Severe flooding in an area caused a population of minnows to become split into two separate ponds. Prior to the separation, the male minnows all had a moderate number of spots. Following the separation, the first pond was filled with larger fish that fed on minnows, so male minnows with fewer spots were better able to avoid detection by predators. The minnows in the second pond, however, had very few predators, and female minnows in this pond preferred to mate with males that had the most spots. After many generations, the two minnow populations evolved into different species and could no longer interbreed.
Answer:
Geographic isolation
Explanation:
Geographic isolation occurs when a population is split by geographic factors, such as the flood mentioned. They can become separate species over time and will no longer be able to produce viable offspring. Hope it helps :)
Compare salt marshes and mangrove forests and explain why mangrove forests are such critical habitats on high energy coasts.
Answer:
Explanation:Coastal wetlands in the southeastern U.S. provide many important ecosystem goods and services. In addition to supporting important fish and wildlife habitat, they maintain coastal fisheries, store carbon, improve water quality, protect coastlines, and provide recreational opportunities. In many ways, coastal wetlands are dynamic and resilient ecosystems; however, they are being subjected to tremendous environmental change at the regional (e.g., hydrologic alterations, nutrient enrichment) and global scale (e.g., climate change).
One aspect of global change that is expected to have a substantial impact on coastal wetlands is winter climate change. Salt marshes and mangrove forests are common coastal wetland ecosystem types that occupy similar estuarine environments but have different climatic tolerances. In warmer climates, mangrove trees often outcompete salt marsh grasses. However, mangrove forests are sensitive to freezing temperatures, and within the region, mangrove forests are currently found only in Florida, Louisiana, and Texas (though isolated individuals have been reported in Mississippi). Salt marshes are more dominant along colder coastlines where mangroves are not able to survive freeze events. Future climate change is expected to result in increased winter temperatures and, potentially, reductions in the intensity of freeze events which could lead to mangrove forest replacement of salt marsh in parts of the Gulf of Mexico and southeastern Atlantic coast.
From a functional perspective, salt marsh grasses and mangrove trees are foundation species that control ecosystem dynamics and, in stressful and highly dynamic environments, provide the structural properties needed by other species; hence, the ecological and conservation implications of grass-to-tree conversions in coastal wetlands could be large (in both positive and negative ways). Dr. Mike Osland, USGS Research Ecologist and GCPO LCC staffer, along with 4 collaborating scientists, has initiated a study that addresses the following question: how might winter climate change impact the distribution and abundance of salt marshes and mangrove forests in the southeastern U.S.?
Their results begin to illustrate the vulnerability of salt marshes in the southeastern U.S. to mangrove forest expansion and quantify the amount of salt marsh habitat within each state that could be impacted by mangrove forest expansion under various winter climate change scenarios. The preliminary results are striking in terms of the potential for mangrove forest range expansion and coastal marsh displacement in the region. The hope is that these analyses stimulate additional discussion, research, and planning regarding the potential ecological and conservation implications of winter climate change for coastal wetlands in the southeastern U.S.
Answer:
Salt marshes are coastal wetlands found throughout the world on protected shorelines and on the edges of estuaries where freshwater mixes with seawater.
Mangrove forests are those which contain Mangroves which are trees and shrubs that grow in saline (brackish) coastal habitats in the tropics and subtropics.
Explanation:
The disorder known as cystic fibrosis (CF) is inherited in a recessive autosomal manner. In populations of Northern European descent, the frequency of people with CF is about 1 in 2,500. Assuming Hardy-Weinberg equilibrium for this disorder, answer the following: A. Assuming Hardy-Weinberg equilibrium, what percentage of people in the population would be expected to be heterozygous carriers
Answer:
The correct answer is -
A. 3.9% people in the population would be expected to be heterozygous carriers
Explanation:
The genotype frequency for the CF affected is 1/2,500,
= 1/2500
= 0.004. This is equal to q^2
here q = frequency of recessive alleles combination or CF people. (H-W equation => p^2+q^2+2pq=1)
The allele frequency is the square root of q^2 value, which equals 0.02. The frequency of the dominant allele or p would be
1 - 0.02 = 0.98 (p+q = 1)
The frequency for the CF combinantion =0.004
the dominant or unaffected people genotype
= (098)^2
= 0.96;
and for the heterozygote, it is
= 2pq
=2(0.98)(0.02)
= 0.039 or 3.9%
Sally was exposed to hepatitis. Her doctor gave her an injection containing
antibodies to help her fight off the infection before her immune system had a chance
to kick in.
action
or
MAR is
tion
72411
active immunity - naturally acquired
active immunity - artificially acquired
passive immunity - naturally acquired
passive immunity - artificially acquired
Answer:
The correct answer is - passive immunity - artificially acquired.
Explanation:
Passive immunity is the immunity that involves giving or acquiring antibodies from other sources instead of developing them on one's own. This type of immunity can be natural and artificial. Mother breastfeed the babies, is the natural passive immunity example as milk also contain antibodies required for immunity of babies.
Artificial passive immunity is the immunity that comes from injecting the antibodies created in different animals or persons which called antiserum or vaccines such as snake antivenom.
Susan noticed that hummingbirds in her yard visited all the flowers, but especially
the parents were eating nectar, they must feed their babies only nectar as well.
To her surprise, she saw hummingbirds bringing small spiders and insects to feed the young humming
She should stick to her assumption that the babies eat nectar since she thought that first.
She should believe what she read in the book and disregard what she witnessed.
She should change her original assumption that they only feed their babies nectar.
She should ask other people what they think and agree with the majority.
Answer:
to her surprise, she saw hummingbirds bringing small spiders and insects to feed the young
Explanation:
please give brainly!!!!
(((20 POINTS!!!)
The size of a population will increase when the number of births
A.
is the same as the number of deaths.
B.
is greater than the number of deaths.
C.
remains equal to the number of deaths.
D.
fluctuates up and then down.
A cat has 38 chromosomes. How many chromosomes would the cat’s sex cells have?
answers:
14, 19, 16, 0r 12
PLZ ANSWER QUICK AND CORRECTLY
Answer:
19
Explanation:
divide 38 by 2
Choose three characteristics of enhancers and silencers. Select the three correct statements. Select the three correct statements. Their orientation may be inverted without significant effect. They can act only at a little distance from the promoter. An enhancer can regulate many different genes, while a silencer regulates only one gene or group of closely related genes. They can regulate only one gene or group of closely related genes. They can act at a great distance from the promoter. They can regulate other genes when inserted. They can only act if they are placed downstream from the promoter.
Answer:
im sorry idfk
Explanation:
The train speeding down the track. The faster the train moves diesel fuel the train uses. That means the faster the train goes, the more what it needs?
Answer:
I really think that this is engineering or maths but this not for biology
FOR SURE
The train speeding down the track. The faster the train moves diesel fuel the train uses. The faster the train goes the more it need energy.
What is energy?Energy is defined as a quantitative quality that is conveyed to a person or a physical system and is discernible in the way work is done as well as in the way heat and light are produced. It is important because it is a fundamental human requirement, energy plays a significant role in our daily lives. The primary energy source is the sun.
Railroads used to run their locomotives on petroleum-based diesel fuel, but they are now powered by renewable diesel and biodiesel blends. Biodiesel and renewable diesel are both produced using renewable energy sources rather than fossil fuels.
Thus, the train speeding down the track. The faster the train moves diesel fuel the train uses. The faster the train goes the more it need energy.
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Which of the following is an example of an environmental impact of agriculture?
A major cause of deforestation and other ecological damage that destroys habitats and biodiversity is agricultural growth.
Thus, Lowland forests in Indonesia being replaced by oil palm plantations, and the Cerrado and Atlantic Forests in Brazil and Paraguay are harmed by soy farming.
Extreme erosion is caused by logging and farming methods that are not sustainable. Half of all agricultural topsoil has been lost during the previous 150 years.
In many nations, agriculture is the main cause of pollution. Pesticides, fertilizers, and other harmful agricultural chemicals have the potential to contaminate fresh water, marine habitats, air, and soil. They may also linger in the environment for many years.
Thus, A major cause of deforestation and other ecological damage that destroys habitats and biodiversity is agricultural growth.
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For each of the following
statements, say whether it is true for mitosis only, meiosis only,
both, or neither
(a) The DNA is replicated before cell division starts.
(b) The homologous chromosomes pair up during division.
(c) The cell divides only once during the process.
Answer:
A-Both
B-Unknown but you said it was fine
C- mitosis
Explanation:
Mitosis and meiosis both have interphase, in which dna is replicated (synthesis). B I don’t know, hopefully you can get that one figured out—sorry :(. Meiosis occurs twice, which is why it results in 4 cells (gametes). Hope this helps a little :)
HELP ASAP!! I WILL MARK BRAINIEST I NEED HELP ON ALL!!
1.
Which of these rocks forms when magma cools and hardens?
A. coal
B. shale
C. granite
D. sandstone
2.
Which of these rocks forms from compacted and cemented sediments?
A shale
B. basalt
3.
C. gneiss
D. granite
I
What
type
of rock forms when heat and pressure inside Earth chemically change existing rock?
A. igneous rock
B. sedimentary rock
C. metamorphic rock
4.
How would you identify a glossy, black, microscopically fine-textured rock that has no layering?
A. marble
C. obsidian
B. granite
D. limestone
5. Which of the following is true of a silicate mineral?
A. It contains only carbon
B. It must contain a metal.
C. It contains silicon bonded to oxygen
D. It can only be found in metamorphic rock
1. I think it is C
2. Possibly A, as shale is a sedimentary mineral
3. C possibly
4. C, obsibian, very glossy and fine, i have some at home, so i know the charactisitics
5. C
Which part of the electromagnetic spectrum was used by Galileo when he looked through a telescope and saw light from the stars with his eyes?
O gamma radiation
radio waves
visible-light
0 X-rays
Answer:
visible
Explanation:
Which component of milk causes caramelization when heated?
Answer:
i think its carbohydrates
Explanation:
As the carbohydrates are heated, the molecules break down and reform into compounds with a characteristic brown colour and flavour.
hope this helps
The component of milk that causes caramelization when heated is lactose, as it is a disaccharide sugar that is present inside milk and consists of monosaccharides such as galactose and lactoses.
During the caramelization process in milk, heat causes the lactose molecules to undergo thermal decomposition due to the heat, resulting in the formation of various compounds, such as caramelan, caramelene, and carameline, etc. These compounds are the major factors for browning and flavor development of milk when it is heated. At a high temperature, the caramelization process is done.
Learn more about the lactose here.
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Is this bird
A. Feeding
B. Photosynthesizing
C. Digesting
D. Respiring
Answer:
c
Explanation:
Explain the use of NBT
Answer:
The National Benchmark Tests (NBTs) are assessments for first-year applicants into higher education institutions. The NBTs were designed to measure a writer's ability to transfer understanding of Academic Literacy, Quantitative Literacy and Mathematics to the demands of tertiary coursework.
Hope this helps.
Answer: The National Benchmark Tests are assessments for first-year applicants into higher education institutions.
Explanation:
Do all changes to dna alter the phenotype of an organism? Explain.
Answer:
No change occurs in phenotype.
Explanation:
This can happen in many situations:
perhaps the mutation occurs in a stretch of DNA with no function, or perhaps the mutation occurs in a protein-coding region, but ends up not affecting the amino acid sequence of the protein.
True or False - Deoxygenated blood is blue
Answer:
True beoxygenated blood is blue
Describe how climate change will impact the human population.
*5 sentences or more*
Answer:
the answer is in the picture.
Answer: Climate change will likely increase the frequency and strength of extreme events (such as floods, droughts, and storms) that threaten human health and safety. Climate changes may expose more people to diseases. Some groups of people (e.g., the very young and the very old) are especially vulnerable to health impacts. First, older people are physically more vulnerable to extreme heat, so population aging could exacerbate increases in heat-stress mortality brought on by climate change. Higher temperatures also exacerbate outdoor air pollution such as ozone, which also disproportionately affects older people. Human health is vulnerable to climate change. The changing environment is expected to cause more heat stress, an increase in waterborne diseases, poor air quality, and diseases transmitted by insects and rodents. Extreme weather events can compound many of these health threats. Climate affects population distribution both directly as well as indirectly through its effects on soil, vegetation and agriculture that have direct bearings on the pattern of population distribution. ... This explains a high density in the tropics, which are otherwise marked with extremes of climatic conditions.
Explanation:
If you were appointed to a senior position, what would you do first?
Explanation:
I will study my responsibility.I will work as a guardian to the juniors and fulfill the tasks I am accompanied with.I will try my best to satisfy everyone.I won't give any kind of disappointment to anyone regarding my work and performance.
SERIOUSLY I NEED HELP I AM TAKING A BIOLOGY TEST!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!Describe how the ear converts sound into messages that the brain can interpret.
GIVE A DESCRIPTION OF 125 WORDS
Answer:
SOUND WAVES enter the ear canal and cause the eardrum to vibrate. ... Moving fluid bends thousands of delicate hair-like cells which convert the vibrations into NERVE IMPULSES. Nerve impulses are CARRIED to the brain by the auditory nerve. In the brain, these impulses are CONVERTED into what we "hear" as sound.
Explanation:
would it be better to mine in a wilderness area than a developed area?
Answer:
Yes.
Explanation:
Mining in a area of wilderness can provide great succes as long as you know the area well and know some things about where to mine and not.
Answer: Yes, it is better to mine in a wilderness area than a developed area.
Explanation: Mining is carried out to gather raw materials that serve as the foundation for any country's or region's growth. It is more likely to occur in a wilderness area than in a developed area because mining usually has a negative impact on the environment.
The ores recovered by mining, such as oil, coal, metals, and others, cannot be obtained from any developed location, and the mining process destroys settlements in developed areas.
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What is the function of the central nervous system?
a) to relay messages
b) to analyze information
c) to process information
d) all of the above
1 point
Based on modern evolutionary theory, the development of a new species
would most likely be associated with *
A) a constant environment
B) stable gene pools
C) geographic isolation
D) a lack of mutations
Evolution can occur at different rates; however, for evolution to occur.
I will give BRAINLY please help
Answer:
A
Explanation:
It makes the most sense! if it is correct please mark me brainly. if it is wrong tell me or report me!
A single codon is used to signal the beginning of protein synthesis. It is commonly called the START CODON. Locate the start codon on the chart. What are the three bases of this codon? ________
About the question:
You will find the chart in the attached files
Answer:
The strat codon is AUG
Explanation:
Genetic information for the aminoacids assembly during the protein synthesis is stored in short sequences of three nucleotides named codons in the mRNA. Each of the codons represents one of the 20 amino acids used to build the protein. The total number of possible codons is 64, from which 61 codify amino acids -more than one codon codify for the same amino acid-. One of these amino acids is also the start point of protein synthesis. And the left three codons are stopping translation points.
The codons indicating the initiation or stop points during the translation process are:
The start codon AUG is the most common sequence used by eukaryotic cells and places near the 5´extreme of the molecule. However, other codons might be used as well. Prokaryote cells might use the codons GUG or UUG. The end codons are UAA, UAG, UGA.Answer:
AUG
Explanation:
What are the three bases of this codon? AUG
sustainability refers to using resources in such a way that we ensure that they will be clean and healthy for our use
Answer:
The given statement is true.
Explanation:
Sustainability aims to satisfy immediate requirements, without either undermining skilled workers' opportunity to accomplish about there requirements or needs.It allows companies to decide on their lengthy effects throughout regulatory, socioeconomic, as well as evolutionary terms as well as on quick benefits, including such income reports during the next half portion.These large, violent storms are created over water, move counter clock Spring Wise, and form an eye in the center What are these storms called?" O from 2. On the weather map. Asheville has over it What does this represent parts.
Answer:
b
Explanation:
Self-portraits can help you learn about positioning people in a photograph.
True
False
A camera's self-timer takes a picture after a certain amount of time has passed.
True
False
1.) True
The reason this is true is because adjusting the camera allows you to get an understanding of how someone else should look or how they would likely look best when photographed. It also gives an understanding of how a camera should be aimed to get the best result.
2.) True
While many cameras have this feature, most are configured to only use this feature when the photographer selects it. This feature allows the photographer to adjust the camera in case they feel something isn't quite right with it, and it also allows them to get into the picture themselves if they feel they want to.
Hope this helps you, and have fun with whatever it is you are doing with your camera.
-Sayonara
Answer:
it is true for a and true for b. (aka a is question and b is question 2.)
Explanation:
Carbon dioxide is a naturally occurring gas that is vital to plant and animal life, yet carbon dioxide emissions from burning of fossil fuels are expected to result in significant climate change within 100 years. Should carbon dioxide be considered to be a pollutant? Support your position by providing reasons why or why not.
Answer:
Yes, it should be considered a pollutant
Find the reason below
Explanation:
A pollutant is any substance that poses threat or causes harm to the sustainability of the environment. As rightly stated in this question, carbon dioxide (CO2) is a naturally occuring gaseous constituent of our atmosphere. It is vital to both animal and plant life as it is utilized by plants to synthesize their food (glucose), which is the starting point for the flow of energy.
Although CO2 plays a major role in sustaining life, it is also a major cause of GLOBAL WARMING. Carbon dioxide is considered the most important greenhouse gas as it has the ability to trap and emit heat, contributing to the global rise in atmospheric temperature. This causes a lot of harm and environmental disturbance, hence, CO2 despite its beneficial purpose, should be considered a POLLUTANT.