Over time, a series of random occurrences can cause an allele to become more or less common in a population. This is called . When a population is severely reduced by an environmental disaster such as a fire, the result is a due to the reduced genetic diversity of the survivors. 3. The can occur if a small group of organisms migrates to a new location and becomes isolated from the rest of the population.
Answer:
Over time, a series of random occurrences can cause an allele to become more or less common in a population. This is called Genetic drift.
When a population is severely reduced by an environmental disaster such as a fire, the result is a Bottleneck effect due to the reduced genetic diversity of the survivors.
The Founder effect can occur if a small group of organisms migrates to a new location and becomes isolated from the rest of the population.
Explanation:
Genetic drift is an evolutive force. It is the random change that occurs in the allelic frequency of a population through generations. Its effects are harder in a small-sized population, meaning that the magnitude of this change is inversely related to the size of the original population.
Genetic drift results in some alleles loss -including the beneficial ones-, while some other alleles get fixated. Low-frequency alleles are the most likely to be lost. The changes produced by genetic drift accumulate in time and results in a loss of genetic variability within a population.
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.
The bottleneck effect -a case of genetic drift-, mostly affects smaller populations after the occurrence of a natural disaster or some human action -such as extensive hunting, for instance-. These events might act as a pressure that reduces significantly the number of individuals in a population. In these situations, some alleles are lost, and the survivors have a different genetic charge than the one of the original population. There might be 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. Founder effect refers to the origin of a new population from only a few individuals that are coming from a bigger-sized population. These founder individuals, which are carrying some of the genes of the original population, settle down in a new area and reproduce. The new and small population might or might not be genetically representative of the original one. Some rare alleles might be exceeded or might be lost by complete. Consequently, when the small population increases in size, it will have a genetically different composition from the original one. In these situations, genetic variability is reduced, and there exists the possibility of developing a peculiar allelic composition. When the number of individuals that originated the new population is low, the founder effect will be very extreme because the genetic drift effects are inversely proportional to the original number of individuals.No links please im already failing
Answer:
Think its the last one
Inherited traits are:
A Dependent on diet
B Acquired during an organism's life
C Free of mutations
D Passed on from parent to offspring
Answer:
d
Explanation:
what can you conclude about the connection between a leaf's size and the amount of sunlight it absorbs?
(a). The smaller a leaf is, the more sunlight it absorbs.
(b). The larger a leaf is, the more sunlight it absorbs.
(c). The connection between the size of a leaf and the amount of sunlight it absorbs cannot be predicted.
(d). Large leaves and small leaves absorb about the same amount of sunlight.
how do all the dna structures work together is it like a machine
its like a twisted ladder or a double helix
how stuff works dot com
Explanation: Yes, It is like a machine only a person sits in a chair and they have to tell the truth while the worker asks the person questions and they have thing wrapped around there arm to tell if there telling the truth or lying so yes it is like a machine.
Of the five things that you listed in question 1, which one do you think holds the most promise for making a real difference in environmental quality over the long term.
The Five Things are Transport, Agriculture, Culture, Economics, and Energy
Answer:
agriculture
Explanation:
Answer:EconomicsExplanation:
Fill in the blanks for the three statements of Cell Theory.
All______are made up of cells.
Cells come from other cells.
Cells are the basic unit of_______.
a. Life; cells
b. Abiotic factors; biotic factors
C. Living things; life
d. Plants; organelles
Answer:
c and a
Explanation:
Answer:
C. Living things; life
Explanation:
Image is attached
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Have a good day :)
Match the definition to the correct term.
a vesicle of enzymes in a cell
a flatworm that can cause digestive and respiratory infections
an animal that digests plant material in a separate stomach compartment
:: lysosome
:: fluke
:: ruminant
Answer:
It goes in the order you have it in
Explanation:
The antlion is a ______
Explanation:
Antlion, (family Myrmeleontidae), any of a group of insects (order Neuroptera) that are named for the predatory nature of the larva, which trap ants and other small insects in pits dug into the ground. Antlions are found throughout the world, primarily in dry, sandy regions.
How is a person exposed to toxins? Explain each. (There are three ways to be exposed to toxic substances.
Answer:
Three ways to be exposed to toxic substances:
1. Inhalation - Inhalation is when we are breathing something into our lungs. For example, a firefighter may ingest toxic gasses and chemicals when entering a burning house.
2. Ingestion - Ingestion is when we are taking something by mouth. If someone eats a piece of cheese that is expired, they will most likely get food poisoning.
3. Skin contact - Skin contact is when a substance is in direct contact with our skin. For example, if someone spills an acidic substance on their arm during science class, this is considered a toxin and they may get a painful chemical burn.
How did the polar bears get their white fur?A.Bears have various alleles for fur color ranging from dark to light. Those bears with the lighter fur had a better chance of survival in the biome, so they lived and reproduced passing on their light colored gene to their offspring. As generations passed, white fur became more common.B.As a polar bear grows up, its fur gradually gets lighter, so by the time they are a teenager, they have fully white fur and are then best suited to survive in their environment.C.Polar Bears migrated from the Pacific Northwest up to the Tundra and Arctic because they knew that they would have a better chance of surviving in this cold region.
Answer:
I believe it’s c report me if I’m wrong on this
Explanation:
Use your knowledge of the base pairing rules to identify and transcribe this DNA code to mRNA.
DNA template strand: TAC GCC CTA ATA GAT TAG CCC ACT
mRNA sequence:
Which of the following represents MEiosis? *
10 points
It produces 4 haploid, 1️⃣N cells.
It produces 4 diploid, 2️⃣N cells.
Answer:
my answer will be it produces 4 diploid, 2 n cells
What is digestion?
the process of breaking down food into small enough pieces to be absorbed by the cells
1. the process of eating and chewing
2. the process of releasing energy to the cells
3. the process of breaking down food enough to be swallowed
1. Compact, complex animals have internal exchange surfaces that are extensively branched or folded, providing a large _____________.
2. In the _____________, nutrients are absorbed across the many fingerlike projections of the lining of the intestine.
3. In the _____________, oxygen and carbon dioxide are exchanged across the epithelial linings of sacs at the tips of tiny air tubes.
4. In the _____________, wastes are removed from the blood across the epithelial linings of excretory tubes.
5. The _____________ transports materials between the exchange surfaces of other organ systems and body cells.
6. Body cells are bathed in _______________, and exchange between body cells and the blood takes place through this fluid.
Answer:
1.) Surface area
2.) Digestive system
3.) Respiratory system
4.) Urinary system
5.) Circulatory system
6.) Interstitial fluid
Explanation:
In higher complex animals, such as the vertebrates, the internal exchange surfaces are modified in such a way to facilitate the transfer of materials from cell to cell in the body. As animal size increases, diffusion distances increase and the ratio of surface area to volume drops. Larger organisms have had to evolve specialized systems that are made up of structures that provides a large surface area for internal exchange of materials. Examples of these systems include:
--> DIGESTIVE SYSTEM: The fingerlike projections of the lining of the intestine provide a large surface area for the absorption of nutrients.
--> RESPIRATORY SYSTEM: This ends with a sac called the alveolar sac. The anatomical arrangement of capillaries and alveoli produces a very large surface area that is available for gas exchange.
--> URINARY SYSTEM: wastes are easily removed from the blood across the epithelial linings of excretory tubes.
--> CIRCULATORY SYSTEM: transports materials between the exchange surfaces of other organ systems and body cells. An example is seen in the relationship between the alveoli and the capillaries surrounding it.
For any exchange of materials to occur between cells the fluid known as the INTERSTITIAL FLUID which fills the intercellular spaces allows dissolved materials to be exchanged between body cells and the blood
Select a hypothesis above that would help restore equilibrium and explain your reasoning.
Answer:
analize data and draw a conclusion
James has installed soil sensors on his farms. What do soil sensors measure?
O A.
rainfall
OB.
fertilizer use
OC.
nutrients
OD. humidity
O E.
moisture content
Answer:
O E.
moisture content
Explanation:
what kind of fault forms between two plates that are converging?
Answer:
Reverse faults occur at convergent plate boundaries, while normal faults occur at divergent plate boundaries. Earthquakes along strike-slip faults at transform plate boundaries generally do not cause tsunami because there is little or no vertical movement.
Explanation:
search in search engine
sorry about that
One side of section of DNA is shown below. A-G-C-T-T-G-A Which of the following would be the matching side of the section of DNA?
F A-C-G-T-T-C-T
G T-C-G-A-A-C-T
H A-G-C-T-T-G-A
J C-T-A-G-G-A-G
Answer:
G) TCGAACT
Explanation:
What are three new things that you learned about the creation of the universe?
Answer:
The universe is 14 billion years old.
Quasars reside in the cores of galaxies.
We thought the expansion of the universe was slowing down.
We've seen the same moment of time on more than one occasion.
The three new things related to the development of the universe should be that it have the 14 billion years old, cores of galaxies, and the expansion should be fall down.
What is the universe?The universe refer to the space and the time that involved the planets, stars, galaxies, etc with respect to the matter and energy.
The big bang theory represent the cosmological description at the time of development of the universe.
In this way, the three new things should be learned.
Learn more about universe here: https://brainly.com/question/10117154
The dominant trait for fur color in a species of fox is orange(O), the recessive trait is gray(o). If a fox has a phenotype of orange fur, what possible genotypes could they have?
Answer:
OO, Oo
Explanation:
A minor object orbiting in a solar system is a(n)
asteroid
regolith
meteorite
meteor
PLEASE HELP ASAP PLEASE PLEASE PLEASE 10. Julie has red hair while Billy has brown hair. Explain how the differences in their chromosomes can account for this difference in appearance
Answer:
Hair colour is casue by of DNA strand contained in the chromosome
Explanation:
A simplified answer to this is:
A chromosome contains a double stranded DNA, and DNA carries genetic information and accounts for gene expression. plus dna is unique to each individual.
What is the difference between acute and chronic poisoning
Answer:
Acute poisoning is poisoning on one occasion, which means it doesn't take very long to get symptoms. While chronic poisoning is is long term,Which would mean it would take a while to get symptoms.
Explanation:
Yeast causes faster rising than baking powder or baking
soda.
O True
O False
Answer:
true
Explanation:
if I'm wrong ok it's not my problem
based on questions 6 , 7 or 8 what happens to the voltage required in a circuit as the resistance decreases ? increases ?
Answer:
As the resistance decreases the Voltage Increases
Explanation:
Which of the following receives energy directly from the sun?
Group of answer choices
decomposers
nutrient pool
consumers
producers
Answer:
producers
Explanation:
producers are plants, grass, etc.
rashid is conducting a seminar on the importance of coral reefs which point should he include
Answer:
Protect coastlines from storms, erosion and provide habitat.
Explanation:
Coral reefs protect coastlines from storms and erosion as well as provide a habitat for thousands of aquatic animals. These points rashid must include in his seminar. Coral reefs are very important for the marine ecosystem because it can save the soil from erosion and decreases the intensity of storms by acting just like barrier. It provides food as well as living place for many organisms so these point are very important to be included in the seminar.
Answer:
that corals provide economic assistance to coastal populations through fisheries
Explanation:
How is DNA condensed in order to fit inside cells?
Explanation:
DNA is tightly packed up to fit in the nucleus of every cell. As shown in the animation, a DNA molecule wraps around histone proteins to form tight loops called nucleosomes. These nucleosomes coil and stack together to form fibers called chromatin.
Why isn't medical and chemical waste placed in landfills ? A. It would contaminate the land and water with dangerous poisons B. It would cause the landfills to fill up too quickly C. It would prevent refuse from breaking down over time D. It would contribute to global climate change
Answer:
A. It would contaminate the land and water with dangerous poisons
Explanation:
Putting medical and chemical waste into landfills has extremely dangerous consequences to the environment and public health.
If they were put into landfills, these toxic wastes would leech into the soil and groundwater below them.
These toxins can accumulate over time, and harm plants and animals.
Humans may also absorb these toxic chemicals.
So, the correct answer is A. It would contaminate the land and water with dangerous poisons
Answer:
A
Explanation:
The water and land will become contaminated which will harm or endanger all the living organisms and us humans around it. Because they use the water and land source.