Answer:
pls read this paragraph
Explanation:
Vestigiality is the retention during the process of evolution of genetically determined structures or attributes that have lost some or all of the ancestral function in a given species.[1] Assessment of the vestigiality must generally rely on comparison with homologous features in related species. The emergence of vestigiality occurs by normal evolutionary processes, typically by loss of function of a feature that is no longer subject to positive selection pressures when it loses its value in a changing environment. The feature may be selected against more urgently when its function becomes definitively harmful, but if the lack of the feature provides no advantage, and its presence provides no disadvantage, the feature may not be phased out by natural selection and persist across species.

In humans the vermiform appendix is a vestigial structure; it has lost much of its ancestral function.
Examples of vestigial structures (also called degenerate, atrophied, or rudimentary organs) are the loss of functional wings in island-dwelling birds; the human appendix and vomeronasal organ; and the hindlimbs of the snake and whale.
A quote from Carl Sagan " The history of life can be described as the gradual dominance of brains over genes" WHAT DID HE MEAN BY THIS?
The seven-spotted cockroach is a nocturnal species that burrows under leaf litter during the day.
The pattern on the exoskeleton of the adult seven-spotted cockroach is similar to that of the
carnivorous six-spotted ground beetle. This beetle has the ability to spray a chemical irritant at its
attackers. The mimicry of the ground beetle's pattern helps the seven-spotted cockroach survive
because it
О
A. is more visible at night
o B. can attract more potential mates
C. is less likely to be eaten by a predator
D. can better compete with beetles for food
Answer: C. is less likely to be eaten by a predator.
Explanation:
The adult seven-spotted cockroach is the prey of various other insects including beetles so mimicking the pattern of a beetle would send a message that it is a beetle and because the chemical irritant that the beetle has makes it get avoided by others, the cockroach gets avoided by other insects too who don't want to be sprayed.
Of course this does not always work but it works for the most part and ensures the cockroach's survival.
Hemlocks are a common type of tree in the northern forests of the United States. In studying one forest, a forester noticed that mature hemlocks were abundant but there were very few young hemlocks. She wondered why there were so few young hemlocks. By reading the records that other foresters in that area had kept, she learned that the population of deer living in the forest had doubled in the last five years. By reading studies on forests that other scientists had performed, she also learned that deer in similar forests like to eat young hemlocks and the young trees of other species.
Which statement is a hypothesis that would best address the question, "Are deer eating the young hemlocks and preventing them from growing?"
Deer are eating young hemlocks.
Deer will eat young hemlocks, but not old hemlocks.
If deer are eating young hemlocks, then keeping deer away from the young trees will allow the trees to grow.
If the hemlocks are tasty to the deer, the deer will eat them.
Answer:
It's the third answer, which is the only one written as a proper hypothesis, hope this helps
A scientist is studying the passive movement of a molecule into a cell. He measures the rate at which this chemical moves into the cell, as a function of its external concentration. The chemical's rate of movement is directly proportional to the extracellular concentration but eventually reaches a transport maximum. What type of transport seems to be used by this molecule
Answer:
The correct answer is - facilitated diffusion.
Explanation:
First let's understand about FACILTATED DIFFUSION.
Normally diffusion occurs from higher concentration to lower concentration area, that means, along the concentration gradient.
In the process of FACILTATED DIFFUSION, for a substance to get diffued, it should occur with help of a protein in the membrane. Of course this process occurs with out consuming energy in the form of ATP therefore its a PASSIVE process.
Now lets understand the term TRANSPORT MAXIMUM, here lies the answer of above question.
Transport maximum is a condition when there is no more movement of chemicals/ any particles via mebrane because of SATURATION of available proteins required to transport chemicals across the membrane. As there are no more proteins available to transport chemicals across membrane, diffusion wont takes place anymore untull those proteins are regenerated.
Therefore as mentioned in question that CHEMICAL-A reached transport maximum. This says that it is transported by a process called facilitated diffusion.
What is the dewpoint temperature when the
relative humidity is 30% and the air
temperature is 20°C?
Answer:
Dew Point Temperature: 1.9°C or 35.4°F
The dewpoint temperature when the relative humidity is 30% and the air temperature is 20°C is determined as 2°C.
What is dew point temperature?The dew point temperature is the temperature at which air must be cooled to become saturated with water vapor.
The dew point temperature is calculated as follows;
[tex]N = \frac{[ln(R_H/100) + [\frac{17.27T}{237.3 + T} ]}{17.27} \\\\N = \frac{[ln(30/100) + [\frac{17.27\times 20}{237.3 + 20} ]}{17.27}\\\\N = 0.00807\\\\D = \frac{237.3N}{1-N} \\\\D = \frac{237.3 \times 0.00807}{1-0.00807} \\\\D = 1.93 ^0C \ \approx 2\ ^0C[/tex]
Thus, the dewpoint temperature when the relative humidity is 30% and the air temperature is 20°C is determined as 2°C.
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Please I have so much more to do.
The correct answer is D. Skeletal system.
Explanation
The parathyroid glands are glands of the human endocrine system that are located behind the thyroid glands in the neck. The main function of the parathyroid glands is to control the amount of calcium in the body (mainly bones and blood). According to the above, the parathyroid glands produce essential hormones for the proper function of the bone system because it controls the calcium that is used to strengthen the bones. These at the same time serve as the storage system to ensure that the body always has a vast source of calcium. So the correct answer is the D. Skeletal system.
Explain why water is an excellent solvent for biological systems.
Answer:
Water is capable of dissolving a variety of different substances, which is why it is such a good solvent. And, water is called the "universal solvent" because it dissolves more substances than any other liquid. This allows the water molecule to become attracted to many other different types of molecules.
Explanation:
hope this helps, have a great day
Plz help me well mark brainliest if correct!!...
Answer:
A. Electing the president of a country
Answer:
A) electing the president of a country
Explanation:
A national event is one which concerns an entire country.
The subject of a source can best be described as themain topic or area of concern.most important idea in the text.tendency to view something in a certain way.way the source wants people to feel or think.
Answer:
main topic or area of concern.
Explanation:
An information source can be defined as a system or medium through which informations, knowledge and ideas may be gotten and used by an individual. An information source can either be a primary or secondary source of information. The source options for informations are television, radio, web, newspapers, journals, magazines etc.
The four criteria used to evaluate source options are;
1. Accuracy: the user of this source of information should check if the data presented are accurate and credible. At this point, you should ensure that the informations provided are well researched and cited for verification.
2. Authority: you should endeavor to know who the author and publisher of the information source is. Also, it is important to know their qualifications.
3. Currency: it is necessary to know when the information source was created or produced by the author. Also, the user of this data should verify when it was published (in the case of a book) or if it requires an update (in the case of a website). Hence, the information source should be timely.
4. Objectivity: ensure that the source of information is unbiased, reliable, and should not only contain opinions but facts.
Basically, the subject of a source can best be described as the main topic or area of concern.
An electrocardiogram (ECG) provides information about: Group of answer choices the pressure of blood in the heart chambers the rhythm of heart contractions the speed of blood flow through the blood vessels the amount of oxygen in the blood as it leaves the heart
Answer:
the rhythm of heart contractions.
Explanation:
In Human anatomy, cardiac cycle can be defined as a complete heartbeat of the human heart which comprises of sequential alternating contraction and relaxation of the atria and ventricles, therefore causing blood to flow unidirectionally (one direction) throughout the human body.
Generally, the cardiac cycle occurs in two (2) stages;
1. Diastole : in this stage, the ventricles is relaxed and would be filled with blood.
2. Systole: at this stage, the muscles contracts and thus, allow blood to be pushed through the atria.
An electrocardiogram (ECG) provides information about the rhythm of heart contractions.
Additionally, the right atrioventricular valve (AV) also referred to as the tricuspid valve is located on the right dorsal side of the human heart. The right atrioventricular valve (AV) comprises of three (3) leaflets (flaps) which opens and closes in order to allow for the flow of blood from the right atrium of the human heart to the right ventricle. Also, the right atrioventricular valve is saddled with the responsibility of preventing blood from flowing backward in the mammalian heart.
what is the melting point of solid water
Answer:
The melting point for water is 0 degrees C (32 degrees F).
5. During which month does LA experience the most precipitation? The least?
Los Angeles, United States of America. Los Angeles has dry periods in May, June, July, August and September. On average, January is the most rainy. On average, July has the least rainy days.
what is the process of reproduction between human and animals?
Which of the following statements describes an example of phenotypic plasticity?
A) A yeast cell with a genetic mutation grows into a pink colony on a petri dish, while a cell without the mutation grows into a white colony.
B) Desert locusts with the same genotype develop into solitary or swarming forms depending on the density of individuals in their surroundings.
C) Two stems cut from a single rose plant develop red flowers, despite one being planted in full sun and the other in shade.
D) The common hawk-cuckoo and the shikra are types of birds with similar feather patterns and behaviors despite genetic differences.
Explanation:
A) A yeast cell with a genetic mutation grows into a pink colony on a petri dish, while a cell without the mutation grows into a white colony
How do you think different people’s chromosomes would compare
Answer:
Most humans have 46 chromosomes of approximately the same size and shape. The only major difference between different people's chromosomes can be found in the sex chromosomes. ... A karyotype is a picture showing a cell's chromosomes grouped together in pairs.
Explanation:
While tuning a guitar, you realize one of the strings is not the right thickness. The pitch needs to be higher in order for the guitar to be tuned properly, so you replace the string with the correct version. Thickness is not the only thing that has an effect on pitch. How tightly the strings are stretched is also a factor. This is why guitar strings are attached to knobs that can be tightened or loosened. If, after replacing the string, the pitch is a little too high, how should you turn the knob to make it right?
A. You should turn first one way, then the other.
B. You should turn the knob to loosen the string.
C. You should turn the knob to loosen the string.
D. You should turn the knob to loosen the string.
Explanation:
The answer is c. you should turn the knob to loosen the string.
Helppppppppppppppppp
I believe it's (C). A is DNA which is not enclosed in a nucleus ,as in prokaryotic cells
Plant stems can be ______, ______, thick,______, or _________.
Answer:
Underground stem, Aerial stem, and subaerial stem.
Explanation:
Plant stems can be Underground stem, Aerial stem, and subaerial stem due to its presence and strength of the stem. Underground stem are thick stems that run below the ground surface. e.g rhizome. Aerial stems are thin stems that can not stand erect. Examples include watermelon and strawberry etc. Subaerial stems are very thin stems that do not rise up but grow just above the ground. for example, water plantain, flowering rush etc.
Upon completing the entire quiz, your score will be automatica
1
What is an advantage of automated greenhouse systems
a. They greatly reduce labor costs.
b. They are useful in small greenhouse operations.
c. They lack sophistication.
d. There is no evidence of any advantages.
Select Answer
Answer:
They greatly reduce labor costs.
Is this statement true or false?
Areas with mountains are warmer than other areas at the same latitude.
true
false
Answer:
Places at the same latitude may have very different climates if one is on a coast and one is inland. On the coast, the climate is influenced by warm moist air from the ocean. A coastal climate is usually mild. ... Farther inland, the climate is influenced by cold or hot air from the land.
Explanation:
hope this helps true
false
hope this helps
Which pair shows the number of cells present both before and after
meiosis II?
1 and 2
2 and 4
1 and 4
4 and 4
Two and 4 is a pair shows the number of cells present both before and after meiosis II.
What is meiosis?In sexually reproducing organisms, meiosis is a kind of cell division that results in a reduction in the number of chromosomes in gametes (the sex cells, or egg and sperm).
Body cells in humans are diploid, meaning they have two sets of chromosomes (one from each parent). The egg and sperm that combine during fertilization must be haploid, or having only one set of chromosomes, in order to maintain this state.
Each diploid cell divides twice during meiosis to produce four haploid daughter cells, which are the gametes. Nearly every human cell contains 46 chromosomes, 23 of which come from one of our parents and 23 highly similar chromosomes from the other parent.
Therefore, Two and 4 is a pair shows the number of cells present both before and after meiosis II.
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which choice would most likely reduce the amount of energy resources a person uses
A. shopping with plastic bags rather than reusable bags
B. riding bicycle instead of driving a car
C. drinking bottled water instead of tap water
D. buying new clothes instead of used clothes
What do you know about climate or climate change.
Answer: Climate change describes a change in the climate/ weather.
Explanation: The exact definition,-) Climate change includes both global warming driven by human-induced emissions of greenhouse gases and the resulting large-scale shifts in weather patterns.
The circulatory aids the digestive system by....
A. Moving oxygen around the body
B. Taking nutrients to cells in different parts of the body
C. Creating electrical currents used to move messages around the body
D. Providing support and structure to the body
(I’ll give points + brainalist for the correct answer)
Answer:
Jacksom you wanna zo.o.m?
~Janiyha
What is an advantage of using nuclear power?
A. Nuclear energy is very inexpensive.
O B. Nuclear energy is readily available.
O C. Nuclear power plants produce no greenhouse gases.
D. Nuclear power plants do not produce waste products.
Nuclear power plants produce no greenhouse gases. Therefore, option (C) is correct.
What is nuclear power plant?A nuclear power plant is a facility that generates electricity through the process of nuclear fission, which involves splitting atoms of uranium or plutonium to release energy in the form of heat. This heat is then used to produce steam, which drives a turbine to generate electricity. Nuclear power plants are a type of thermal power plant, which also includes coal-fired and natural gas-fired power plants.
Nuclear power plants are considered a form of low-carbon energy, as they do not produce greenhouse gas emissions during operation. However, they do produce radioactive waste, which is hazardous and requires careful management and disposal. Nuclear power plants also carry the risk of accidents and meltdowns, which can have serious environmental and health consequences. Despite these risks, nuclear power remains an important source of electricity in many countries around the world.
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The rete testis Multiple Choice transports seminal fluid to the efferent ductules. receives sperm from the seminiferous tubules. is a venous network that cools the arterial blood traveling to the testis. is the site of spermiogenesis. is the nerve plexus that supplies the testis.
Answer:
Receives sperm from the seminiferous tubules.
Explanation:
The rete testis is a set of tubules that transport the sperms from the straight seminiferous tubules, the last portion of the seminiferous tubules, to the efferent ducts. Then, the sperms go to the epididymis conduct. From there, they go to the deferent conduct, then to the ejaculatory duct, and lastly to the urethra.
5) Enumere a 2º coluna de acordo com a 1º:
1) Organismo 6) Fatores bióticos
2) População 7) Fatores abióticos
3) Comunidade ecológica 8) Habitat
4) Ecossistema 9) Cadeia alimentar
5) Biosfera 10) Nível trófico
( ) Posição ocupada pelos seres vivos na cadeia alimentar
( ) Nível de organização mais abrangente, constituído por todos os ecossistemas do planeta.
( ) Todos os elementos físico-químicos necessários à manutenção da vida.
( ) Espaço físico onde vive uma determinada espécie.
( ) Todos os seres vivos que pertencem ao ecossistema.
( ) Compreende a(s) comunidade(s) e os componentes não vivos de determinada área geográfica.
( ) Conjunto de organismos de uma mesma espécie que habitam a mesma área geográfica e estabelecem relações entre si.
( ) Também denominada de biota ou biocenose, é constituída de populações que vivem em um mesmo local e interagem entre si.
( ) Sequência linear de seres vivos em que um serve de fonte de alimento para o outro.
( ) Cada ser vivo, seja ele unicelular, como uma ameba, ou pluricelular, como uma árvore.
Answer:
okk
Explanation:
ookok
If having long fur helps a guinea pig survive, what
would you expect to see change in the population
as it evolves?
DONE
In a population with long fur, there will be more guinea pigs than short fur in the given scenario.
What is trait?A trait, as it relates to genetics, is a unique feature of an individual.
If having long fur helps a guinea pig survive, we can expect the long-furred trait to become more common in the population as it evolves.
This is because guinea pigs with long fur would have an advantage in colder environments, allowing them to retain body heat more effectively and survive longer.
As a result, longer-furred guinea pigs are more likely to survive and reproduce, passing on their long-furred trait to their offspring.
As this process continues over many generations, the proportion of guinea pigs with long fur in the population will increase, while the proportion with short fur will decrease.
Thus, this can be expected to see change in the population as it evolves.
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NO LINKS PLEASE, NEED ANSWER ASAP
What will happen to a plant cell placed in distilled water?
The cell will become flaccid due to the cell membrane.
The cell will become turgid due to the cell wall.
The cell will lysis due to the cell membrane.
The cell will burst due to the cell wall.
Answer:
the cell will become turgid due to tge cell wall
Explanation:
when a plant cell is placed in distilled water the water will move in the solution inside the cell is hypertonic to the distilled water serrounding the cell but it will not burst it producr turgor pressure keeping the plant upright
if a plant cell is placed in distilled water, and distilled water has a very low concentration of solutes the cell will become turgid due to the cell wall, hence option B is correct.
How distilled water affect the plant cell?This is because distilled water has a very low concentration of solutes and a high concentration of solvent, making it a hypotonic solution in comparison to the intracellular environment.
To put it another way, we can say that the solute concentration of When a plant cell is placed in distilled water, it becomes turgid.
This is due to the fact that it osmotically absorbs water from the hypotonic distilled water, causing the cytoplasm of the plant cell to enlarge and firmly press up against the cell wall.
Therefore, distilled water has a very low concentration of solutes, so cells will become turgid.
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Which type of base is shown? How can you tell?
Answer:
The correct answer is - purine nitrogenous base (adenine).
Explanation:
The base given in the diagram in the image has two rings attach with the pentose sugar which is attached to the phosphate, which means it is the diagram of nucleotide. In this nucleotide base can be either purine or pyrimidine.
Pyrimidines have a single ring structure, whereas purines have 2 ring structures. Adenine and guanine are purines with two ring structures whereas cytosine and thymine are pyrimidines as they have one ring structure. Adenine contains an amine group on C6, and a double bond between N1 and C6.