Which is the central element for all living things?
carbon
hydrogen
oxygen
nitrogen
Answers
Answer:
What is carbon
Explanation:
The Chemical Basis for Life. Carbon is the most important element to living things because it can form many different kinds of bonds and form essential compounds.
Carbon is the only element that makes up every living thing.
Related Questions
Explain one difference between socialism and capitalism.(1 point)
Socialism allocates most of the wealth to the ruling class, whereas capitalism leads to an even distribution of income.
Socialism focuses on the greater good of the community as a whole, whereas capitalism relies on the idea of self-interest to drive the economy.
Socialism refers to the way in which the government operates, whereas capitalism refers to the way in which the economy operates.
Socialism focuses on private ownership of the inputs used in the production of goods or services, whereas capitalism focuses on public ownership of these inputs.
Answers
Socialism focuses on the greater good of the community as a whole, whereas capitalism relies on the idea of self-interest to drive the economy.
What is capitalism?The term capitalism refers to a system in which the means of production is owned by individuals while in socialism, the means of production is collectively owned by the members of the society.
The major difference between socialism and capitalism is that; "socialism focuses on the greater good of the community as a whole, whereas capitalism relies on the idea of self-interest to drive the economy."
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Which of the following describes fossil evidence that supports biological evolution?
Fossils of an unknown species found in isolation from any other species
Fossils of an unknown species that is an intermediate form of two other species
Fossils of different species found within the same geographic area
Fossils of the same species found in a variety of geographic regions
Answers
Answer:
Fossils document the existence of now-extinct species, showing that different organisms have lived on Earth during different periods of the planet's history. They can also help scientists reconstruct the evolutionary histories of present-day species.
3. can you determine the frequency of a particular allele of a diploid species in a population if the number of homozygous dominant, heterozygous and homozygous recessive individuals is given
Answers
The number of times the allele of interest is observed in a population is divided by the total number of copies of all the alleles at that particular genetic locus in the population to compute the allele frequency. The frequency of alleles can be expressed as a decimal, a percentage, or a fraction.
Being homozygous for a gene means you inherited two identical copies. It is the inverse of a heterozygous genotype, in which the alleles differ. People who have recessive features, like blue eyes or red hair, are always homozygous for that gene.
The number of individuals who are heterozygous. The frequency of heterozygous people is equivalent to 2pq.
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the ability of certain specifically shaped molecules to attach to a cell is primarily determined by the...
1. Receptor molecules in the cell membrane
2. Amount of DNA in a cell
3. The cytoplasm of the cell
4. Concentration of salts outside the cell
Answers
Answer:
3
Explanation:
The ability of certain specifically shaped molecules to attach to a cell is
primarily determined by the cytoplasm of the cell
Organisms have structures which are known as intracellular receptors
which are found in the cytoplasm of cells .
These receptors help in the binding of molecules such as protein which are
useful by the cells for synthesis and other metabolic processes required for optimal functioning.
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While you are engaged in sustained aerobic exercise there is feedforward regulation of your arterial baroreceptors, such that their firing rate is much lower at any given MAP than it would be while you are at rest. Why does this make sense
Answers
During sustained aerobic exercise, there is an increased demand for oxygen and nutrients by the working muscles. To meet this increased demand, the heart needs to pump more blood and at a faster rate, resulting in an increase in mean arterial pressure (MAP).
Arterial baroreceptors are specialized sensory receptors located in the walls of certain arteries, such as the carotid sinus and aortic arch. They respond to changes in arterial pressure by increasing or decreasing their firing rate, which is transmitted to the brainstem and influences the activity of the autonomic nervous system.
In the case of sustained aerobic exercise, the body anticipates the need for increased blood flow to the muscles and initiates a feedforward response to reduce the sensitivity of the arterial baroreceptors. This reduces the magnitude of their firing rate in response to the increased MAP, allowing for a greater increase in blood flow to the muscles without triggering a reflexive decrease in heart rate or vasodilation.
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Complete Question
While you are engaged in sustained aerobic exercise there is feedforward regulation of your arterial baroreceptors, such that their firing rate is much lower at any given MAP than it would be while you are at rest. Why does this make sense ?
Where on the planet would you receive more direct sunlight?
A) locations in the mid-latitudes
B) at the North Pole
C) at the South Pole
D) places near the Equator
Answers
Answer:
D. places near the equator
the sun rotates in the equator and it’s always the hottest near the equator so yeah.
The condition of muscle fatigue is best explained by: Question 1 options: insufficient intracellular quantities of ATP due to excessive consumption the inability to generate sufficient quantities of ATP due to feedback regulation of synthesis the all or none law lack of intracellular calcium
Answers
Answer:
The correct answer is ''insufficient intracellular quantities of ATP due to excessive consumption''
Explanation:
The energy source for the muscle to contract efficiently is adenosine triphosphate (ATP). When ATP is metabolized, energy is obtained. Under normal conditions, the muscle has a sufficient energy reserve to support a limited time of maximum activity. When this reserve is depleted, the body activates other metabolic pathways to achieve more ATP. Glucose is activated first, then carbohydrates, and last - only if the exercise is prolonged - lipids (fats). The muscle, therefore, ends up transforming this ATP into the necessary energy.Whether our body uses more fat or more glucose / glycogen as fuel will depend, above all, on the intensity and duration of physical exercise. The body uses more fat the more gentle and prolonged the exercise; while, the more intense the sport, the more important the need for glycogen will be.Muscle fatigue is the inability or lack of strength to continue doing a certain activity. It happens when the muscles are not strong enough to continue. Specifically, when carrying out a physical activity, the active muscle requires oxygen and energy reserves of glycogen; When the intensity of the activity is increased, this need for oxygen increases, exceeding the levels that the transport system is capable of providing.This situation leads to the active muscle looking for another source of energy, increasing lactic acid which, in turn, it develops a metabolic acidosis that can lead to the breakdown of muscle fiber. ATP is obtained from the oxidative degradation of metabolic substrates such as muscle glycogen, serum glucose, free fatty acids originating from muscles or adipose tissue, being characteristic of muscle fiber, the consumption of ATP, and the production of ADP and Pi, much faster than it regenerates.
what is some sun bears facts
Answers
Answer:
Bears are extraordinarily intelligent animals. ...
Bears grieve deeply for others. ...
Bears have excellent senses of smell, sight and hearing. ...
Some species of Asiatic bear build nests in the trees. ...
Bears care deeply about family members.
Explanation: Grizzly bears possess a bite force of over 1200 PSI, which is enough to crush a bowling ball, or an iron skillet.
Two strands of DNA produced during replication are copies of each other.
This is because what is true about each strand in the double helix?
Question 4 options:
they are continuous
they are complementary
they are connected
they are identical
Answers
Answer: They are complementary
Explanation:
Essentially, two strands of DNA are complementary means that the bases are arranged along the molecule such that the chains fit together tightly so as to be lightly secured by hydrogen bonds
Answer:
B
Explanation:
They are complementary
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What is jin wang's response to finding wei-chen and amelia locked in the biology lab closet?
Answers
Jin Wang's answer to discovering Wei-Chen and Amelia imprisoned in the biology lab closet is to ask Amelia out.
Although Jin Wang is the protagonist of this book, the story of the Monkey King truly opens it. The focus of the book then switches to Jin's narrative in chapter two and to Danny (Jin's alter ego) in chapter three. After hearing Jin and Danny's tales, we return to the Monkey King and repeat the cycle twice more. Jin Wang struggled with American Born Chinese because he felt rejected because of his race.
Therefore, the correct option is C.
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Your question is incomplete, most probably the complete question is:
What is Jin Wang's response to finding Wei-Chen and Amelia locked in the
biology lab closet?
OA. He beats up Wei-Chen.
OB. He gets his hair permed.
OC. He asks Amelia out.
OD. He switches schools.
Which of the following shows natural selection?Select one:a.A horse's parents were racers. The fastest horses are bred to produce the fastest offspring.b.Some tuna live in the Pacific Ocean. They are fast swimmers so they are likely to survive and pass on their genes.c.Some trees produce apples for baking. Seeds from the largest apples are kept to produce the next generation of trees.d.Certain rabbits are raised for fur. Rabbits with soft fur are bred with other rabbits with soft fur. They eat grain and vegetables.
Answers
Natural selection is the process in which some organisms that show better adaptation to the environment are more likely to produce an offspring. In the case of the exercise, the answer is:
b. Some tuna live in the Pacific Ocean. They are fast, so they are likely to survive and pass on their genes.
It means that as they are better adapted to that environment due to the fact they are fast swimmers, they are likely not only to survive, but to pass their genes and produce offsprings.
A scientist crosses two flies: one is heterozygous for two genes and has red eyes and long bristles. One has brown eyes and is heterozygous for long bristles.
Cross a red eyed long bristled male fly with a brown eyed long bristled female fly and answer the questions.
Allele notation:
R=red
r=brown
L=long
l=short
__ red, long
__ red, short
__ brown, long
__ brown short
Answers
Answer:
I did the quiz too
Explanation:
25%
25%
50%
0%
Fossil fuels were created from plants and other organisms that lived millions of years ago. Their remains were trapped deep underground.
Ture or False
Answers
Answer:
true
Explanation:
plant matter is mostly carbon so the more plant based carbon in a area the greater the chance for a coal deposit animals and reptiles are more liquid based there for they become sludge like oil and natural gas
The interlobular veins are parallel and travel alongside the ______. multiple choice question.
Answers
The interlobular veins are parallel and travel alongside the interlobular arteries.
Where are interlobular veins?
The stellate veins combine to produce the interlobular veins, which go inward between the rays, take branches from the plexuses surrounding the convoluted tubules, and eventually join the venae rectae near the bases of the renal pyramids. Diagram of the vascular supply to the renal tubule.
Along with the interlobular arteries, interlobular veins draw venous blood from the cortex's capillary plexus. The medulla's venous return travels to the arcuate veins, as was already mentioned. The interlobar veins get blood from arc-shaped veins.
Arcuate arteries give way to interlobular arteries, which then climb into the cortex and split into afferent arterioles that feed blood to the glomerular capillaries. The glomerular capillaries reconstruct into a second arteriolar network, the efferent arterioles, after passing through the renal corpuscle.
The interlobular arteries run parallel to and next to the interlobular veins.
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Tsunamis are so destructive because of their ___ and ___.
size, speed
density, size
speed, shape
Answers
Answer:
A. Size and Speed
Explanation:
:)
Which of the following is most likely to cause a change in only one amino acid?
O Frameshift mutation
Answers
Answer:
point mutation
Explanation:
point mutation will result in the change of a single base in the DNA sequence, which results in a change in only one of the amino acids being produced
how does a jellyfish know when to sting? how does it respond when using the phagocytic cells?
Answers
a. A jellyfish know when to sting if a jellyfish feels threatened or comes into contact with its prey, the nerve impulses that trigger the nematocysts to fire are activated.
b. The jellyfish uses the phagocytic cells in response to the stimuli, that line its tentacles to capture and engulf its prey.
The phagocytic cells are specialized cells that help jellyfish capture and consume their prey. These cells, which are also known as cnidocytes, are located on the surface of the tentacles. They contain a specialized organelle called the nematocyst, which is the structure that injects venom into the target.
When a jellyfish touches a prey item, it triggers a stimulus that causes the phagocytic cells to activate the nematocysts. The nematocyst then fires, injecting the venom into the prey. After the venom is injected, the phagocytic cells engulf the prey and digest it using enzymes.
Jellyfish stinging is also a defence mechanism that they use to ward off predators. They can sense predators using their sensory structures, and they respond by firing their nematocysts, releasing the venom into their attacker.
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5. What are two main things that are unique to the Troposphere?
A)people live in this layer and the weather occurs here
B)meteors burn up and it's the coldest layer
C)the International Space Station Orbits in this layer and it has the highest
temperatures
D)none of the above
Answers
Answer:
The two main things are:
A) people live in this layer and the weather occurs here
B) meteors burn up and it's the coldest layer
Explain the movement of ribs during inhalation and exhalation.
Answers
Answer:
Inspiration (breathing in)
The diaphragm contracts and moves downwards. The intercostal muscles contract and move the ribs upwards and outwards. This increases the size of the chest and decreases the air pressure inside it which sucks air into the lungs. During normal breathing, the major inspiratory muscles produce rib cage expansion and a downward movement of the diaphragm. These movements cause the pressure around and in the lung to become negative (relative to atmospheric pressure).
Explanation:
Explanation:
During normal breathing, contraction of the major inspiratory muscle, the diaphragm, produces both rib cage expansion and a downward movement of the diaphragm. These movements cause the pressure around and in the lung to become negative relative to atmosphere.
When many plants grow in a crowded space where resources may not be sufficient to support all of them, some plants may die from a lack of
sunlight, water, or nutrients.
ООО
Competition
Mutualism
Predation
Parasitism
Answers
Answer:
Competition
Explanation:
The plants are competing against each other for the resources they need for survival. The other three answers involve different plants interacting with each other and the question does not mention interactions between them, meaning it's basically referring to survival of the fittest.
PLSSSS HELP!!! 25 POINTS + BRAINLY
Answers
Answer:
#3
Explanation:
The nucleotide insertion changes the reading frame, causing all kinds of problems. Almost none of the codons will code for the same amino acid.
Does a community include abiotic features? Explain.
Answers
what is the name of semi-permeable membrane which encloses the cytoplasm and all of the cellular organelles?
Answers
The semi-permeable membrane that encloses the cytoplasm and all of the cellular organelles is called the plasma membrane.
The semi-permeable membrane which encloses the cytoplasm and all of the cellular organelles is called the Plasma Membrane. This membrane is made up of two layers of phospholipids, which form a lipid bilayer. The phospholipids have a hydrophilic (water-loving) head and a hydrophobic (water-fearing) tail, which ensures that the membrane is impermeable to large molecules, such as proteins and sugars. In addition, the membrane contains various proteins and carbohydrates which give it a variety of functions. These proteins act as receptors for molecules, allowing them to move into and out of the cell, and as enzymes that catalyze reactions. Additionally, the carbohydrates on the outer surface of the membrane help to identify the cell and enable it to recognize other cells. The plasma membrane also contains cholesterol, which helps to maintain its fluidity and stability.
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The current population of a threatened animal species is 1.6 million, but it is declining with a half-life of 20 years. How many animals will be left in 40 years? in 65 years? The population after 40 years will be animals. (Round to the nearest whole number as needed.) The population after 65 years will be animals. (Round to the nearest whole number as needed.)
Answers
The population after 40 years will be 400,000 animals, and the population after 65 years will be approximately 336,000 animals.
To determine the population after a certain time period, we can use the formula for exponential decay;
N(t) = N0 × \((1/2)^{(t/T)}\)
Where;
N(t) is the population at time t
N0 is the initial population
t is the time elapsed
T is the half-life of the population
Given;
N0 = 1.6 million
T = 20 years
Let's calculate the population after 40 years;
N(40) = 1.6 million × \(1/2^{(65/20)}\)
= 1.6 million × (1/2)²
= 1.6 million × (1/4)
= 400,000
Therefore, the population after 40 years will be 400,000 animals.
Now, let's calculate the population after 65 years;
N(65) = 1.6 million × \((1/2)^{(65/20)}\)
= 1.6 million × \((1/2)^{(13/4)}\)
≈ 1.6 million × 0.210
≈ 336,000
Therefore, the population after 65 years will be approximately 336,000 animals.
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An ecology student has been working on Isle Royale. Over the 5 years that this student has been studying the wolves and moose on this island, the wolf population has been decreasing dramatically. During this time, what can this student predict about the moose population in the next 5 years
Answers
If the wolf population has been decreasing dramatically over the 5 years that an ecology student has been studying wolves and moose on Isle Royale, then the student can predict that the moose population will most likely increase dramatically in the next 5 years.
Isle Royale is a remote island located in Lake Superior, near Michigan and Ontario. It has a rugged terrain, boreal forest, and several lakes. The island is well-known for its ecosystem, particularly the wolves and moose that inhabit it. There is a unique and interesting predator-prey relationship between the wolves and moose on Isle Royale, which has been studied for decades.
Researchers have been observing and recording the changes in the populations of wolves and moose on the island for a long time. During the 5 years that the ecology student has been studying wolves and moose on Isle Royale, the wolf population has been decreasing dramatically. This is most likely due to inbreeding, disease, and lack of genetic diversity.
When a predator population declines, it usually has an impact on the prey population. In this case, it means that the moose population is most likely going to increase dramatically in the next 5 years because there will be fewer wolves to hunt them. This increase in the moose population could cause a chain reaction in the ecosystem, affecting other species and changing the food chain dynamics.
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How might an environment different from the one you experienced have affected the development of personality characteristics that you believe you inherited from one or both of your parents?
Answers
Answer:
The environment has a great impact on our behavior and personality traits which were believed to be inherited from the parents.
Explanation:
Each of the parents contributes 50% of the offspring DNA, and your inherited genetic makeup may have an impact on your personality. It is frequently asserted that our environment has a greater influence on our personality than our genetics. The adaptability of our capacities, cognitive abilities, and social interests accounts for a large part of our personality. Only via our interactions with our surroundings can we gain the flexibility that forms us.
Yes, our genes are passed down to us, yet it has been proposed that they have no bearing on our behavior.
As a result, a kid is born into a situation that prompts them to react as specified in birth order stereotypes, and therefore our personality has been shaped by our surroundings. However, there is little scientific evidence to back up this theory, therefore it's possible that personality is determined by genetics.
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Use the internet to find out more about kidney machines and kidney transplants . how is the donor's kidney tested to see whether it is suitable? why is rejection of the new kidney a problem and how is it dealt with?
Answers
Answer:
The kidney is tested to see whether it is suitable for donation by checking for diseases and conditions that could make it unsuitable for transplantation.
The rejection of the new kidney is a problem because it is not able to remove waste from the blood properly. The nephrons inside the kidney are not able to filter the blood properly and the waste accumulates in the body. The body then has to find a way to remove the waste and this can be done through dialysis or a transplant.
Explanation:
After studying the Earth's spheres, Jamal became interested in the hydrosphere and decided to investigate it further. He began to study the
hydrosphere's interactions with other spheres.
What is the relationship between the hydrosphere and the cryosphere?
Answers
Explanation:
A cryosphere is just a hydrosphere but it's frozen in some way. glaciers, ice caps, and icebergs are cryospheres (frozen bodies of water).
How many previous mass extinctions do scientists have
evidence for from the fossil record?
Answers
Which sympathetic pathway is responsible for activating the esophagus, heart, lungs, and thoracic blood vessels
Answers
The postganglionic sympathetic nerve pathway; option(c), is responsible for activating the esophagus, heart, lungs, and thoracic blood vessels.
What is the pathway of the sympathetic nervous system?Preganglionic neurons found in the intermediolateral columns of the spinal cord, from the thoracic to mid-lumbar levels, are the exit points for sympathetic pathways from the central nervous system.
Postganglionic neurons connect with preganglionic axons at the sympathetic chain ganglia. After exiting the sympathetic chain ganglia through a gray ramus communicans (unmyelinated axons), the postganglionic neuron rejoins the spinal nerve and travels to the skin and blood vessels all over the body.
An inhibitory input to the smooth muscle in the body of the bladder, an excitatory input to the smooth muscle in the urethra, and an inhibitory and facilitatory input to the vesical parasympathetic ganglia are all provided by sympathetic postganglionic nerves that produce norepinephrine.
The complete question is:
Which sympathetic pathway is responsible for activating the esophagus, heart, lungs, and thoracic blood vessels?
A. Splanchnic nerve pathway
B. Adrenal medulla pathway
C. Postganglionic sympathetic nerve pathway
D. Spinal nerve pathway
E. None of the choices is correct.
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