Answer:
True
Explanation:
Answer:
true
Explanation:
the plasma membrane of a cell is composed of phospholipids
Which scenario describes a way that an abiotic factor can impact a marine system? Liquid water turning into solid ice encourages animal hibernations. Predation on krill is higher at the surface than at the depths. Rapid increases in water temperature cause extensive fish kills. Reproductive rates of seals show a dramatic increase.
Answer:
Rapid increases in water temperature cause extensive fish kills
Explanation:
Biotic factors are all living organisms that contribute to an ecosystem. On the other hand, abiotic factors are non-living factors, such as climatic factors (temperature, rainfall, wind), edaphic factors (soil type, soil texture, soil aeration etc). Changes of abiotic factors can have a huge influence on living organisms of ecosystem. The effects might be benefical or harmful.
Some of the most common abiotic factors that can impact a marine ecosystem are water temperature, currents, light, alkalinity, oxygent concentration etc.
as In the case of Marie curie, prolonged exposure to radioactivity of any kind can lead to all but one of these results
Pneumonia is not a result of prolonged radioactivity exposure, most especially regarding the cause of death of Marie Curie. In fact, pneumonia is primarily caused by bacteria and viruses infecting our lungs most specifically the alveoli. This alveoli gets filled with fluid, like water, that would cause extreme coughs.
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How many chromosomes do human beings have?
Answer:
46
Explanation:
Each cell normally contains 23 pairs of chromosomes
Which of the following real-world examples models linear motion? A. Throwing a rock in the air at a 60-degree angle B. Throwing a rock in the air at a 45-degree angle C. Running 50 m along a straight track D. Running around the curve of a track
Answer:
c is the correct option
Answer:
Option C, Running 50 m along a straight track
Explanation:
Linear motion is one directional motion which requires only one dimension to explain it. This motion is along a straight line.
In all other options either the motion is taking place along a curved path(as in option D) , thereby making it a curvilinear motion or the motion is taking place at some angle (as in option A and B) thereby making it angular motion.
hence, option C is correct.
A double slit arrangement produces interference fringes for yellow sodium light. To produce narrower-spaced..?fringes, should red light or blue light be used?
Answer:
Blue light
Explanation:
Bcoz fringe widht is directly proportional to wavelength of light
And red has longest wavelength
Blue has shortest
The rate of cellular respiration is regulated by its major product, ATP, via feedback inhibition. As the diagram shows, high levels of ATP inhibit phosphofructokinase (PFK), an early enzyme in glycolysis. As a result, the rate of cellular respiration, and thus ATP production, decreases. Feedback inhibition enables cells to adjust their rate of cellular respiration to match their demand for ATP. Suppose that a cell's demand for ATP suddenly exceeds its supply of ATP from cellular respiration. Which statement correctly describes how this increased demand would lead to an increased rate of ATP production?
a) ATP levels would fall at first, decreasing the inhibition of PFK and increasing the rate of ATP production. b) ATP levels would rise at first, decreasing the inhibition of PFK and increasing the rate of ATP production. c) ATP levels would fall at first, increasing the inhibition of PFK and increasing the rate of ATP production. d) ATP levels would rise at first, increasing the inhibition of PFK and increasing the rate of ATP production.
Answer:
ATP levels would fall at first, decreasing the inhibition of PFK and increasing the rate of ATP production.
The diagram shows the female reproductive system. What structure is indicated by the arrow?
Arrow is pointing to the cavity in the center of the female reproductive system, to which the fallopian tubes and the vagina lead.
Cervix
Ovary
Uterus
Vagina
Final answer:
The structure indicated by the arrow in the diagram of the female reproductive system is the uterus, a pear-shaped muscular organ that is central to pregnancy, menstruation, and childbirth.
Explanation:
The structure indicated by the arrow in question, which points to the cavity in the center of the female reproductive system, is the uterus. The uterus is a pear-shaped muscular organ that is connected to the Fallopian tubes at its upper end, and it connects to the vagina through the cervix at its lower end. The primary function of the uterus is to nourish and carry a fetus during pregnancy, and it plays a vital role in the menstrual cycle and childbirth process. The other options, such as the ovary, which produces eggs and secretes estrogen, and the cervix, which is the lower part of the uterus, are different parts of the female reproductive system.
Brainliest will be given!!!
Look at the diagram of a solar eclipse.
At which location is the solar eclipse viewed in totality?
1
2
3
4
Answer:
The answer to this question is 3
Rank the sequence of events at the NMJ that initiate an action potential in the muscle fiber, from first to last.- Action potential arrives at the axon terminal.- Acetylcholine binds to its receptors on the junctional folds.- Calcium ions enter the axon terminal.- Synaptic vesicles fuse to membrane of axon terminal.- Junctional folds become depolarized.- Action potential is initiated on the sarcolemma.- Acetylcholine is released into the synaptic cleft.
Answer:
Action potential arrives at the axon terminal.
Calcium ions enter the axon terminal.
Synaptic vesicles fuse to membrane of axon terminal.
Acetylcholine is released into the synaptic cleft.
Acetylcholine binds to its receptors on the junctional folds.
Junctional folds become depolarized.
Action potential is initiated on the sarcolemma.
Explanation:
When the electrical signal (action potential) reaches the axon terminal it opens Ca channels that release Ca ions from the outside inside the axon terminal. Ca ions trigger the fusion of vesicle with membrane of the presynaptic cell (axon terminal). As a consequence, neurotransmitter-acetylcholine is released into the synaptic cleft. It diffuses to the postsynaptic cell and binds to its receptor (nicotinic acetylcholine receptor). The binding of acetylcholine leads to the depolarization of the sarcolemma.
If astronomers discovered a new inner planet in the solar system, which characteristic would it most likely have?
large size
gaseous composition
many moons
fast revolution
Should be FAST REVOLUTION...
Brainly please!
Answer:
Fast revolution
Explanation:
The inner planets are composed of metallic rocks. They have rocky surface. The inner planets are Mercury, Venus, Earth and Mars. These are very small as compared to outer planets (Jupiter, Saturn, Uranus and Neptune). Also, the inner planets have very less moons as compared to outer planets. Outer planets have gaseous composition; mainly of hydrogen and helium.
The inner planets revolve around the sun faster than the outer planets. From Kepler's planetary law, we understand that the closer a planet to a star, faster would be its revolution and smaller would be its orbital period.
Thus, a new inner planet in the solar system would most likely have fast revolution.
Where in the cell does transcription occur?
Nucleus. Transcription is the process in which DNA is being copied to RNA and this process occurs in the Nucleus. Hope that satisfies your question
An original DNA sequence is: CGA TGG CCA TTA. The mutated sequence is: CGA GG CCA TTA This mutation is called a ________________. deletion replacement hybrid
This type of mutation would be called a deletion
Hope this helps :)
Answer:
Deletion
Explanation:
The microscopic view of sandstone contains what two components?
Sand Grains and Cement
Which piece of food equipment is allowed to rapidly reheat time/temperature control for safety food for hot holding?
microwave? i’m not too sure
Final answer:
A pressure cooker is suitable for rapidly reheating time/temperature control for safety food for hot holding, as it can quickly heat food to high temperatures that are necessary for safety and limit bacterial growth.
Explanation:
The piece of food equipment that is allowed to rapidly reheat time/temperature control for safety food for hot holding is a pressure cooker. This type of equipment is effective in quickly heating foods to the required temperature for safe hot holding. Pressure cookers work by raising the boiling point of water through increased pressure, permitting food to be reheated to temperatures as high as 252°F (122°C). It's crucial to achieve these high temperatures rapidly to limit the growth of bacteria and ensure that food reaches safe internal temperatures, as microbial growth is most rapid between 40 and 140 degrees Fahrenheit (4 and 60 degrees Celsius). According to the USDA, using a thermometer is the best way to ensure that food reaches the proper internal temperature for safety.
Priscilla is in an auto accident that causes her head to crash against the windshield. her brain is pressed against the skull and bruised by the impact. she loses consciousness for three days, but none of the brain tissue is torn. priscilla experienced a ____.
Priscilla experienced a coma
A eukaryotic gene is most likely to be transcribed if it is located where?
Answer:
in a euchromatic region of the genome
Name and discuss a source of error in performing and evaluating gel electrophoresis
Answer:
Contamination of a sample
Explanation:
Gel electrophoresis is a method used in molecular biology for DNA analysis. This method includes the separation of DNA fragments through the gel according to their size or shape.
One of the major source of error is contamination of the DNA sample. This refers to the presence of foreign DNA in the sample of interest. As a consequence, the gel will have more bands.
Another errors might appear as a result of wrong concentration of the gel, wrong buffer pH, high/low concentration of dye etc.
Answer:
Contamination of a Sample
Explanation:
Choose from the following the requirements for an electric current.
an insulating material through which to travel
a conduction path
a source of energy
cold temperatures
I think the answer would a source of energy which would be answer C
*5 Minutes LEFT*The scatter plots indicate the population of rabbits in the population over time. The y-axis represents the number of rabbits and the x-axis is time.
Which graph *most likely* represents a rabbit population that found a new, larger habitat, but then eventually experienced an increase in predation?
Graph A
Graph B
Graph C
Graph D
Answer:
The answer to that is C, just took the same quiz.
Explanation:
increases and then decreases because of predators. Hope this helps :)
Which of the following statements accurately represents characteristics of NMR and x‑ray crystallography? X‑ray crystallography can be used only for larger proteins or complexes. The limitations of x‑ray crystallography and NMR are the same with respect to all proteins. NMR is preferable to x‑ray crystallography because it can be used with proteins in a wider range of molecular weights. X‑ray crystallography generally gives a more detailed (higher resolution) view than does NMR.
Answer:
X‑ray crystallography generally gives a more detailed (higher resolution) view than does NMR.
Explanation:
X-ray crystallography and nuclear magnetic resonance (NMR) are two major techniques for the examination of protein structure. Both of them have their advantage in use, and each of them is appropriate for a certain type of examination.
X‑ray crystallography has high resolution and it is not that much limited by the protein molecular weight. Disadvantage is that the protein that is being examined must be in the crystal structure. Another disadvantage is that this method gives the static structure of the protein (motions are not available).
NMR advantage is that the structure of the protein is in its native state (it includes dynamics and intermolecular interactions) andd it doesm't have to be crystallized. Disadvantage of NMR is it cannot be used for large molecules (64kDa is the largest molecular mass).
X-ray crystallography generally gives a higher resolution image than NMR and can be applied to both small and large proteins if they can be crystallized. NMR is useful for proteins that cannot be crystallized and for studying proteins in solution.
The characteristics of NMR (Nuclear Magnetic Resonance) and x-ray crystallography are distinct from one another in the context of analyzing proteins. The statement that x-ray crystallography gives a more detailed (higher resolution) view than NMR is generally true, as x-ray crystallography can determine the three-dimensional structure of a protein crystal at atomic resolution. However, this method has limitations, particularly that it requires the protein to form ordered crystals, which is not always possible due to the inherent shape of some proteins. Moreover, x-ray crystallography can indeed be used for larger proteins or complexes, as size does not matter if the protein can be crystallized. On the other hand, NMR does have its advantages, particularly for studying proteins that do not easily crystallize and for analyzing proteins in their natural solution state, revealing information about protein dynamics.
Population A is made up of living animals. The members of population B feed on these living animals. What type of relationship is represented by population A and B?
Answer:
meow
Explanation:
fr fr
Why is it likely that MOST speciation is allopatric?Because disruptive selection between forms of traits in sympatric populations is always very strong.Because vicariance events are common.Because related species are always found in allopatry rather than in sympatry.Because gene flow between populations prevents genetic divergence in sympatry.Because gene flow between diverging populations is strong in allopatry.
Answer:
Because gene flow between populations prevents genetic divergence in sympatry
Explanation:
Allopatric speciation is a form of speciation (creation of new species) that occurs as a result of geographic isolation. This means that a part of population becomes physically separated from the initial main population. There is no gene flow between these two populations and as a result the two populations reach a high level of genetic divergence. They can no longer interbreed which means they become two different species (speciation).
New populations evolve as result of mutation, genetic drift and natural selection.
Sympatric speciation is a form of speciation without geographic isolation, usually due to the reproductive isolation or changes in the chromosomes of the organism.
Most speciation is likely to be allopatric because it involves the geographic separation of populations, restricting gene flow between them and allowing for genetic divergence and the development of new species over time.
Explanation:In most cases, speciation occurs through allopatric speciation, which involves the geographic separation of populations from a parent species and subsequent evolution. This is because isolation of populations is more likely to occur and persist in allopatry than in sympatry. Allopatric speciation can result from events such as dispersal, where a few members of a species move to a new area, or vicariance, where a natural situation physically divides organisms. This geographic separation restricts gene flow between populations, allowing for genetic divergence and the development of new species over time.
What enzymes are involved in the citric acid cycle?
Answer:
mitochondrial isoenzymes which is involved in the Krebs cycle
cytosolic isoenzymes is involved in metabolism of amino acids
Answer: the citric acid cycle is regulated primarily by the concentration ATP and NADH. key control points re enzymes isocitrate dehydrogenase and aketoglutarate dehydrogenase.
When a zygote divides into separate cells it is called
The answer is embryo
The body of a dead animal becomes very stiff in a condition called “Rigor Mortis”. Which of the following is NOT a factor in the development of rigor mortis? Calcium is released from calcium stores inside muscle cells. Tropomyosin proteins do not block myosin binding sites along actin filaments. Myosin heads remain bound to actin filaments after their power stroke. Calcium binds to the Troponin Complex. Lack of ATP synthesis causes a failure of myosin heads to bind to actin filaments.
Myosin heads remain bound to actin filaments after their power stroke.
some ways to help hair grow back fast
Finish your shower with a cool rinse.
Distribute your hair's natural oil.
Read the following statements that describe an HIV infection. What is the correct order in which they occur?
1) Viral DNA enters nucleus and inserts itself into host DNA.
2) Virus attaches to host cell membrane.
3) Virus coat fuses with cell membrane and viral RNA enters the cell.
4) The new viruses bud off from the host cell membrane.
5) Viral mRNA directs the host cell to assemble viral proteins.
6) Reverse transcriptase uses viral RNA as a template to make viral DNA.
Question 2 options:
A. 3,2,1,5,6,4
B. 3,2,1,6,5,4
C. 2,3,1,5,6,4
D. 2,3,6,1,5,4
Answer:
D. 3,2,1,5,6,4
Which of the following samples will have the greatest volume at STP?a. 22 g Neb. 22 g Hec. 22 g O2d. 22 g Cl2 e. All have the same V at STP
Answer:
22g of He
Explanation:
Volume of gas at STP is given as :
Volume occupied(dm³) = number of moles x 22.4dm³mol⁻¹
In order to solve this given problem, we would first find the number of moles from the different masses of atoms and molecules given.
Number of moles = [tex]\frac{mass }{Molar mass}[/tex]
Now, let us obtain the molar mass of the given atoms and elements:
For Ne; molar mass is the atomic mass = 20gmol⁻¹
He = 4gmol⁻¹
O₂ = (16 x2)gmol⁻¹ = 32gmol⁻¹
Cl₂ = (35.5x2)gmol⁻¹ = 71gmol⁻¹
Number of moles of Ne = [tex]\frac{22}{20}[/tex] = 1.1mol
Volume occupied by Ne at STP = 1.1 x 22.4 = 24.64dm³
Number of moles of He = [tex]\frac{22}{4}[/tex] = 5.5mol
Volume occupied by He at STP = 5.5 x 22.4 = 123.2dm³
Number of moles of O₂ = [tex]\frac{22}{32}[/tex] = 0.688mol
Volume occupied by O₂ at STP = 0.688 x 22.4 = 15.4mol
Number of moles of Cl₂ = [tex]\frac{22}{71}[/tex] = 0.3099mol
Volume occupied by Cl₂ at STP = 0.3099 x 22.4 = 6.94dm³
An enzyme is a protein that A)transports nutrients across a membrane B) increases the rate of a chemical reaction C)receives and sends signals across a cell D)provides structure for the cell's organelles
An enzyme is a catalyst for chemical reactions. Catalyst means that it "speeds up" something. This means that the answer is:
B) Increases the rate of a chemical reaction
Hope this helped!
~Just a girl in love with Shawn Mendes
A 57-year-old woman has palpitations, chest discomfort, and tachycardia. the monitor shows a regular wide-complex qrs at a rate of 180/min. she becomes diaphoretic, and her blood pressure is 80/60 mm hg. which action do you take next?
The next appropriate action to take would be to administer synchronized electrical cardioversion.
What is the blood pressure?
The mentioned signs and findings point to a potentially fatal disease known as unstable ventricular tachycardia. The main warning signs include palpitations, chest pain, tachycardia (180 beats per minute heart rate), profuse perspiration (diaphoresis), and hypotension (80/60 mmHg blood pressure).
A dangerous heart rhythm abnormality that needs rapid attention is unstable ventricular tachycardia. Synchronized electrical cardioversion is the suggested treatment in this situation.
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In a medical emergency with a patient showing tachycardia, diaphoresis, chest discomfort, and low blood pressure, immediate ACLS intervention, synchronized cardioversion, and calling emergency services are vital.
The next action to take in this scenario where a 57-year-old woman presents with palpitations, chest discomfort, and tachycardia with a rate of 180/min and diaphoresis, along with low blood pressure of 80/60 mm Hg, would be to consider this as a medical emergency and provide immediate treatment to stabilize the patient's condition. Calling for emergency medical services, initiating ACLS (Advanced Cardiovascular Life Support) protocols, and administering interventions like synchronized cardioversion to address the wide-complex tachycardia would be crucial steps to prevent further deterioration.