A group of snakes that is unable to cross a river and is separated from a group of snakes on the opposite side is an example of the geographic isolation process (Option B).
What is the geographic isolation process?The geographic isolation process refers to all types of geographic barriers such as rivers that limit the gene flow between individuals of the same species.
Therefore, with this data, we can see that the geographic isolation process is associated with a limited gene flow in a population due to geographic barriers between individuals.
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Simlies in science can you help compare theses word with things that are like it and does the same things outside the body???
Every action and movement your body performs is coordinated by the human neurological system.
What are the regulation by all system in the body?More specifically, homeostasis refers to the body's propensity to keep internal conditions like blood sugar and temperature at essentially constant and stable levels.
The receptor, which receives signals and responds to stimuli, the effector, and these three components together make up the regulatory system.
Therefore, The control center originates the signal, and the effector is responsible for transmitting the signals that are relayed from it.
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Explain how the prairie is different now from how it was in the past.
Answer:
something
Explanation:
Explain how the geological events (earthquakes and volcanoes) affect the quality of life of the people living in all three states (California, Georgia, and Hawaii)
The geological events taking place in these states makes a huge impact over the lives of the residents. The life of such people is under risk factors always.
What are the preventive measures to such activities ?The residents living away from most hazardous sites, various safety measures that are needed to take place at the time of any happening.
People living in such areas are under risks always, loss in mental peace, loss of properties, loss of financial statures as well.
Thus, it is always wiser to take important steps in order to avoid such mishaps.
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With a greater understanding of the neurobiology of behavior and the role of physiology in behavioral expression, explain how this knowledge is important for understanding the variations of behavior in both humans and non-human animals. How is this important for understanding differences in behavioral expressions between species?
Neurobiology is scientifically studying how our nervous system and brain function, and its related structures such as the spine.
The field of neurobiology of behavior investigates how neurology influences behavior. The frontal lobe is linked to personality, judgment, problem-solving, abstract thought, attention, and other behaviors. Additionally, neurotransmitters are in charge of igniting, inhibiting, and modifying neurons that further influence human behavior. The study of physiology focuses on the origins of significant bodily functions, including hunger, behavioral potentials, innate drives, and many other situations that influence our behavior. The brain is where a living thing's genes and environment converge, or where nature and nurture interact. That is how the environment in our brain and our genes interact. Our environment has the potential to impact our genetically predetermined biochemistry and brain circuitry.
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A person weighing 200 N on an elevator the elevator lifts the person 6 m in 8 seconds how much power was used
The power used is 150 W.
Power is defined as the amount of work done per unit time or the transfer of energy.
For the calculation of power, formulae are
[tex]P = \frac{W}{t}[/tex]
[tex]PE = mgh[/tex]
where
P = Power in Watts (W) or Joules/sec (J/s) or N.m/s
W = Work in Joules (J) or Newton-meter (N.m)
t = time in seconds (s)
PE = gravitational potential energy in Joules (J) or Newton-meter (N.m)
m = mass in kilogram (kg)
h = height in metres (m)
Given:
w = 200 N
h = 6 m
t = 8 s
Calculation:
PE = 200×6
PE = 1200 J
P = W/t
P = 1200J/8s
P = 150 Watts
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In which type of cell do both DNA replication and cellular respiration take place in the cytosol?
- Animal cell
-Fungal cell
-Plant cell
-Bacterial cell
Both DNA replication and cellular respiration take place in the cytosol of a Bacterial cell.
What is a bacterial cell?
Small, single-celled organisms called bacteria exist. Nearly all areas of the world are home to bacteria, which are essential to its ecosystems. Some species can survive in environments with high pressure and temperatures. In fact, it's thought that there are more bacterial cells in the human body than there are human cells. Bacterial cells don't have a nuclear membrane therefore both DNA replication and cellular respiration take place in the cytosol. Hence, bacterial cells do both.
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Why is water considered a good insulator?
Answer:
Water is a good insulator
Explanation:
This is because water is very healthy for our body making us not dehydrate
______Cannot control heat loss from the body
Adipose tissue cannot control heat loss from the body
Adipose tissue is present beneath the skin which protect the skin from heat loss and it will act as a cushion to the skin when an external pressure applied and adipose tissue act as insulating material and prevent excessive loss of heat in severe cold and there are four way the body loses heat and they are evaporation , convection, conduction, and radiation in evaporation body heat turns sweat vapor and in convection heat loses by air or water moving across the skin surfaces and conduction means direct contact with an object and radiation means the body radiates like a fire you can feel heat without being inside the fire
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Which of the following DNA analysis techniques requires the most steps to complete?
STR profiling
SNP analysis
Y-STR analysis
DNA fingerprinting
The DNA analysis technique that requires the most steps to complete is DNA fingerprinting (Option D) The DNA fingerprinting takes 8 steps to complete.
What is DNA fingerprinting?DNA fingerprinting is a technique for identifying an individual from a DNA sample by examining distinctive patterns in their DNA.
The steps involved in DNA fingerprinting are as follows: The DNA is being isolated. The DNA is digested using restriction endonuclease enzymes. Electrophoresis is used to separate digested fragments based on fragment size.
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25. WHICH OF THE FOLLOWING IS FALSE ABOUT FATTY ACIDS?
a)Melting point of fatty acids decreases with increase in degree of saturation
b) Lipids in tissues that are subjected to cooling are more unsaturated
require organic solvents
LOPURAM
C)Naturally occurring unsaturated long-chain fatty acids are nearly Trans-configur
d) The membrane lipids contain mostly unsaturated fatty acids
Saturated fatty acids press in on one another when temperatures drop, creating a dense, rather hard membrane. Thus, option B is correct.
What are the important properties of fatty acids?In weakly or non-polar organic solvents like ether, chloroform, benzene, and acetone, all lipids are insoluble; however, polar organic solvents like water are very soluble.
In fact, the terms “lipid-solvents” and “fat-solvents” are frequently used to describe these four solvents.
Therefore, Unsaturated fatty acids can preserve membrane fluidity by being compressed, which causes the “kinks” in their tails to push apart nearby phospholipid molecules.
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Which of these is a source of food for plants?
A.
proteins found in animal tissues
B.
minerals dissolved in the soil
C.
water that falls from the atmosphere
D.
sugars made during photosynthesis
Answer:the answer is A
Explanation:
A geologist is studying some ancient igneous rocks. She uses the unstable element Uranium 235 to date the material. The half-life of this element is 704 million years. If she finds parent isotope to daughter isotope ratio in the amount 12.5% parent to 87.5% daughter, about how old will the sample be?
The age of the sample from the half life is 2.1 * 10^9 years.
What is the age of the sample?We know that when radioactivity is taking place, the parent nucleus would disintegrate and the daughter nucleus is formed. We can know the amount of the parent and daughter isotope as it is in the question.
We mow need to find the age of the sample from;
N/No = (1/2)^t/[tex]t_{\frac{1}{2} }[/tex]
N = Number of atoms that remain after time t
No = Number of atoms originally present
t = age of the sample
[tex]t_{\frac{1}{2} }[/tex] = Half life of the sample.
To obtain the age of the sample;
0.125No/No = (1/2)^t/704 * 10^6
0.125 = (1/2)^t/704 * 10^6
(0.5)^3 = (0.5)^t/704 * 10^6
3 = t/704 * 10^6
t = 3 * 704 * 10^6
t = 2.1 * 10^9 years
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(30-50 words) Is the sickle cell allele dominant or recessive? Explain. What is sickle cell trait?
Speed can be determined by dividing the distance by the Displacement Time Velocity Density
The speed of a moving object can be determined by dividing the distance traveled by the time taken. The second option.
What is speed?Speed is the property of a moving body that is obtained by finding the ratio of the distance covered by the body and the time taken to cover the distance.
The speed of a moving object can be expressed mathematically as:
Speed = distance/time.
The SI unit of distance is meter while the SI unit of time is seconds. Thus, the unit of speed is meter per seconds, usually denoted as m/s. However, any other unit that is a derivative of meter per second can be used to qualify the speed of an object.
The speed of an object is a scalar quantity because it measures magnitude only. This is unlike vector quatities that has both magniture and direction.
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Explain cellular respiration
Answer:
cellular respiration, the process by which organisms combine oxygen with foodstuff molecules, diverting the chemical energy in these substances into life-sustaining activities and discarding, as waste products, carbon dioxide and water.
Can humans ever directly see a photon?
Answer:
yes! Human eyes are specifically designed to detect light
Explanation:
genotypes and phenotypes
Answer:
A person's genotype is their unique sequence of DNA. More specifically, this term is used to refer to the two alleles a person has inherited for a particular gene. Phenotype is the detectable expression of this genotype – a patient's clinical presentation.
Explanation:
As a result of an action potential, AcH is released from the axon terminal and attaches to receptors on the motor end plate. Sodium rushes in the T-tubules and all the steps occur until the muscle contracts in the leg and carry out the command transported by the motor neuron. Which gray horn is the cell body of the motor neuron located? Infer and explain if this is a positive or negative feedback
1) The cell body of the motor neuron is located in the ventral or anterior horn of the grey matter. From there, it extends to the motor unit. 2) Contraction refers to negative feedback in which the body reacts when facing a stimulus.
What is the anatomy of the spinal cord?The spinal cord is mainly composed of grey matter and white matter. The second one covers the first one.
The grey matter transversal section is composed of posterior, lateral, and anterior horns, also known as dorsal, lateral, and ventral horns, respectively.
Each type of horn contains a type of neuron.
In the posterior/dorsal horns, we can find sensory neurons that provide sensory information.In the thoracic area, we can find lateral horns with visceral motor neurons.
In the anterior/ventral horns, we can find motor neurons that extend to the skeletal muscle, which is the motor unit, to produce movement.
The motor neuron from the exposed example is located in the anterior or ventral gray horn.
This example refers to negative feedback because the neurotransmitter release causes a cascade effect that ends in muscle contraction, tending to suppress or counter the original stimuli.
Any change that might occur in the internal functioning will be countered by negative feedback to maintain homeostasis.
Negative feedback needs receptors, central control, and effectors.
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What passes through the
electron transport chain
AND both photosystems
to create a usable form of
energy for plants?
A. oxygen
B. electrons this is answer
C. pigments
Electrons passes through the electron transport chain and both photosystems to create a usable form of energy for plants
The electron transport chain is a series of four protein complexes that couple redox reaction and creating an electrochemical gradient that lead to the creation of ATP in a complete system named oxidative phosphorylation and it occur in mitochondria in both cellular respiration and photosynthesis and energy in form of ATP is generated at both cellular respiration and photosynthesis and in cellular respiration energy is synthesized in the mitochondria when electron passes through series of complex composed of the protein called as electron transport chain and electron produced from splitting water passes photosystem
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Answer: Electrons
Explanation: The electron transport chain is a series of molecules that accept or donate electrons easily
How did Democritus contribute to the understanding of matter?
A
He saw the first atom under a microscope.
B
He is credited with first proposing the idea of atoms.
C
He is credited with being the first to think of elements combining to make more complex forms of matter with his idea of fire, water, air, and earth.
Democritus contribute to the understanding of matter as He is credited with first proposing the idea of atoms.
Democritus, state that atoms are definitive to the material they are composed of . In addition, Democritus believed that the atoms differed in size and shape, and their motion is also constant. when they collided with each other they get rebound or stick together.
Democritus state that all matter was formed of different types of tiny discrete particles . Democritus was the first person in the development of the atomic theory of the universe.
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Which of the following is NOT an area of concern regarding the common type of waste management systems?
Responses
decomposition creates unsteady levels of energy
waste contains high levels of harmful bacteria
decomposition emits greenhouse gases
waste can end up in groundwater and lakes
The statement which is not an area of concern regarding the common type of waste management systems is decomposition creates unsteady levels of energy.
The first response is correct.
What is waste management?Waste management or waste disposal includes the processes and actions required to manage waste from its inception to its final disposal.
Waste management has impacts on the environment which we live. Poor waste management that ranges from non-existing collection systems to ineffective disposal causes air pollution, water and soil contamination.
Other types of waste like the open and unsanitary landfills contribute to contamination of drinking water and can cause infection and transmit diseases.
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Answer: The correct answer is decomposition creates unsteady levels of energy
Explanation: This answer has been confirmed correct.
There are no areas of concern related to energy output from decomposition.
When lactate builds up in a runner's muscles, it causes a burning sensation.
What causes this to occur?
A. The muscles are using alcohol fermentation to generate energy.
B. The muscles do not have enough oxygen for aerobic respiration.
C. The muscles are producing too much acetyl CoA.
D. The muscles have too much oxygen, causing the production of glucose
Anaerobic respiration - There is a lack of oxygen in the runner's muscles.
What is Anaerobic respiration?
Respiration is a chemical mechanism that occurs in all living cells and converts glucose into energy. Anaerobic respiration happens in the absence of oxygen and generates less energy but is faster than aerobic respiration. Fermentation is the term for microorganisms' anaerobic respiration.
The muscles do not have enough oxygen for aerobic respiration, therefore anaerobic respiration takes place causing a burning sensation in the runner's muscles. The word "anaerobic" means "without oxygen." There is no need for oxygen in this type of cellular respiration to produce energy. Smaller animals require energy to survive inside the absence of oxygen because there is not enough oxygen available for them to breathe.
Hence, (option B) is correct.
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2) Jessica and Maria are both making slime with different recipes. Jessica’s recipe calls for \large 1\frac{1}{2} cups of flour and Maria’s recipe calls for \frac{2}{3} cups of flour. How many cups of flour will they need in order to make both of their batches of slime?
With the help of fraction addition it is found that 13/6 cups of flour will be needed to make both of Jessica and Maria's batches of slime.
How are fractions added?
There are three easy steps to add fractions:
Step 1: First, ensure that the denominators (bottom numbers) are the same. If the denominators are not same take their LCM to make the denominators same.
Step 2: Add the higher numbers (the numerators), then multiply the result by the denominator.
Step 3: Simplify the fraction.
Amount of flour required in Jessica's recipe = 1 and 1/2 cups (mixed fraction) = 3/2 cups Amount of flour required in Maria's recipe = 2/3 cups.
Here the denominators of the fractions 3/2 and 2/3 are not same, therefore we need to find the LCM (lowest common factor) of 2 and 3 in order to make the denominators same for addition. The LCM of 2 and 3 is 6.= 3/2 + 2/3 = 9/6 + 4/6 = 13/6
Thus 13/6 cups of flour are needed to make both of their batches of slime
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Identify and define the anther, stigma, style, filament, pistil, petal, stamen, ovary, sepal, and ovule
A: Ovule: Ovule is that part of the plant which forms the seed of flowering plant when fertilized.
B: Ovary: The ductless reproductive gland is known as the ovary. It houses a large number of ovules. It is the part of plant where seed formation takes place.
C: Style: The stalk that joins the stigma and the ovary is long and slender, like a tube called style.
D: Stigma: The receptive tip at the top of each carpel in the gynoecium of a flower.
E: Pistil: The female reproductive organ of a flower, the pistil is located inside and is made up of three parts: the stigma, style, and ovary. The term "pistil" refers to all of this.
F: Anther: It is a yellow, sac-like structure. The pollen is placed and stored in the anther.
G: Stamen: Also referred to as an androecium, this is the male reproductive component. It is made up of : filaments and anthers.
H: Filament: It is a thin, threadlike structure that supports the anther.
I: Sepal: The green portion that lies under the petals and shields developing buds is known as a sepal.
J: Petal: Petals are a modified version of leaves that are brightly colored to attract insects for pollination. Petals also protect the flower's reproductive parts.
What are the different components of a flower?
The Vegetative components of flower are: Petals and Sepals.The Reproductive components of flower are:Stamen, Anther, Filament, Pistil, Stigma, Style, Ovary.
How does flowers reproduce?
Flowers are a plant's reproductive organs that participate in sexual reproduction. It contains the female reproductive organ known as a gynoecium and the male reproductive organ known as an androecium. Through pollination, the androecium's pollen grains are delivered to the gynoecium's stigma. The male gametes are transferred from the pollen grain to the female gamete that is already present in the ovary through the pollen tube as it grows and develops. The zygote is created when the male and female gametes combine. The ovules become seeds, and the ovary becomes fruit. When these seeds are spread in the soil, they germinate and produce new plants.
Therefore, A, B, C, D, E, F, G, H, I and J are Ovule, Ovary, Style, Stigma, Pistil, Anther, Stamen, Filament, Sepal and Petal, respectively.
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Which of the following are outcomes due to the creation of synthetic fertilizers?
More food waste
Decreased food production
Less runoff pollution
Poor quality produce
Answer:
Poor quality produce
Explanation:
Because synthetic fertilizers are man-made,It has higher levels of Nitrogen and phosphorus which causes weak bones, increased diseases of heart and stroke tendency,hence poor quality products when compared with natural fertilizers
Claim:The survival trait became common in the bed bug population because their immune system got used to the chemicals causing them to mutate in order to survive.
What would be the evidence to support this.
The evidence that would support the claim the survival trait became common in the bed bug population because their immune system got used to the chemicals causing them to mutate in order to survive is the change in the allele frequency for the mutated gene variant in the population across generations.
What is a genetic mutation?A genetic mutation can be defined as any alteration in the genetic material of an organism that may be associated with a change in the phenotype when this mutation affects a gene that encodes for such trait.
A mutation may be beneficial, deleterious or neutral depending on the resulting phenotype and it may produce a positive change in the allele frequency in the case of positive germinal mutations.
Therefore, with this data, we can see that a genetic mutation may be beneficial and it may lead to a positive change in the allele frequency when it is a germinal beneficial mutation.
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10. Which organisms are responsible for spreading the heartworm?
Infections with the Dirofilaria worm result in the disease known as dirofilariasis. One type, known as "heartworm disease" in dogs, is brought on by D. immitis.
How long can a dog skip a dose of heartworm medication?If a dose is missed, the majority of monthly heartworm medications provide at minimum 15 days of protection. This implies that even if you are just a week two late, your pet is probably still protected at that period and won't likely contract the infection.
Can people contract heartworms?Heartworms can occasionally be contracted after already being bitten by an anopheles mosquitoes. However, because humans are not heartworms' natural hosts, the larvae typically move to the arteries and lungs where they die before maturing into adult worms.
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Molecular basis of non infectious diseases
Answer:
BBA Molecular Basis of Disease addresses the biochemistry and molecular genetics of disease processes and models of human disease. This journal covers aspects of aging, cancer, metabolic-, neurological-, and immunological-based disease.
Explanation:
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Which of these is an independent variable? (Select all that apply)
CO₂ concentration
Light intensity
Prepared plant
Amount of liquid added
Experimental apparatus
Run Time
O₂ Produced
Three independent variables: CO2 concentration, Light intensity, and O2 production
How do I identify the independent variable?Put the variables in the line "The Independent variable causes a shift in Dependent variable" to distinguish dependent and independent variables in study the easiest manner possible.
What types of variables can be used in research?Characteristics called variables can have various values. It is an independent variable that doesn't alter as a result of the other variables you're attempting to assess. An independent variable could be something like a person's age. Other aspects of a person's life, like as what they eat, how much they attend school, or how much television they watch, won't alter their age.
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22. Drosophila melanogaster is a species of fruit fly commonly used to investigate patterns of genetic inheritance. Flies with a curled wing mutation have deformed wings and cannot fly. Wild-type flies have normal wings.
Fruit fly eye colour is also under genetic control. Wild-type flies have red eyes while mutant flies have white eyes.
The image below depicts two flies that carry at least one of the mutant phenotypes described above.
a)
i. Define the term wild type. (1 mark)
ii. A pure breeding fly with normal wings and white eyes is crossed with a pure breeding fly with curled wings and red eyes. All of the F1 offspring produced have curled wings and red eyes. Based on this information, use appropriate allelic notation to identify the dominant and recessive alleles for each trait. (2 marks)
b)
Several crosses between an F1 individual from part a) ii. above and a pure breeding fly with normal wings and white eyes produce the following phenotypic results.
Curled wings red eyes = 410 flies; Normal wings white eyes = 470 flies
Curled wings white eyes = 81 flies; Wild type for both traits = 79 flies
Use this information to determine if these genes are linked or unlinked. Justify your answer. (2 marks)
ai. A wild-type species can be defined as a species whose genotype shows the normal genotype and there has been no mutation in the genetic sequence of the species.
aii. The allelic notation is as follows:
W = curled wings (dominant) w = normal wings (recessive)R = red eyes (dominant)r = white eyes (recessive)b. Based on the obtained phenotypic ratio of 6 : 1 :1 : 6 instead of the expected phenotypic ratio of 1 : 1 :1 : 1, curled wings red eyes as well as Normal wings white eyes are linked genes.
What are genotypes?Genotypes refer to the sum of the genetic makeup of a species. The genotype of a species refers to the sum total of the allele of a gene that an organism has.
The genotype of a species determines the phenotype of that species.
The phenotype refers to the physical expression of the genotype of a species.
Wid-type species are species that have not undergone a mutation.
Considering the given data:
W = curled wings is dominant
w = normal wings is recessive
R = red eyes is dominant
r = white eyes is recessive
b. The F1 generation be WwRr
The cross: WwRr x wwrr:
Expected genotypes (phenotypic ratio): WwRr x4 (curled red); Wwrr x4(curled white); wwRr x4(normal red); wwrr x4 (normal white)
Phenotypic ratio = 1 : 1: 1 : 1
Obtained genotypes (phenotypic ratio): 470 : 81 : 79 : 81 = 6 : 1 : 1 : 6
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