Answer:
This question lacks options, options are: A. Allopolyploid speciation B. Behavioral isolation C. Allopatric speciation D. Sympatric speciation E. Adaptive radiation. The correct answer is D.
Explanation:
Sympatric speciation consists of different populations of the same species, occupying the same territory, diversifying due to the appearance of isolation mechanisms that fulfill the same function as geographical barriers (a river, a mountain or a separation of tectonic plates, for example) that makes contact between both populations impossible. Sympatric speciation is a bit more difficult to understand, since a tangible and observable barrier appears in the first instance that makes contact between individuals of the same species and population impossible. In sympatric speciation there may be alleles for a gene that encode more or less successful behaviors in the face of certain events. As this genetic information is heritable from parents to children and, under certain conditions, it can be expected that A2 species end up presenting sufficient behavioral differentiation with respect to A1 to give rise to different species after a long period of time. Both populations will end up exploiting different niches and accumulating very diverse adaptations, giving rise to two different species.
The example shown in the illustration is that of sympatric speciation.
Speciation is generally defined as a biological process that leads to the emergence of new species of organisms in ecosystems.
Speciation can be of 2 types:
Allopatric speciationSympatric speciationIn allopatric speciation, a new species emerge from ancestral species as a result of geographical separation. Thus, genetic flow from the ancestral species and the new species cease to exist.
In sympatric speciation, a new species emerge from ancestral species without any form of geographical barriers between them. Thus, both new and ancestral species coexist in the ecosystem.
In the illustration, a new species emerged from the population of sunflowers and coexist with the ancestral species of the same plant without interbreeding. This ticks all the boxes of sympatric speciation.
More on speciation can be found here: https://brainly.com/question/4493180
Which of the following is a negative consequence of air pollution on people?
A. More crop growth
B. More intense sunlight
C. Less acid rain
D. More lung disease
Living things_______in response to changer in there environment. 1.evolve. 2.fossils. 3.extinct. 4.species. Can some tell me which one it is?
mechanics is that branch of physics and mathematics that...
Answer:
The correct answer is - deals with the motion of an object without or with the reference of force.
Explanation:
The mechanism is the branch of sciences that deals with an object in a motion under the reference force or the object that remains at rest. This branch of physics leads to topics of gravitational force, electricity, quant, or magnetism according to the nature of the forces involved.
Modeling, aerodynamics, and all other applications of mechanics required the use of laws of newton, the formula of mathematics, and algebra.
“Scientist have long understood how nutrients move from the oceans surface to its depths. As phytoplankton die, they sink and collect on the ocean floor. But if nutrients are continually sinking to the depths of the ocean, how are surface waters replenished with nutrients? Scientist discovered that in certain regions of the ocean, the nutrients-rich deep water was upwelling, or rising to the surface”
which phrase from the paragraph helps you to understand that ocean health involves steady restoration
Answer:
"As phytoplankton die,they sink and collect on the ocean floor"......."scientist discover that in certain regions of the ocean the nutrients deep water was rising to the surface"
Explanation:
this shows steady restoration of ocean nutrients
As seen that the death of planktons lead to uprise in oceanic nutrients .the cycle just keeps going on and on
its quite self explanatory
Help me please it’s do 10 minutes
In one page compare and contrast the processes of aerobic and anaerobic respiration.
Use your final answer in teguency to compute and solve the peod of waved. Use the back
page of module for your solution in FREQUENCY and write your answers below for your
computation of PERIOD OF WAVE. Use the formula given,
......1
T= -
......f
Answer:
ওয়েভের পড গণনা এবং সমাধান করতে টেলিগ্রাসে আপনার চূড়ান্ত উত্তরটি ব্যবহার করুন। পিছনে ব্যবহার করুন
মডিউল পৃষ্ঠা
4. Which of the following are common to all of the
chemical cycles? Select all correct answers.
a. reservoirs and processes
b.an atmospheric component
c. photosynthesis and respiration
d. living things as a reservoir
e. the sun as a source of energy
f.can be affected by human activities
d. living things as a reservoir
e. the sun as a source of energy
f. can be affected by human activities
Common elements to all of the chemical cyclesLiving things as a reservoir, the sun as a source of energy and human activities are the common elements present to all of the chemical cycles. These factors causes direct impact on the chemical cycle so we can conclude that option d, e and f are the correct statements.
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PLZ help I need the answer today!!!
Answer:
I think it's because the electricity from the battery goes through one light bulb and into the other and back to the battery since there is only one circuit and when one of the light bulbs burn out it stops the circulation of electricity causing the other one not to work too?
What the answer there are no options
You transform a population of cells with a transgene and isolate a cell line that has integrated the gene into its genome, but in which the gene is not expressed. Speculate as to what may be preventing the gene from being expressed. Describe two ways to test this possibility.
Answer:
The transgene could be silenced by: 1- epigenetic mechanisms (e.g., DNA methylation, histone deacetylation, etc.), and 2-the RNA interference (RNAi) pathway
Explanation:
Epigenetics refers to the heritable changes caused by the activation and deactivation of genes without changing the DNA sequence. Epigenetic mechanisms include 1-DNA methylation on cytosine residues, and 2-modifications on amino acids in the tails of histone proteins (e.g., methylation, acetylation, ribosylation, phosphorylation, etc). These two epigenetic mechanisms can modify DNA structure and thus alter the accessibility of transcription factors, thereby suppressing gene/transgene expression. Moreover, the RNA interference pathway (RNAi) is a naturally occurring mechanism capable of suppressing gene/transgene expression both at transcriptional and post-transcriptional levels. The RNAi mechanism is triggered by regulatory non-coding RNAs (ncRNAs) such as, among others, long non-coding RNAs (lncRNAs) and small ncRNAs (e.g., miRNAs, piRNAs, siRNAs, etc). In this case, for example, DNA methylation on promoter sequences could suppress transgene expression, thereby methods to measure DNA methylation can be used to test this possibility (e.g., bisulfite genomic sequencing). Moreover, miRNAs that bind to the messenger RNA of the transgene could also inhibit its expression by triggering the RNAi pathway (e.g., mRNA degradation), thereby methods to measure mRNA levels can be used to test this possibility (e.g., RT-PCR).
The table above shows the nutritional information in a bottle of pop. Drinking 16 oz of this beverage would provide which of the following?
A.
30% of the total carbohydrates for a person on a 1,000 calorie diet
B.
15% of the total carbohydrates for a person on a 2,000 calorie diet
C.
15% of the total carbohydrates for a person on a 1,000 diet
D.
30% of the total carbohydrates for a person on a 2,000 calorie diet
Answer:
30% of the total carbohydrates for a person on a 2,000 calorie diet
Explanation:
Study Island
30% of the total carbohydrates for a person on a 2,000 calorie diet will provide if drinking 16 oz of this beverage.
How is 30% 15% in the given table?The table is based on 2000 calories, and one serving is 8 oz.
Thus the question is for two servings.
Which equals 30% carb of a 2k calorie diet.
What are carbohydrates?Carbohydrates are macronutrients that provide energy to our bodies in three ways.Carbohydrate-containing foods are converted into glucose or blood sugar by the digestive system during the digestion process.Thus, we can conclude that option D is the correct option, 30% of the total carbohydrates for a person on a 2,000 calorie diet.
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3. The human body has devised an excellent method to keep the body pH under control. a. What principle underlies the constant pH of human blood, and how does the blood achieve this
EASY! Please I need help, I will give brainliest.
Question on the image below
HELP ME PLZZZZZZZZZZZZ Clark decides to measure the volume of a rock he found outside. He fills a graduated cylinder with water to 30mL. Places the rock into the water and the water level rises to 37mL. What is the volume of the rock?
Answer:
The correct answer is - 7 cc or ml.
Explanation:
Given:
The volume of water in a graduated cylinder = 30 mL
The volume of rock = ?
Final volume = 37 ml
Formula:
If an object is placed in water, then the amount of water that is displaced or increased by submerging the object is equal to the volume of the object.
Vi + Vo = Vf
Vi = initial volume
Vo = volume of object
Vf = final volume
Solution:
Placing the values in formula -
30 + Vo = 37
Vo = 37 - 30
Vo = 7 ml or cc.
Are mules an example of speciation? Why or why not?
Answer:
Hybrids are the offspring of two species. A mule is the hybrid offspring of a female horse and male donkey. Because mules are sterile, they are not classified as a distinct species. The biological species concept connects the idea of a species to the process of evolution.
Question in image below
Answer:
AA
Explanation:
This means the same and AA is the same
Answer:
Aa
Explanation:
Help please.
Potatoes are specialized stems called tubers. Potato tubers have two functions. (1) These thick terms are used to store food. (2) The eyes on the stems, seen here, are used to
A) absorb water.
B) grow new plants.
C) make more sugar.
D) collect oxygen for respiration.
Answer:
B, grow new plants
Explanation:
They are not actual eyes, new potatoes grow out from the potato "eyes".
(Psychology)
An adult vervent monkey sees a Jaguar approaching. He cries out loudly, warning all the other vervent monkeys in the area of danger.
Why is this behavior considered altruistic?
A) The monkey will gain social praise for its behavior.
B) The monkey is putting itself at risk for other individuals.
C) The monkey understands that the Jaguar is not a threat.
D) The monkey does not believe others can help spread a warning.
Answer:
The monkey is putting itself at risk for other individuals.
Explanation:
The behavior of the monkey is altruistic because the monkey is putting itself at risk for the safety other individuals.
What is an altruistic behavior?An altruistic behavior is one in which the individual put a the benefits of others above his own benefit.
An altruistuc behavior is an example of selflessness.
The monkey is exhibiting altruistic behavior by putting itself in danger in order to warn others about the jaguar.
Therefore, the behavior of the monkey is altruistic because the monkey is putting itself at risk for other individuals.
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describe the roles of membranes in an amoeba?
Answer: cell membrane - the thin layer of protein and fat that surrounds the amoeba; it allows some substances to pass into the cell, and blocks other substances.
Explanation:
Answer:
The plasma membrane of a cell is a network of lipids and proteins that forms the boundary between a cell's contents and the outside of the cell.
Explanation:
which type of fingerprint is shown below? (attachment)
Explanation:
this is whorl fingerprint
The student's results are shown in Fig. 5.2.
ASSIGNMENT - 2021
100
90
80
70
60
time for colour
change
50
7 minutes
40
30
20
10
0+
0
20
40
60
80
100
120
distance from lamp /cm
Fig. 5.2
Describe and explain how the rate of photosynthesis is affected by light intensity
Answer:
it is changed because the more light that a plant revives is the more energy they haveg In the mid-1800s, overhunting of Northern Elephant Seals reduced their population size to fewer than 40 individuals. However, the population has since rebounded to over 100,000 animals. The population went through a _________, which makes it more susceptible to ___________.
Answer:
In the mid-1800s, over-hunting of Northern Elephant Seals reduced their population size to fewer than 40 individuals. However, the population has since rebounded to over 100,000 animals. The population went through a _bottle neck event (genetic drift)_, which makes it more susceptible to _developing a genetic disease_.
Explanation:
Genetic drift is the random change that occurs in the allelic frequency of a population through generations. The magnitude of this change is inversely related to the size of the original population. These changes produced by genetic drift accumulate in time. Eventually, some alleles get lost, while some others might set. Genetic drift affects a population and reduces its size dramatically due to a disaster or pressure-bottleneck effect- or because of a population split -founder effect- . The bottleneck effect most likely affects smaller populations.
In the exposed example, extensive hunting acted as a pressure that reduced the number of Northern elephant seals to fewer than 100. This population experienced one or many generations of small size since these animals were affected by hunting. As the survivors did not have the whole genetic pool of the original population, the population size might have recovered to a current population size of 100,000 individuals, but the genetic pool might have not. When the small population increases in size, it will have a genetically different composition from the original one. In these situations, there is a reduced genetic variability, with a possibility of developing a peculiar allelic component. If the survivors in the population carried or developed a mutation, probably this mutation passed from generation to generation. It will involve more individuals each time and increase the probability of developing a genetic disease.
Question on the image below! Help please
In a good experimental design, the part of the experiment that is intentionally changed is the
A dependent variable.
B independent variable.
C constant
D control
Constants never change.
Controls typically don't change or they are done by standard means
(like in an experiment where you water plants with sodas, the plant you use water with is the control)
Dependent variables are the outcome of the experiment. This is the result of changing something.
Independent variables are what you are testing. A independent variable is something that is intentionally altered.
easy way to remember it is that dependent variables depend on what other variables are. so you cant change a dependent variable, but you can change the other variables.
How does a wind turbine produce electricity?
A. It releases kinetic energy to the wind.
B .It releases potential energy to the wind.
C. It converts the wind’s kinetic energy to mechanical energy.
D. It converts the wind’s potential energy to mechanical energy.
Answer: D
Explanation: Wind turbines generate energy by moving. (Kinetic energy is movement.) Wind turbines, in more detail, are pushed by the wind which causes a transfer of kinetic energy which is then converted by the turbine into electrical energy.
What’s the best course of action for the person shown below?
A. Start sweating
B. Start exercising
C.drink water
D.remove jacket
Answer:
c
Expclanation:
Melanie is asked to list the complementary base pairings of a DNA sample in her lab. What is the MOST appropriate response she can give?
ST, RJ, CO, DI, SE
RFLP and PCR
chromosomes and genes
AT, CG, CG, AT, CG
Answer:
AT, CG, CG, AT, CG
Explanation:
Hi, the answer is the last one, AT, CG, CG, AT, CG.
When we read the question, it says base pairings of a DNA sample in her lab. The only base pairs in DNA is A, T, C, and G.
A is complementary to T, and C is complementary to G.
Therefore, you can eliminate the first three.
Hope this helps you!
PLEASE HELP QUICK!!!
What does mRNA do?
A. Carries copies of instructions to make proteins from the DNA to the rest of the cell
B. Creates proteins on the
ribosome
C. Transfers amino acids to the ribosome during protein synthesis
D. Carries amino acids to the growing polypeptide chain on the ribosome
A. mRNA carries copies of instruction to make proteins from the DNA to the rest of the cell.
mRNA is transcribed from DNA, then translated by the ribosomes into a polypeptide chain (protein)