One radioactive isotope of oxygen, O18, is utilized as a reactant, and the products generated in the reaction are investigated.
How can we be certain that the oxygen produced during photosynthesis is derived from water?To track the destiny of oxygen atoms during photosynthesis, a heavy isotope is used as a tracer. The investigations demonstrated that only when water was the source of the tracer did the O2 from plants get labeled with 18O.
Who established that the water that water evolved from during photosynthesis is oxygen?Ruben and Kamen are the right response. Ruben and Kamen established that water is the source from which oxygen developed during photosynthesis. The splitting of water molecules to release oxygen molecules is referred to as photolysis, which is an oxidation of water.
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Some plants have stems called that grow along the ground, while fungi have hyphae that grow underground. These plant stems are involved in and hyphae are involved in. Both of these structures help the organisms.
Answer:
1. Runners2. Nutrient distribution3. Nutrient absorption 4. Reproduce
Explanation:
Answer:
As the guy above said, 1: runners, 2: nutrient distribution, 3: nutrient absorption, and 4: reproduce.
Hope this helps!
Explanation:
Typically, a lymphocyte will encounter its first exposure to a foreign antigen in the:
Red bone marrow
Yellow bone marrow
Thymus gland
Secondary lymphatic structures
A lymphocyte will encounter its first exposure to a foreign antigen in the Red bone marrow.
What does having low lymphocytes mean?These cells aid in defending your body against illness. You are more vulnerable to infection if you have an inadequate amount of lymphocytes (lymphopenia). Lymphopenia symptoms vary in severity depending on how severe the condition is and how long it has persisted. Some individuals show no symptoms.Most animals have lymphocytes as a sort of white blood cell in their immune systems. Natural killer cells, T cells, and B cells are examples of lymphocytes. They are the primary class of cells in lymph, thus the term "lymphocyte." Between 18% and 42% of the white blood cells that are in circulation are lymphocytes.
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human hair type is transmitted as an (autosomal) incomplete dominant trait. if curly-haired paul marries straight-haired pam, what percent of their children would have curly hair?
Human hair type is transmitted as an (autosomal) incomplete dominant trait, so if curly-haired Paul marries straight-haired pam, percent of their children that would have curly hair is 0%.
What is an autosomal incomplete dominance?Incomplete dominance is a form of gene interaction where both alleles of gene at a locus are partially expressed, resulting in an intermediate or different phenotype. It is also called partial dominance.
This pattern of inheritance is described as incomplete dominance because neither of the alleles is completely dominant over the other as both alleles can be seen at the same time. For example: allele for red flowers is incompletely dominant over the allele for white flowers, so Red + white = pink.
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The area between the presynaptic nerve cell and the postsynaptic muscle cell is termed the synaptic cleft.
T or F
The synaptic cleft is the name for the tiny space that exists between the membrane of the postsynaptic cell and the axon terminal of the presynaptic neuron. Thus this statement is true.
What is the synaptic cleft ?A synapse, or space where two neurons connect to one another, is called a synaptic cleft. Pre-synaptic neurons are attached to one side of it, and post-synaptic neurons are attached to the other. There is always an axon terminal on the presynaptic neuron.
Synaptic cleft refers to the area between two neurons where a neurotransmitter transmits an impulse. Presynaptic neurons and postsynaptic neurons are the two types of neurons that deliver and receive information, respectively.
These signals can also be modified through the synaptic cleft, such as by lengthening or shortening the signal's duration or adding more than one signal. The synaptic cleft's chemical makeup enables signal modulation, summarization, and a high degree of control rather than the straightforward on/off switch that is typical of electrical impulses.
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How does CO2 affect the rate of photosynthesis?
Answer:
CO2 affect the rate of photosynthesis because the increased of the amount of carbon dioxide increase photosynthesis, spurring plant growth.
What caused the changes to the form of the embryo?
12. A child has a mass of 2.7 kg. Find his/her approximate weight in N
Answer:
Given:-Mass(M)=2.7 K.g
TO FINDweight = ?
Formulaweight = Mass × gravity
We know gravity (g) = 9.8 m/s²
CalculationSo weight (w) = 2.7 k.g× 9.8 m/s²
= 26.46 Newton
[tex] [/tex]
Thank you
8. Which of the following best represents the energy flow
between photosynthesis and
cellular respiration?
a. Sunlight → photosynthesis →→ ATP → cellular
respiration →→ Glucose
-
b. Sunlight → cellular respiration → ATP →
photosynthesis → ADP
c. Sunlight → photosynthesis →→ Glucose → cellular
respiration →→ ATP
d. Sunlight → cellular respiration→ Glucose →
photosynthesis →→ATP
OD
carbohydrates, cellular respiration, ATP, light, photosynthesis, and water best represents the energy flow between photosynthesis and cellular respiration
Plants (including algae and some bacteria) employ sunlight, water, and CO2 during photosynthesis to produce sugars (carbohydrates). This reaction, which takes place in chloroplasts, results in the reduction of CO2 (gaining electrons), oxidation of water (losing electrons), and production of oxygen (O2). The usage of that O2 in cellular respiration follows. Cellular respiration takes place in mitochondria and consumes glucose and oxygen to create ATP, which is the energy source. H2O and CO2 are created.
Photosynthesis is essential to most life on Earth. Plants, microalgae, as well as some types of bacteria carry out the process by capturing solar energy to create oxygen (O2) plus biochemical power is supplied in glucose (a sugar). Consequently, herbivores get this energy from consuming plants, and carnivores get it from eating herbivores.
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How does a negative feedback
loop maintain homeostasis?
A. it creates an external response
B. it works to bring the body back to the target of
stability
C. it moves the characteristic above normal
limits
D. it creates an increase in product of a reaction
Negative feedback helps to keep a variable within its regular range and lessens an overreaction.
How does unfavourable criticism work and what is it?
Negative feedback occurs when an output of a system, process, or mechanism is given back in a way that aims to reduce oscillations in the output, whether these oscillations are caused by changes in the input or other disturbances.
What possible repercussions could negative feedback have?
Because the feedback energy (voltage or current) is out of phase with the input signal when there is negative feedback, the input signal opposes the feedback energy. Negative feedback reduces the amplifier's gain. It also reduces distortion, noise, and instability. The bandwidth is increased while the input and output impedances are improved by this feedback.
Become familiar with Bandwidth.
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Answer: B
Explanation:
Pathogenic bacteria are likely to multiply rapidly when environmental temperatures are between.
Answer:
20-40
Explanation:
they multiply in an environment at lower temperature
A blood platelet drifts along with the flow of blood through an artery that is partially blocked by deposits. As the platelet moves from the narrow region to the wider region, it experiences.
Where would you expect to see the ligand binding site of a neurotransmitter-gated ion channel protein?.
Transmembrane ion channels known as ligand-gated ion channels open or shut (controlled passage) in response to the interaction of a chemical signalling agent such as a ligand.
An essential family of plasma membrane proteins known as ligand gated ion channels (LGIC) mediates cell-cell communication and cellular excitability. The electrically excitable cells like neurons are a fairly typical location to discover ligand-gated ion channels.
Ligand-gated ion channels (LGICs) are membrane proteins that are structurally integral and feature a pore that permits the controlled passage of certain ions across the plasma membrane. The electrochemical gradient for the permeant ions drives the passive ion flow.
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Which of these factors does cites fail to consider when determining which species to cover?.
The sustainability of the Ecosystem is the factor that CITES neglects to take into account when choosing which species to cover. A biological setting with several habitats that are capable of thriving and supporting itself independently is referred to as a sustainable ecosystem.
The biosphere can meet the needs of the current generation without compromising the ability of future generations to meet their own needs.
Sustainability is essential for many reasons, including Environmental Quality - Healthy communities require toxic-free environments, clean air, and natural resources. Growth - As UNTHSC's enrollment keeps expanding, we need additional space, energy, and water.
Thus, we can conclude that CITES fails to consider the sustainability of the ecosystem when deciding which species to include in its list of protected species.
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Your question is incomplete. Please find the complete question below.
Which of these factors do CITES fail to consider when determining which species to cover?
a.Species population
b.Economic impact
c.Analysis of trade
d.Ecosystem sustainability
If a color-blind man marries a woman who is a carrier for color blindness, it is most probable that
A. all of their sons will have normal color vision.
B. half of their sons will be color-blind.
C. all of their sons will be color-blind.
D. none of their children will have normal color vision.
The answer is C right?
Answer:
B. half of their sons will be color-blind.
Explanation:
If a color-blind man marries a woman who is a carrier for color blindness, their children will inherit one X chromosome from the mother and one from the father. If a son inherits the abnormal X chromosome from the mother, he will be color-blind. Since the mother has one normal X chromosome and one abnormal X chromosome, there is a 50% chance that a son will inherit the abnormal X chromosome and be color-blind.
Water lilies do not grow in desert sand because water availability to these plants in a desert is.
Water supply to these plants in a desert is a limiting element, hence water lilies cannot flourish in desert sand.
A perennial aquatic plant with floating leaves known as a fragrant water lily is often found in water that is 3 to 6 feet deep. It grows in ditches, slow-moving streams, freshwater lakes, and ponds. It is pH-tolerant across a wide range. prefers muddy lake/pond bottoms to silty ones.
The growth of water lilies requires sunlight. While they can tolerate moderate shadow for a while, they still require sunlight for at least three hours each day. You should be careful to place them far from any pumps or leisure areas because moving water is harmful to their growth.
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Explain how radiometric dating is used to determine the age of an object.
Be sure to give details.
Radiometric dating, which examines the ratio of two distinct isotopes in a sample, establishes the age of rocks.
How does radiometric dating work to establish an object's age?
The fundamental idea behind radiometric dating is that by comparing an isotope's presence in a sample to its abundance on Earth and its known half-life (rate of decay), you may determine the sample's age.
What can we determine using radiometric dating?
It offers an important source of knowledge regarding the ages of fossils and the estimated rates of evolutionary change by enabling the development of geological timelines.
Ancient artefacts and archaeological materials are both dated using radiometric methods
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the duodenum contains these structures whose products neutralize the acidic material from the stomach.
The duodenum and stomach are divided by the pyloric sphincter. Pancreatic fluids, an alkaline mixture rich in bicarbonate, are mixed with stomach chyme to balance its acidity.
What part in the body does the duodenum play?The small intestine begins in the duodenum. The major function of the duodenum is to complete the initial stages of digestion. Food from the stomach is combined with bile from the gallbladder and other substances in this area of the intestine.
What issues could develop in the duodenum?Dyspepsia or epigastric discomfort, anorexia, obstructive symptoms, early satiety, nausea, vomit, & weight loss are all symptoms that patients with duodenal lesions exhibit. Long-term sickness raises the chance of duodenal cancer, which can manifest as inflammatory lesions, prohibitions, and fistulas.
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which of the following most accurately describes biomass energy? select one: a. energy produced with nuclear atoms are split. b. energy produced from burning recently living organisms. c. energy produced from heat stored deep within the earth. d. energy produced from burning ancient, fossilized remains of organisms.
Option B. Energy produced from burning recently living organisms, most accurately describes biomass energy.
Energy created or generated by living or formerly living organismsis known as biomass energy. Plants like the aforementioned corn and soy are the most prevalent types of biomass energy that are utilized for energy. These organisms energy may be used to generate electricity or be burnt to provide heat. biomass energy . When organic material is burnt as a fuel source, electricity can be produced. biomass energy is the term for these fuels, which can be anything from plants to wood to organisms . Crop wastes, for example, are a source of biomass, a sustainable energy source made from organisms ,forest waste. Purpose-grown grasses.
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What are the common types of mutations that occur to convert proto-oncogenes to oncogenes?.
Answer:
Point mutation. This mutation alters, inserts, or deletes one or more nucleotides (building blocks of DNA and RNA) in a gene sequence. ...
Gene amplification.
Chromosomal translocation (rearrangement).
chemicals called uncouplers can make membranes permeable to small molecules and ions. what effect might uncouplers have on cellular respiration?
Uncouplers may have an adverse effect on cellular respiration, resulting in lower ATP synthesis since the proton gradient would be reduced.
How could uncouplers affect cellular respiration?Increasing the amount of cellular respiration is possible by including an uncoupler (FCCP), which reduces the proton motive force by causing a short circuit of protons on the inner mitochondrial membrane. Substrate oxidation in this condition serves as the primary predictor of oxygen consumption.
How do uncouplers impact the cycle of electron transport?Uncouplers of oxidative phosphorylation prevent the electron transport and phosphorylation processes from coupling, which prevents the production of ATP without disrupting the respiratory chain or ATP synthase (H(+)-ATPase).
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vibrations from the tympanic membrane to the oval window are transmitted by the structures at which numbers?
The 3 and 4 are the structures at which the tympanic membrane to the oval window are communicated.
An example of a tympanic testHow well your middle ear is functioning is determined through a test called tympanometry. By tracking the motion of your eardrum, it does this. The outer ear, middle ear, and inner ear are all separate structures that make up your ear. You receive sound as energy or vibrations through your outer ear.
The tympanic bone's location is unknown.The temporal bone's tympanic portion, which surrounds the external portion of the ear canal, is a curving plate of bone that sits under the squamous portion, in front of the mastoid process.
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Two inect group vary genetically by two gene. When put together, they were able to reproduce and produce offpring that could alo breed. Which bet decribe thi inect population?
They are the same species of insects.
A group of organisms that can reproduce sexually and can result in live, fertile offspring is referred to be a species. Even though there are two genes that separate two insect groups genetically, if they are compatible for mating, they can produce fertile offspring, especially if they are of the same species.
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Construct a food chain. Label the producer, primary consumer, secondary consumer, and tertiary consumer. An owl eats a snake, the snake eats a squirrel, the squirrel ate a nut.
Answer:
Owl - tertiary consumer
⬆️
Snake - secondary consumer
⬆️
Squirrel - primary consumer
⬆️
Nut - producer
considering how it is transmitted, which would be the most effective preventive measure against lyme disease among a stable of racehorses?
The most effective preventive measure against Lyme disease among a stable of racehorses is Spraying down the stables regularly with an insecticide designed for ticks.
After removing the tick Abigail Bartholomew begins on antibiotics. Abigail worries that an open wound from a tick will lead to sepsis. The vascular system also called the circulatory system consists of blood vessels that carry blood and lymph throughout the body.
Arteries and veins carry blood throughout the body deliver oxygen and nutrients to the body's tissues and remove waste products from the tissues. Although many young animals can die the disease is usually not fatal in adult animals. However, it causes severe pain and suffering, especially in cattle. Animals can become permanently lame and recovering animals can be less productive.
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Where is the center of the anatomic origin of the anterior talofibular ligament on the fibula?.
Answer:
Hope this helps!
Explanation:
The fibular origins of ATFL and CFL are concentrated in the lower part of the lateral malleolus and connected with connective fiber [18]. Also, ligament injury is likely to occur at the fibular side or substantial part of the ligament [4, 6]
Which of the following does not serve as a way to neutralize the charge in a body? Question 18 options: A) Bringing the charged body into contact with another body having an equal but opposite charge B) Adding free electrons to a positively charged body C) Adding more protons to a positively charged body until the number of protons matches the number of electrons D) Allowing free electrons to escape from a negatively charged body
Adding free electrons to a positively charged body does not serve as a way to neutralize the charge in a body. Option B is correct.
How do you neutralize a charge?
Static electricity can be effectively eliminated by grounding a conductive or dissipative conductor. A non-conducting insulator holds an electronic charge and cannot be grounded to "drain" the charge.
All surfaces, products and personnel are electrically grounded to ground all conductors according to the first ESD control principle. Bonding means connecting or connecting through a resistor, typically 1 to 10 megohms.
A wristband dissipates charge from the operator and a properly grounded mat provides a path to ground for his exposed ESD sensitive equipment.
Movable objects (containers, tools, etc.) are glued by standing on the glued surface or held by the person being glued.
If the static charge in question is on something that cannot be grounded. B. With insulators, ESD control principle number 2 applies and the insulators must be removed. According to the ANSI/ESD S20.20 ESD standard, "All non-essential insulation such as coffee cups, food wraps, and personal items must be removed from the EPA."
Therefore, Adding free electrons to a positively charged body does not serve as a way to neutralize the charge in a body. Option B is correct.
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what are examples of types of chemical markers associated with dna that determines when, where and by how much genes are expressed in each cell?
Histone proteins and epigenetic factors work together to determine when, where and at what level genes are expressed in each cell.
How many genetic markers are used to identify a human?Most of the methodological approaches to identify an individual are based on two types of molecular genetic markers: 1) STRs (Short tandem repeats and 2) SNPs (single nucleotide polymorphisms).
What chemicals affect gene expression?In vitro, animal, and human studies have found different classes of environmental chemicals that alter epigenetic marks, including metals (cadmium, arsenic, nickel, chromium, methylmercury), air pollutants and peroxisome proliferators (trichlorethylene, dichloroacetic acid, trichloroacetic acid).
How many markers are there in DNA?The advanced results up to 68 DNA markers, compared to the industry standard 16 DNA markers, with a result accuracy of 99.9999%. Testing fewer markers may seem cheaper, but clients are more likely to be inconclusive about all significant results
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Yesterday i saw thousands and thousands of frog egg in the pond. The frogs _ of their offspring is incredible !
A. biology
B. genetic variation
C. organism
D. population
E. species
F. environment
G. offspring
H. overproduction
i. reproduction
The frogs genetic variation of their offspring is incredible.
Life cycle of frogs:The process begins when adult frogs deposit hundreds of small eggs, known as frogspawn, that collect together in clusters. Early in the spring, as the temperature is just beginning to warm up, this occurs.
Tadpoles won't move around much for the first week or two after hatching since they are still taking nutrition from the yolk of their egg. But once the yolk is completely consumed, the tadpoles are large and robust enough to enter their aquatic environment.
Frogs and toads depend on water significantly less as adults. They can live on land as long as they stay in the shade and don't dry up, but they frequently go back to ponds and lakes for a splash.
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Question 14
Which stage of the water cycle is most like respiration in the carbon cycle?
A. Runoff removes water from the atmosphere like respiration removes carbon from the atmosphere
B. Condensation removes water from the atmosphere like respiration removes carbon from the atmosphere
C. Evaporation returns water to the atmosphere like respiration returns carbon to the atmosphere
D. Precipitation returns water to the atmosphere like respiration returns carbon to the atmosphere
Answer: B. Condensation removes water from the atmosphere like respiration removes carbon from the atmosphere
Explanation: To be able to answer this question to the best ability, we first need to know what respiration in the carbon cycle is. Respiration in the carbon cycle is when animals and plants get rid of the carbon dioxide gas. So, we know that respiration is the process of getting rid of carbon dioxide right? That means that C and D can not be correct! That leaves us with A. and B. Option A cannot be correct because runoff does not remove water from the atmosphere, so, the correct answer must be B!
corona viruses are approximately 0.5micm in diameter how many coronaviruses could fir across a water froplet that was 1cm across
Number of corona virus that can be fitted into one water droplet is 39990
The volume of a sphere is the amount of space occupied inside the sphere. A sphere is defined as a three-dimensional round solid with all points on the sphere equidistant from the center. The fixed distance is called the radius of the sphere and the fixed point is called the center of the sphere.
Explanation:
1 mm is equals to 1 x 10-4 cm
Given, the diameter of corona virus is 0.5 mm i.e equals to 5 x 10-5 cm
Assuming corona virus is spherical in shape, volume of one corona virus is
Volume(c)=[tex]\frac{4}{3} \pi r^{3}[/tex]
Where, r is the radius of virus = diameter of virus/2
= 5 x 10-5 / 2 = 2.5 x 10-5
Putting value of r in above equation,
Volume(c)=[tex]\frac{4}{3} \pi (2.5*10^{-5}) ^{3}[/tex]
= 0.0001047 cm3
Now we have to calculate volume of one water droplet. We have diameter of water droplet is 1 cm . So volume will be
Volume(w)=[tex]\frac{4}{3} \pi (1) ^{3}[/tex]
= 4.187 cm3
Number of corona virus that can be fitted into one water droplet is Volume of one water droplet / volume of one corona virus = Volume (W) / Volume (C) = 4.187/ 0.0001047 = 39990.448 = 39990
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