What effect did the human population have on Easter Island? How did they change the island's natural cycling of matter and energy?
Answer:
The population history of the island remains highly controversial. In addition to internal conflict, the population crash has been attributed to “ecocide,” in which the Island's resources were exhausted by its inhabitants, reducing its ability to support human life.
Explanation:
Europeans was known to discovered Easter Island in 1722 and it's name was given by Captain Admiral Jacob Roggeveen.
The human population growth had a negative effect on the Easter Island.
The ecocide hypothesis is the one explanation to how the human population increased exponentially since its colonization and as such
Human populations did over increased the carrying capacity of the Island to support sustainable crops, and in consequence, the island was severely deforested.
The island's natural cycling of matter and energy also reduced or change and as such the people fought among themselves for scarce resources of the island. They had little food and were starving and they resorted to cannibalism.
The island was also plaque by blackbirding from 1862 to 1863.
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A scientist wants to examine a genetic disease in humans. The scientist hypothesizes that the disease can be treated by using gene therapy. Humans take a long time to reproduce and develop, so the scientist will have to
give up on testing the hypothesis.
test the hypothesis for a very long time.
develop new methods to test the hypothesis.
find a way to make humans reproduce faster.
Answer:
answer is B
Explanation:
its on edg
Answer: C. develop new methods to test the hypothesis.
Explanation:
What kind of mutation would occur if a sequence of DNA is changed from ATCGGCTTAACG to ATCGGCTAAACG?
Answer:
Base substitution mutation
Explanation:
Mutation is the alteration or change that occurs to the sequence of a gene caused by a mutagen (chemicals) or spontaneously-induced. Depending on how the mutation occurs, it is of different types. The mutation shown in this question is as follows:
ATCGGCTTAACG to ATCGGCTAAACG
This type of mutation is called SUBSTITUTION MUTATION. Substitution mutation is a type of mutation that involves the replacement of one or more nucleotide base by another. In this original sequence; ATCGGCTTAACG, the eight base T was replaced by base A in the sequence, hence, it is a substitution mutation.
Select the correct answer.
Ships accidentally spread a species of sea urchins to an area of the sea in which they previously didn’t live. The graph depicts the growth trend of native seaweed, a common food for sea urchins, after this invasion. What could ecologists do to curb the trend in the seaweed population?
A.
Eliminate the sea urchins’ competitor.
B.
Introduce more sea urchins.
C.
Introduce a competitor for seaweed.
D.
Introduce a predator for invasive sea urchins.
Answer:
D!
Explanation:
Introducing a predator to kill the sea urchins will lower their population and/or make them move away from the area they invaded
The relationship between a carnivore and an herbivore can be stated as
A
parasite and host
B
predator and prey
C
prey and predator
D
scavenger and parasite
The relationship between a carnivore and an herbivore can be stated as B predator and prey.
What are the predator and prey ecological relationships?The predator and prey ecological relationships can be defined as ecological associations in which an organism serves as food for others in the food web, thereby leading to the homeostasis of the whole system in the food chain.
Therefore, with this data, we can see that predator and prey ecological relationships are based on different trophic levels where one organism situates below in the food chain is the prey of another.
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The order of the genes on a plant chromosome is A, B, C, where A and B are located 10 cM apart and B and C are located 3 cM apart. What is the probability that the trihybrid ABC/abc will produce any kind of recombinant gamete
Answer:
Double Crossing-over prob = 0.3% Simple Crossing-Over prob A-B = 9.7%Simple Crossing-Over prob B-C = 2.7%Total Crossing-Over prob = 12.7%Explanation:
Available data:
order of the genes on a plant chromosome is A, B, CA and B are located 10 cM apartB and C are located 3 cM apartThe genetic distance = recombination frequency x 100 expressed in map units (MU). One centiMorgan (cM) equals one map unit (MU).
We can use the provided map with the distances between genes to predict the occurrence of any kind of recombinant gamete.
We know that there is a probability of a simple crossing over to occur between genes A and B, or between genes B and C. And we also know that there is a probability of double crossing-over occurrence.
We can get the probability of the double-crossing over by multiplying the recombination frequencies between A-B and B-C. So,
DCO prob = recombination frequency A-B x recombination frequency B-C
= 0.1 x 0.03 = 0.003 = 0.3%
DCO prob = 0.3%
According to this, we would expect to find
0.15% AbC0.15% aBcNow we need to know what are the probabilities of getting a simple crossing-over, SCO. We already have the genetic distances between genes. 10 cM equals 0.1 of recombination frequency, and 3cM equals 0.03 of recombination frequency. However, we can not estimate the probabilities of simple crossing over using only this information, because this data is including the probabilities of the double crossing-over occurrence. So we need to substrate this percentage.
SCO prob A-B = 0.1 - 0.003 = 0.097 = 9.7%
SCO prob A-B = 9.7%
we would expect to find
4.85% Abc4.85% aBCSCO prob B-C = 0.03 - 0.003 = 0.027 = 2.7%
SCO prob B-C = 2.7%
we would expect to find
1.35% ABc1.35% abCThe total Crossing-over probability, TCO, is then the sum of all the crossing over probabilities,
TCO= SCO A-B + SCO B-C + DCO
TCO prob = 9.7% + 2.7% + 0.3%
TCO = 12.7%
In guinea pigs, the allele for black fur (B) is dominant over the allele for brown (b) fur. A black guinea pig is crossed with a brown guinea pig, producing five F1 black guinea pigs and six F1 brown guinea pigs. a. How many copies of the black allele (B) will be present in each cell of an F1 black guinea pig at the following stages: G1, G2, metaphase of mitosis, metaphase I of meiosis, metaphase II of meiosis, and after the second cytokinesis following meiosis
Answer:
G1: One copy of the B allele per cellG2: Two copies of the B allele per cellmetaphase of mitosis: Two copies of the B allele per cellmetaphase I of meiosis: Two copies of the B allele per cellmetaphase II of meiosis: One copy of the B allele per cellsecond cytokinesis following meiosis: One copy of the B allele in only two of the four daughter cells.Explanation:
Due to technical problems, you will find the complete explanation in the attached files
Which of the following is not released by sweat glands?
A. Water. B. Salt.c.waste d.oil
Answer:
c. Waste
JSJSJSJS
Explanation:
Hatdog
A population of rabbits lives in a grassy field that is lush and green in summer and covered in snow in winter. At the start of the summer, 75% of the population are white rabbits, and the remaining 25% of the population are brown rabbits. In rabbits, white (W) is dominant over brown (w). During the summer, the field where they live experiences a drought. The summer drought lasts for two years, through many generations of rabbits.
Which prediction BEST estimates the expected percent of white and brown rabbits in the population at the end of the drought?
Answer:
The rabbit population will consist of 35% white rabbits and 65% brown rabbits.
Explanation:
hope this helps!
The rabbit population will consist of 35% white rabbits and 65% brown rabbits.
What are the limiting factors of the rabbit population?Until a limiting factor, such as low reproduction, food scarcity, predation, disease, and/or weather conditions restrict populations, the population tends to grow.
Some density-dependent limiting factors are the spread of pathogens, competition for nesting locations, the destruction of habitat, increase in the population of predators. Several predators, including raptors and coyotes, use rabbits as food, but in urban and suburban areas, cats and dogs pose the biggest threat. Some abiotic limiting factors are drought, flood, earthquake, and all types of natural disasters.
Thus, the rabbit population will consist of 35% white rabbits and 65% brown rabbits.
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2. How does a generator create current?
It is important to understand that a generator does not actually 'create' electrical energy. ... This movement creates a voltage difference between the two ends of the wire or electrical conductor, which in turn causes the electric charges to flow, thus generating electric current.
How is energy stored when ADP is converted to ATP?
Answer:
Energy is stored in the bonds between the phosphate groups (PO4-) of the ATP molecule. When ATP is broken down into ADP (adenosine diphosphate) and inorganic phosphate, energy is released. When ADP and inorganic phosphate are joined to form ATP, energy is stored.
Explanation:
Hope this helped Mark BRAINLEST!!
PLEASE HELP FAST
4. Which choice is a risk factor that may increase chances of abusing alcohol?
1.no access to alcohol
2.no peer pressure
3.alcoholic parent
4.high self-esteem
Answer:
3.alcoholic parent..ÔwÔ
lauren was walking in the woods when she found a rotting log. when she looked closely at the log, she saw that a decomposer was working to break down the wood. which could be the decomposer she saw on the log?
A. grass
B. mouse
C. mushroom
D. caterpillar
Answer:
C. mushroom
Explanation:
Please help me I don't understand
Answer:
D
Explanation:
All of the other options go against actual facts and the laws of biology
Mitosis occurs in certain types of eukaryotic cells called:
A. Gametes
B. Somatic cells
C. Sex cells
D. Egg and sperm cell
Answer: somatic cells
Explanation: the other three don’t cause mitosis, instead cause meiosis
VA (rod-shaped)
B (spiral-shaped)
C (spherical)
what is the question? I can't see.
77 POINTS, PLEASE HELP ASAP
1): Lily is dressing up as a chicken for Halloween this year and is flapping her arms like a bird as she walks from house to house. As Lily flaps her arms down to her sides, what type of movement is occurring?
2): Katie loves pretending that she’s a human cannonball. As she jumps off the diving board, she assumes the proper position before she pounds into the water: head and thighs tucked against her chest; back rounded; arms pressed against her sides while her forearms, crossed in front of her shins, hold her legs tightly folded against her chest. What movement term would best describe the positioning of Katie’s vertebral column, head, thighs, lower legs and lower arms? HINT: She is about as far from the anatomical position as she can get.
Answer:
1. abduction & abduction
2. flexed
help help help help!
Answer:
1:C
2:C
3:D
4:D
this is 110% fact answer
Why do you think that it is important for health care workers to have corona virus vaccine?
Yes, I think it is essential for health care workers to receive the coronavirus vaccine. Health care workers, such as doctors and nurses, help patients with and without the virus. I believe that all health care workers should be vaccinated for their own health and their patients' health.
7. Explain how the equations for photosynthesis and cellular respiration compare.
Answer: In Photosynthesis, carbon dioxide and water is yielded to glucose and oxygen. In respiration, glucose and oxygen is yielded to carbon dioxide and water. C6H12O6 (glucose) + O2(oxygen) → CO2(Carbon Dioxide) + H2O(water) + ATP energy. The products of one process are the reactants of the other. Notice that the equation for cellular respiration is the direct opposite of photosynthesis: Cellular Respiration: C6H12O6 + 6O2 → 6CO2 + 6H2O. Photosynthesis: 6CO2 + 6H2O → C6H12O6+ 6O.
Explanation:
HELP ME PLEASE ILL GIVE YOU POINTS AND BRAINLIEST
word bank :
methane
reemitted heat
reradiated heat
solar radiation
carbon dioxide
label the diagram
Answer:
A= Methane
B= Carbon Dioxide
C= Solar Radiation
D= reemitted heat
E = reradiated heat
Sauce me brainliest
How can humans reduce
the impact of a storm surge?
Explanation:
reducing the impact Global climate change may result in increased storm surge flooding in some areas, through intensification of the cyclones driving the storm surges and as a result of sea level rise. Mangroves can reduce storm surge water levels by slowing the flow of water and reducing surface waves.
Which best describes a recessive allele?
A. Always inherited from a parent when a dominant allele is inherited from the other parent.
B. Never inherited from a parent when a dominant allele is inherited from the other parent.
C. Only determines phenotype when a dominant allele for the same trait is present.
D. Does not determine phenotype when a dominant allele for the same trait is present.
Answer:
B!
Explanation:
A recessive allele can't be shown in the child unless there is no dominant allele.
Hope this helps, please mark me brainliest if it does! :)
Answer:option d
Explanation:
because ressesive alleles is not exhibited when a dominant allele is present. it may help to find genotype but not phenotype.
What happens in an ad hominem persuasive technique? A limited number of options are presented. A person is attacked rather than an argument. Loaded language is used to appeal to emotions. A quick judgment is made without the use of evidence.
Answer: B
Explanation:edg2021
In an ad hominem persuasive technique a person is attacked rather than give an argument.
What is an ad hominem argument?
An ad hominem reasoning argument is a type of argumentation where its validity is not based on an attribute.
An ad hominem argument is fallacious because it does not involve verifiable information to be proved.
This type of argumentation occurs when one person is attacked based on feelings of prejudice and or fallacious commentaries.
In conclusion, a person is attacked rather than give an argument in an ad hominem persuasive technique.
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When writing the name of an organism which part starts with a capitol letter?
A. Kingdom
B.genus
C.species
Answer:
I believe it is Genus, but I'm not sure.
Explanation:
what was the speed of a car that traveled 240 m in 12 s
Answer:20
Explanation: Because when you divied 240 by 12 you get 20.
240/12=20
Answer:
20m/s
Explanation:
Speed is equal to distance/time. Since we know that the distance is 240m and the time taken to travel 240m was 12 seconds, we can divide them 240/12 and once we do this we can get our final answer of 20m/s.
Which of the following is NOT an ecosystem
service that forests provide?
habitat for wildlife
reduce soil erosion
lumber
carbon sink
all of the choices are ecosystem services
Answer:
All of the choices are ecosystem services.
Explanation:
Trees' roots hold soil down so it doesn't move everywhere and they recycle carbon into oxygen. In addition, they provide us wood and beautiful wildlife!
Have a great day!
The ecosystem services are all the benefits provided by the ecosystem to human. Otion A) habitat for wildlife is not an ecosystem service.
What are the Ecosystem Services?
When talking about ecosystem services, we are referring to the goods and services offered by ecosystems to human populations
There are different types of ecosystemic services:
Provision or supply:These are the products obtained by nature to be used or consumed, directly or with previous processing.
Among them, we can mention food, clear fresh-water, fertile soils, geotic materials, raw materials (used for clothing, construction), renewable fuels, biochemical compounds, pharmacological/medicinal resources, and others.
Regulation:Refers to ecological processes that improve life.
Among others, we might mention climate regulation, CO₂ absorption, water purification, air purification, erosion control, natural disaster avoidance such as flooding, soil formation and fertility maintenance, nutrient cycling, waste recycling, pests/plagues control, etc.
Cultural:Refers to the benefits that are not material.
Ecosystems also provide a recreational place or area to spend time, learn. They are a spiritual/religious space, a source of inspiration. They are considered to be cultural patrimony and the source of scientific knowledge.
Among th options, the one that is not a ecosystemic service is option A) habitat for
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.
How “Competition in an ecosystem” is playing a role in life?
Which of the following correctly explains the differences between artificial and natural selection?
Not sure what the options are, but artificial selection would be when farmers/breeders choose only to plant/breed the organism with desired characteristics in order to cause the evolution of the trait while natural selection is when organisms that are better adapted to their environment usually survive and produce offspring, causing the evolution of their traits which help them to survive.
Hope that helps!
What characteristic do all protists have in common?
A) flagella that help them move
B) structures made of many cells
C) ability to make their own food
D) cell nuclei that contains DNA
!!^^^
Answer:
D
Explanation:
All other answers are not true.