molecule for long-term storage of genetic information, and it is thought to have replaced RNA as the primary genetic material during the evolution of life on Earth.
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what is the autosomal recessive pedigree
When a kid receives one copy of a mutant (changed) gene from each parent, autosomal recessive inheritance may develop. in order to convey a genetic disease or characteristic from the parent to the kid.
When a characteristic or ailment is brought on by a recessive gene found on an autosome, a genetic family tree known as an autosomal recessive pedigree can be used to demonstrate how it is inherited (one of the non-sex chromosomes).
The feature or condition in an autosomal recessive pedigree often only manifests in those who have two copies of the defective gene (one inherited from each parent). Carriers are people who only have one copy of the mutant gene.
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Which of the statements is a simplified equation for cellular respiration?A. glucose + oxygen → carbon dioxide + waterB. lipid + water → fatty acids + carbon dioxideC. carbon dioxide + water + light → glucose + oxygenD. glucose + nitrogen → carbon monoxide + water
The statement that represents a simplified equation for cellular respiration is option A.
glucose + oxygen → carbon dioxide + water.
Cellular respiration is a metabolic process that occurs in cells to release energy from glucose, which is then used by the cell for various activities. The simplified equation for cellular respiration is represented by the formula A, where glucose and oxygen are the reactants and carbon dioxide and water are the products.
This process occurs in three main stages: glycolysis, the Krebs cycle, and the electron transport chain. The energy released during cellular respiration is used to generate ATP molecules, which provide energy to the cell. Cellular respiration is a vital process for the survival of most organisms and is necessary for the maintenance of the metabolic processes of the cell.
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Complete Question:
Which of the statements is a simplified equation for cellular respiration?
A. glucose + oxygen → carbon dioxide + water
B. lipid + water → fatty acids + carbon dioxide
C. carbon dioxide + water + light → glucose + oxygen
D. glucose + nitrogen → carbon monoxide + water
The dorsal pigment pattern of frogs can be either "leopard" or "mottled." The trait is controlled by an autosomal gene. Males and females are selected from pure-breeding populations and a pair of reciprocal crosses is performed. The cross results are shown: Cross 1: P: male leopard x female mottled F1: all mottled F2: 70 mottled, 22 leopard
Cross 2: P male mottled x female leopard F1: all mottled F2: 50 mottled x 18 leopard
compare and contrast the results of the reciprocal crosses in the context of autosomal gene inheritance.
The results of the reciprocal crosses suggest that the "leopard" and "mottled" dorsal pigment patterns in frogs are likely controlled by a single autosomal gene with incomplete dominance.
In Cross 1, the male parent with the "leopard" trait was crossed with a female parent with the "mottled" trait. The F1 offspring all exhibited the "mottled" trait, suggesting that the "mottled" trait is dominant over the "leopard" trait.
In the F2 generation, there were 70 individuals with the "mottled" trait and 22 individuals with the "leopard" trait, consistent with a ratio of approximately 3:1, which is expected for a single autosomal gene with incomplete dominance.
In Cross 2, the male parent with the "mottled" trait was crossed with a female parent with the "leopard" trait. The F1 offspring all exhibited the "mottled" trait again, suggesting that the "mottled" trait is dominant over the "leopard" trait.
However, the ratio of "mottled" to "leopard" individuals in the F2 generation was different, with only 50 individuals with the "mottled" trait and 18 individuals with the "leopard" trait. This difference in the F2 ratio between the two crosses could be due to a variety of factors, such as random chance, genetic background, or environmental influences.
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how many carbon atoms are in each rubp molecule
Answer:
5 carbon atoms
RuBP has 5 carbon atoms.
Explanation:
systematists have used a wide variety of traits to reconstruct the phylogenies of particular groups of organisms. which one of the following traits produces a good estimate of phylogeny?
All traits which produces good estimate of phylogeny are Gross Morphological Traits, Molecular Traits, Biochemical Traits, Behavioral Traits.
The biologists known as systematists created a system for classifying and naming creatures.
The collective structures of an organism were described in this regard by gross morphological features. It made reference to every structure, both internal and exterior.
An organism's genetic variability was described by its biochemical and molecular features. In this instance, they argued that the trait in question is a crucial aspect of the organism.
The behavioral characteristics defined a few activities that were specifically identified to be unique to a certain kind of organism.
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which field of biology is also an interdisciplinary science in its own right
Neurobiology field of biology is also an interdisciplinary science in its own right.
Neurobiology is a scientific subject that studies the nerve system and brain function. Neurobiology research findings improve both neuroscience and physiology. The central and peripheral nervous systems are both part of the vertebrate nervous system.
Why do we research neurobiology?The study of the nervous system enhances our understanding of our basic biology and how our bodies function. Understanding how things work in general might help throw light on what might happen when there are issues. It can assist researchers in discovering strategies to prevent or treat disorders affecting the brain, neurological system, and body.
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which structures would be found in a bacterium, but not in a human cell?
Bacteria lack a membrane-enclosed nucleus, in contrast to eukaryotic (true) cells. A area of the cell known as the nucleoid is where the chromosome, a single continuous strand of DNA, is localized but not confined.
The presence of peptidoglycan, which is situated directly outside of the cell membrane, distinguishes the bacterial cell wall from that of all other organisms. An equal number of N-acetylglucosamine (NAG) and N-acetylmuramic acid (NAM) residues alternate in the polysaccharide backbone that makes up peptididoglycan.
Many eukaryotic cell structures are absent from bacteria. They lack a nucleus, for instance. They also lack organelles that are attached to membranes, such chloroplasts and mitochondria. Bacterial cells have DNA that is distinct from eukaryotic cells.
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Correct Question:
What type of structures would be found in a bacterium, but not in a human cell?
How does gas exchange occur in plants?
Answer:
Diffusion via stomata
Explanation:
Gaseous exchange occurs through it
a locus encodes different genes in different individuals of the same species.truefalse
The sex of all is not entirely set in stone by chromosomes. If you somehow ensued to look at a run-of-the-mill public at a solitary locus, you would track down more copies of the wild-type allele than some other allele.
Locus is a term that we use to let us know where on a chromosome a particular quality is. So it's actually the actual area of quality on a chromosome. It's an approach to characterizing the quality area.
Every chromosome conveys numerous qualities, with every quality possessing an alternate position or locus; in people, the all-out number of protein-coding qualities in a total haploid arrangement of 23 chromosomes is assessed at 19,000-20,000.
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The stripes in skeletal muscle are due to the presence of Multiple Choice a. multiple nuclei per cell. b. actin and myosin filaments intercalated disks. c. the branching of cells, d. tendons connecting the muscle to bone.
The stripes in skeletal muscle are due to the presence of actin and myosin filaments intercalated disks. Therefore, the correct option is B.
What are skeletal muscles?Skeletal muscles are the voluntary muscles of the body that helps the body to move and provides support to the body. They are typically attached by the tendons to the bones of the skeletal system.
The skeletal muscle fibers have stripes which are called striations, which are formed due to the myofibrils. The basic unit of striated (striped) muscle is a sarcomere comprised of actin (light bands) and myosin (dark bands) filaments. Therefore, the correct option is B.
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Which is not part of the conducting portion of the respiratory system?
A. Alveoli
B. Trachea
C. Larynx
D. Nasal cavity
E. Bronchi
The conducting section of the respiratory system does not include alveoli.
What does the term "respiratory system" mean?The respiratory system is a biological system found in both plants and animals that is made up of certain organs and structures used for gas exchange. The anatomy and physiology that contribute to this vary considerably depending on the size of the creature, its habitat of habitation, and its evolutionary history.
The respiratory system is what?Your lungs, airways, and blood arteries are part of it. The respiratory system also includes the muscles that move your lungs. Together, these elements aid in the body's oxygen circulation and waste gas elimination.
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Which groups consist of parasitic flagellated cells, such as trypanosoma, the organism that causes sleeping sickness?
Trypanosoma is a genus of kinetoplastids and belons to phylum Euglenozoa.
In general , Euglenozoa are the group of unicellular organisms those are known by the presence of flagella and a single nucleus. This phylum includes large variety of organisms, some of them survive in free-living state while others are parasite.
Hence , the parasitic members of Euglenozoa comprises of Trypanosoma brucei, that is responsible for causing African trypanosomiasis or sleeping sickness in humans and animals, also the Leishmania species, which cause leishmaniasis, is a disease that impact on skin and many internal organs.
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the clear fluid found in whole blood in which the cells are suspended is called
The clear fluid found in whole blood in which the cells are suspended is called plasma however, when the clotting factors are removed, it is now called serum.
Plasma is the frequently forgotten part of blood. White blood cells, red blood cells, and platelets are essential to body characteristics. However, plasma also plays a key function. This fluid consists of the blood components during the frame.
The serum consists of all proteins not utilized in blood clotting; all electrolytes, antibodies, antigens, hormones; and any exogenous substances (e.g., capsules or microorganisms).
Serum does now not incorporate white blood cells (leukocytes), red blood cells (erythrocytes), platelets, or clotting elements.
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Full Question: The clear fluid found in whole blood in which the cells are suspended is called ______; however, when the clotting factors are removed, it is now called ______.
what is meant by the ""universality of the genetic code""?
Genetic codes can be used in every living system, in any kind of environment, at any period due to their universality, which makes them omnipresent.
Examples include the fact that the identical amino acid, methionine, is coded for by the triplet code AUG in both bacteria and humans. The code's universality is most likely the product of a frozen accident, or the negative effects of codon reassignment in the SGC, along with the deterrent effects of code modifications on horizontal gene transfer. Due to the nonrandom nature of the SGC structure, the code is highly resilient to errors in translation and mutation. The extension of the primordial code, which was prompted by the diversification of the repertory of protein amino acids, most likely resulted in this mistake minimization as a byproduct.
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what part of the nucleotide determines the genetic code to build a protein?
The sequence of nitrogenous bases within the nucleotide determines the genetic code to build a protein.
Specifically, the sequence of the four different nitrogenous bases - adenine (A), thymine (T), guanine (G), and cytosine (C) - in a DNA nucleotide determines the sequence of amino acids in a protein. Each amino acid is specified by a codon, which is a three-nucleotide sequence in the DNA.
The order of the codons in the DNA determines the order in which the amino acids are assembled during protein synthesis. Therefore, the sequence of the nitrogenous bases within the nucleotides plays a critical role in determining the genetic code for building a protein.
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which proposed representational system is the least likely to be in place in the human visual system? a. specificity coding b. distributed coding c. representation by a small number of neurons d. sparse coding
The proposed visual system is indeed the percent less likely to be used by the human eyes because of its specificity coding.
What does the human eyes have specific training for?Detecting all electromagnetic energy what surrounds us is the process of seeing. Humans can only see a small portion of the electromagnetic spectrum. Shape, color, velocity, and depth are all sensed either by visual photoreceptors on the retina.
Where is a significant portion of the visual data handled in this place?ocular cortex Here, processing of the images coming from your retina starts. The visual cortex, which has six layers, is the first part of your brain to analyze and recognize what it sees. These layers also handle form, color, and motion as well as depth perception.
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Please help me fast ………
Answer: B
Explanation:
ecosystem is the level of organization that is best described as including:_____.
The organism, population, community, ecosystem, and biosphere are examples of ecological organizational levels.
An ecosystem is made up of all the biotic and abiotic components of the environment that are present in a given area.
The term "ecosystem" refers to the level of structure that encompasses different species in a region and the abiotic elements on which they depend. which is designated as choice D.
The non-living components of the surroundings that impact how organisms and eco - systems function are referred to as this.
The correct answer is option D because an ecosystem consists of all the organisms that fall under beneficial microorganisms and the physical environment (abiotic factors) that they interact with in order to survive.
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Complete Queation -
Ecosystem is the level of organization that is best described as including -
A. only a single individual of a single species plant or animal.
B. all of the abiotic factors which characterize a geographic area.
C. two species that live in the same habitat and depend on each other.
D. various species in an area and the abiotic factors on which they depend.
In the 1940s, proteins were thought to be the more likely molecules to house genetic information. What was the primary reason that DNA was not originally believed to be the genetic material?
(a) DNA has a high density of negative charges.
(b) Nucleotides were known to be a source of chemical energy for the cell.
(c) Both protein and nucleic acids were found to be components of chromosomes.
(d) DNA was found to contain only four different chemical building blocks.
The primary reason that DNA was not originally believed to be the genetic Material in the 1940s was option (d) - DNA was found to contain only four Different chemical building blocks.
At the time, scientists believed that genetic material must be very Complex, and since proteins have a much greater variety of building Blocks (amino acids), they were considered more likely to be the genetic Material.
It was not until later, when the structure of DNA was elucidated and its Role In genetic information storage and transfer was fully understood, That DNA Was recognized as the primary genetic material.
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how does the brain control anxiety
Answer:
The brain's limbic system, comprised of the hippocampus, amygdala, hypothalamus and thalamus, is responsible for the majority of emotional processing.
Explanation:
What are the 3 types of carbohydrates?
Answer: Sugar, starch, and fiber
Explanation: Sugars. They are also called simple carbohydrates because they are in the most basic form. ... Starches. They are complex carbohydrates, which are made of lots of simple sugars strung together. ... Fiber. It is also a complex carbohydrate.
Fibrocartilage is distinguished from other types of cartilage by the following characteristic. (A) collagen fibers predominate (B) it contains no blood vessels or nerves (C) it contains osteoclasts (D) it maintains the shape of a structure while allowing great flexibility (E) chondroblasts secrete matrix
Would you want to visit a genetic counselor to determine if you or your future child had a genetic disorder? Why or why not?
Answer:
help you better understand your test results and treatment options, help you deal with emotional concerns, and refer you to other healthcare providers and advocacy and support groups.
Explanation:
