Answer:
Negative Feedback LoopsA negative feedback mechanism or loop is a pathway stimulated by the deviation in the output, which causes changes in output to the direction opposite to the initial deviation.The negative feedback mechanism moves the variable factors towards the stable state or homeostasis after the control unit interprets the extent of the deviation.Negative feedback loops are more common than positive ones as they tend to stabilize the system.The loop detects the change in output and acts in the opposite direction to nullify the stimulus causing the change.These loops are activated under two conditions; when the value of the variable is above the normal value and has to be brought down and when the value of the variable is below the normal values and has to be brought up.Negative feedback mechanisms occur as a part of homeostasis to bring the variables back to their normal levels by counteracting the stimulus, causing the deviation in the first place.Like in a positive feedback mechanism, a negative feedback mechanism also contains different components that together help to maintain a stable state.Examples of Negative Feedback Mechanism
1. Regulation of blood glucose level
2. Temperature regulation
Positive Feedback LoopA positive feedback mechanism, as the name suggests, is a pathway that in response to a deviation in the output causes the output to change even more in the direction of the initial deviation.A positive feedback mechanism amplifies the deviations and brings state changes to the output.Positive feedback mechanisms are far less common than negative feedback mechanisms as it moves the body away from homeostasis.The process of positive feedback mechanism progressively amplifies the response as long as the stimulus is continued.The positive feedback loop can consist of either a single component that activates its own activity or several components with direct and indirect interactions.Positive feedback loops in biological processes are often observed in processes that need to occur quickly and towards completion as the output tends to increase the effect of the stimulus.Positive mechanisms are very few within living systems like the human body, but these can also be observed in the ecosystem, like in the case of ripening of fruit.Examples of Positive Feedback Mechanism
1. Menstrual cycle
2. Childbirth
Negative feedback loops are more common than positive ones as they tend to stabilize the system.
Positive Feedback vs Negative Feedback (8 Key Differences)Definition
The positive feedback mechanism is a pathway that in response to a deviation in the output causes the output to change even more in the direction of the initial deviation. A negative feedback mechanism or loop is a pathway stimulated by the deviation in the output, which causes changes in output to the direction opposite to the initial deviation.Effect on the homeostasis
A positive feedback mechanism breaks down the homeostasis system of the body. A negative feedback mechanism works to maintain the conditions of homeostasis in the body.Occurrence
The positive feedback mechanism is less common and occurs in specific situations.The negative feedback mechanism is more common and occurs in different organs and systems in the body.Stability
The positive feedback mechanism is less stable.The negative feedback mechanism is more stable.Effect
In a system with a positive feedback mechanism, the effective input is increased by the addition of actual input with the feedback signal.In a system with a negative feedback mechanism, the effective input is decreased as the feedback signal inhibits the actual input.External interruption
A positive feedback mechanism might require an external interruption.A negative feedback mechanism doesn’t require an external interruption.Changes
Positive loops enhances the change in physiological factors.Negative loops resists changes in physiological factors.Examples
Positive feedback mechanism in nature is observed during childbirth in humans and during the ripening of fruits. The negative feedback mechanism is observed during thermoregulation and maintaining the blood glucose level.How would this food web be affected by the extinction of the Osprey?
Answer:
The fish would grow in the population, because osprey mainly eat fish.
Because of the fish growth, the ocean, pond, or whatever, makes the water have less oxygen. The fish eat small fish, crustaceans, worms and almost anything that is not poisonous to them. These populations will decrease.
Because there are no Ospreys, the raccoons will get hungry too, as they sometimes eat Osprey eggs.
Which of the following is a primary consumer in the food web shown above?
OA. bacteria
B. algae
OC.
lizard
D. grasshopper
Answer:
The answer is D. grasshopper. A primary consumer is one that eats plants.
ASAP Becky made the diagram below to represent ultraviolet rays, radio waves, gamma rays, and infrared rays based on their properties.
Four waves labeled A, B, C, and D are shown. Wave A has the greatest gap between its consecutive peaks and Wave B has the least gap between its consecutive peaks. Wave C has the second greatest gap between consecutive peaks, followed by Wave D.
Which wave best represents ultraviolet rays?
Wave A
Wave B
Wave C
Wave D
The best wave represents ultraviolet rays is Wave B.
Ultraviolet (UV) radiation is a type of non-ionizing radiation that is emitted by the sun and unnatural sources, such as tanning .
How harmful are UV rays?Exposure to UV rays can cause early ageing of the skin and signs of sun harm such as creases , leathery skin, liver bumps, actinic keratosis, and solar elastosis.
UV beams can also generate eye pains. They can force the cornea to become inflamed or ignited.\
Thus, the option "B" is correct, Ultraviolet (UV) radiation is a type of non-ionizing radiation that is emitted by the sun and unnatural sources, such as tanning .
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Answer:
b
Explanation:
How does the structure of each cell facilitate its
function
Answer:
The contents of the cell, or the structures of the cell, allow the cell to be "specialized". Together with the cell's proteins, they allow the cell to do specific things. They allow a cell to act like a neuron or a bone cell or a skin cell.
Explanation:
Which of the following can
conserve energy?
A. crop rotation
B. intercropping
C. drip irrigation
D. recycling newspaper
Answer:
jbbbbbbbbbbb
Explanation:
jjjjjjjjjjjjj
Answer:
B i think
Explanation:
what is the function of the cristae that is found inside the mitochondria
Answer: cristae greatly increase the surface area of the inner membrane on which the above-mentioned reactions may take place. A widely accepted hypothesis for the function of the cristae is that the high surface area allows an increased capacity for ATP
Explanation:
When lions prey on a herd of antelopes, they are able to catch the slowest antelopes first. The faster antelopes escape. Which part of Darwin's concept of natural selection might be used to describe this situation?
traits are inherited.
differential reproduction occurs
No answer text provided.
variation in a population exists
Answer:
variation in a population exists
Explanation:
Variation is present in a population of antelopes so due to this variation, the predator such as lion can catch the slowest antelope that is present in the population while on the other hand, the faster antelopes can save their lives by running very fast. Variation is present in a population of antelopes due to availability of food as well as genetic characteristics. These variation leads to the availability of food to the lions.
what’s the code for UCU AAA CCU GGG UAA
Which of the following is an example of parasitism.
Answer:
I think it is A
Explanation:
A would be my andwer
Suggest two reasons why a person aged 16–49 years might not be using contraception.
Answer and Explanation:
The people within this age range most likely want a baby for themselves/want more babies, or they don't feel like they should have to be limited to the amount of babies they want. Since it is their life and their bodies, they think it is up to them to decide how many to have and whether to have one or not.
#teamtrees #PAW (Plant And Water)
Which type of relationship is formed when an Alcon blue caterpillar lives in a Myrmica ant
nest?
commensal
mutualistic
parasitic
Answer:
mutualistic is the correct answer.A mutualistic relationship is formed when an Alcon blue caterpillar lives in a Myrmica ant nest. Thus, the correct option is B.
What is Mutualistic relationship?A mutualistic relationship is an interaction when two organisms of different species work together in such a way that each species is benefiting from the relationship.
The Caterpillars of the alcon blue butterfly have developed an outer coat on their body that tricks the Myrmica ants into believing that the young are its own, this results into duping the ants to carry the larvae back to their colonies to care for. Once in the nest, the caterpillar becomes a parasite. The Myrmica ants will feed the adopted larvae in preference to their own, and the ant colony will produce fewer offspring in the nest.
Therefore, the correct option is B.
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When a substances like sugar, salt or lemon juice dissolve into a liquid and appears to "disappear", it is no longer present in the solution.
True
False
Answer:
False.
Explanation:
A solvent is the substance that does the dissolving – it dissolves the solute. In salt solution, water is the solvent. During dissolving, particles of solvent collide with particles of solute. They surround the particles of solute, gradually moving them away until the particles are evenly spread through the solvent.
The molecules are still there.
What are the characteristics of manganese?
Answer:
"Manganese is a grey-white, hard and very brittle metal.
It tarnished on exposure to air and oxidized to manganese when heated."
Credits to: Yahoo
Answer:
Manganese is a pinkish-gray, chemically active element. It is a hard metal and is very brittle. It is hard to melt, but easily oxidized. Manganese is reactive when pure, and as a powder it will burn in oxygen, it reacts with water (it rusts like iron) and dissolves in dilute acids.
Explanation:
Meiosis produces four nuclei that have different chromosome numbers
from the parent cell.
True or False
Help please
Answer:
I would say true
Explanation:
they do produce 4 different chromosomes
Answer:
true
Explanation:
the are 23 chromosomes in the daughter cell and 46 in the parent cell
does anyone know any of these answers??!
Answer:
free ponts how kind of you
Explanation:
Hi! I need help, please :)
I WILL GIVE YOU BRAINLYEST!! ANSWER THESE TWO QUESTIONS PLSS!!
Using your own words, can you describe
the meaning of a watershed?
How are groundwater and surface water different?
PLS HELP ME!! And have a great day!
Watershed is like where rainwater gathers to then be drained off into like a pond or river.
Surface Water is just water in like lakes and ponds while ground water is underneath the surface of the Earth.
Best of luck!
Can anyone help me with my biology homework??
Answer:
Phenotype ration of Green : other color plant will be 3:1
Genotype ration would be GG:Gg:gg
1:2:1
Explanation:
Let the dominant allele for green color of plant be G
Recessive allele for the above allele pair would be g let us say that "g" imparts black color
Then the genotype of two heterozygous green plants would be "Gg"
Gg * Gg
GG, Gg, Gg, gg
The three individuals of genotype GG, Gg, Gg will have green color
while the gg individual will have black color (as assumed)
Phenotype ration of Green : other color plant will be 3:1
Genotype ration would be GG:Gg:gg
1:2:1
All of Earth's systems are
A. independent
B. interconnected
C. separated
D. unrelated
Question 4: Suppose there were changes in the habitat that caused this actual value. What might a combination of those changes be?
Answer:
hmmmm check my explanation
Explanation:
it my be from many different mishaps
such as tsunamis, earthquakes, volcanic eruptions and more
Answer:
The amount of precipitation reduces by 20% over time. It will have an impact on the habitat because species that have adapted to drier climates will supplant those that are less suited to the new climate.
Explanation:
What type of scientists uses a dichotomous key?
Answer: biologists are a type of scientist that use dichotomous.
The Type of scientists that uses dichotomous key is : Biologist
A lot of scientists make use of the Dichotomous key for identifying unknown biological organisms like Biologists. A dichotomous key consists of a set of choices, with each choice consisting of two statements, these statements makes it possible to name an unknown biological organism.
A dichotomous key is a simply method used for the identification of organisms ( groups of unknown organisms are repeatedly divided into two groups to get more information about the organism )
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Two equal strips A and B were from a potato whose cell was 30% of sugar. The strip
A was placed in a solution of 10% sugar concentration while B was placed in 50%
sugar concentration
a) What change was expected in strip A and B
b) Account for the change in strip A
Answer:
Movement occurs from higher concentration to lower concentration.
Explanation:
Strip A cell has 30% of sugar which is placed in a solution of 10% sugar so the sugar that is present in the potato strip A moves from inside to the outside due to the process of osmosis while on the other hand, if strip B was placed in 50% of sugar solution so the sugar moves inside from outside environment through semi-permeable membrane. This movement occurs due to difference in concentration of both environments i.e. cell and solution.
Two equal strips A and B were from a potato whose cell was 30% of sugar. strip A was placed in a solution of 10% sugar concentration while B was placed in 50% sugar concentration
a) strip become flaccid and strip B will swell
b) hypotonic solution causes movement of water to diffuse out of cell
Simple diffusionSalts and sugars in solution will diffuse away from areas of high concentration into the surrounding solution
Water also diffuses away from areas of high free water concentration into areas of more solute concentration.here in strip A is placed in low sugar solution that causes movement or diffusion of water from the cell to the solution as it is only 10% sugar concentrationin strip B which is placed in low sugar solution that is placed in high sugar concentration solution that is 50% which means there will be movement of water from solution into the cells of the strip which cause them to swellThus, Two equal strips A and B were from a potato whose cell was 30% of sugar. strip A was placed in a solution of 10% sugar concentration while B was placed in 50% sugar concentration
a) strip become flaccid and strip B will swell
b) hypotonic solution causes movement of water to diffuse out of cell
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Which term do biologists use to describe the average number of individuals of a species per unit area?
A. carrying capacity
B. population density
C. minimal viable population
D. survivability curve
Answer:
B
Explanation:
B
Explanation:
because it deals with the cellection biological data of all organism in environment
Within eukaryotic cells, energy is derived from the breaking down of glucose. What is this process called?
O a. photosynthesis
O b. dehydration synthesis
O c. cellular respiration
O d. transformation
Answer:
C
Explanation:
50 points! Will give Brainliest to the first correct answer!
What was the control in Redi's experiment?
the united states , canada , japan , and england are all examples of ?
1. developed nations
2. developing nations
3. low-income nations
4. middle-income nations
5. transitional nations
1) If you cross a mussel with dark, zebra-striped shells with a mussel with
solid light-colored shells, how many offspring would you expect to
have the daik, zepra-striped shells?
A) 0%
B) 50%
C) 75%
D) 100%
Know how to calculate the amount of chromosomes in mitotic cells and in gamete cells, when given an amount of the chromosome number for one of the two types of cells. For example, a fruit fly has 8 chromosomes or 4 pairs of chromosomes in its wing cells, how many chromosomes will be in each egg cell?
Answer:
4 chromosomes
Explanation:
Meiosis is a kind of cell division that produces daughter cells that already have their chromosome number reduced by half. Due to this reason, meiosis is called a reduction division. A diploid parent cell (2n) will produce gametes with haploid cells (n).
According to this question, a fruit fly has 8 chromosomes or 4 pairs of chromosomes in its wing cells, after undergoing meiotic division, it will possess 4 chromosomes in each gamete cell. Note that the chromosome number has been reduced by half.
which of the following is a potential consequence of soil compaction and loss of soil structure
Answer:
The compaction force may cause the crushing of soil aggregates, which has a negative affect on soil aggregate structure. ... Reduced soil aeration can affect root growth and function, and lead to increased risk of crop disease. All these factors result in increased crop stress and yield loss.
Why is there so much biodiversity on Earth? Provide at least two examples
Answer:
climate and agriculture
Explanation:
for example the coconuts of the pacific warm water islands are far different than the crab apples of the north or how the heat of the south means for less clothes while the brisk of the north requires more layers.
Explanation:
There are several key reasons for high biodervisity in tropical ecosystems. High NPP directly contributes to a diversity by supporting more species with minimum viable populations of each organism increase overall mutation frequency and hence intraspecific genetic varation.