How could physical barriers, such as a river or rift, lead to allopatric speciation

Answers

Answer 1

Answer:

This barrier prevents the individuals on one side from reproducing with the individuals on the other.

Explanation:

Hope this helps


Related Questions

In a population of white (W) and black (w) sheep, 22 out of 244 sheep are black. What is the frequency of the dominant allele in the population?

Answers

Answer and Explanation:

To calculate the allele frequency in the population, we divide the number of occurrences of the particular allele by total number of all alleles in the population Allele frequencies can be represented as a decimal, a percentage, or a fraction.

Given the population of white (W) and black (w) sheep, 22 out of 244 sheep are black, the frequency of the dominant allele in the population = 222/244×100=

How does salinity vary with evaporation?









Question 4 options:

When water evaporates, it leaves salt behind, increasing its salinity.


When water evaporates, it takes salt with it, increasing its salinity.


When water evaporates, it takes salt with it, decreasing its salinity.


When water evaporates, it leaves salt behind, decreasing its salinity.

Answers

Brainly inexplicably is preventing my response from being posted in text form (despite the absence of inappropriate words and links). I've thus provided my response as an attached image. Please let me know if there are any issues viewing or accessing it.

Answer:

A. When water evaporates, it leaves salt behind, increasing its salinity.

Explanation:

when water evaporates it only evaporates the water and leaves the salt behind thus the salinity increases since there is less water to salt. hope this helps! :D

What happens to the effenciency of the exchange of oxygen in the human body at a high altitude​

Answers

Answer:

The effiency decreases at higher altitudes

Explanation:

The higher up a person is on a mountain, the thinner the air is due to the lack of plants that can grow. An example of this is Mount Everest. At a certian point on the mountain, called the "Death Zone", the air is too thin to supply enough oxygen to the human body to survive. That's why they bring oxygen tanks with them on their adventures.

Can someone help with this ?

Answers

Answer:

to convert ADP to ATP

= first option

Explanation:

so it must be the first option

since in order for this conversion the process stated in the first option must occur.

All levels of biological organization and discription?pllsss paki sagutan po​

Answers

The levels, from smallest to largest, are: molecule, cell, tissue, organ, organ system, organism, population, community, ecosystem, biosphere.

5.Muscle that is attached to bones for movement and helps protect your inner organs is ____________________________.

smooth muscle
cardiac muscle
skeletal muscle

Answers

Answer:

cardiac muscle

I'm pretty sure that's the correct answer

2. What are the two main forms of energy? Describe them.

Answers

Answer:

Kinetic energy and Potential energy

Explanation:

Thank you

K and p energyyyyyy

how does acid rain affect an ecosystem?

Answers

Answer:

The ecological effects of acid rain are most clearly seen in aquatic environments, such as streams, lakes, and marshes where it can be harmful to fish and other wildlife. As it flows through the soil, acidic rain water can leach aluminum from soil clay particles and then flow into streams and lakes

Explanation:

Hope this helped <3

Suggest a way that each farm could change their farming practices to prevent pollution of the river with nitrates. Gizmo

Answers

Answer:

An improved agricultural practices such as adjustment of application rate, application of the right amount of nitrogen, use of slow controlled release fertiliser, applying nitrogen fertilisers when least susceptible to loss, crop rotation

Explanation:

The various ways are available to reduce or prevent pollution of the river with nitrates, the most effective is:- reducing or not use of artificial or industrial-based nitrogen fertilizers and using biofertilizers.

Agriculture or farming contributes to water pollution when using fertilizers more than the required amount or easily lost fertilizers. This increases the of nutrients including nitrates in the river that cause the growth of algal bloom and eutrophication.

There are several ways to control the nitrates in the river:

adjustment of using rateapplication of the right amount of nitrogenslow-release fertilizernitrogen fertilizers when least susceptible to losscrop-rotation and use of legumesavoiding over-irrigation

Thus, the correct answer is: reducing or not using artificial or industrial-based nitrogen fertilizers and using biofertilizers.

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Which generalization can be made from the data in the table?
1.The higher the temperature, the fewer chirps there will be in 10 seconds.
2.The chirps occur closer together as the temperature increases.
3.The chirps become farther apart as the temperature increases.
4.There is no relationship between temperature and the time between chirps.

Answers

Answer:

answer is C

Explanation:

it's according to the table as temperature has increased chirps has gradually decreased.

Answer:

The correct answer is B.

Explanation:

The chirps occur closer together. I took finished my test!

What is lapse rate with respect to the atmosphere?

Answers

Answer:

The term is almost always used with respect to temperature but is occasionally used for other variables.

Explanation:

someone already answered you, ima just type because i need points sorry

The routes nerve impulses from our senses.
A. thalamus
B. hippocampus
C. brain stem
D. corpus callosum

Answers

Answer:

a

Explanation:

The correct answer is C. Brain Stem.

How does the brain stem function?

The thalamus and other areas of the brain receive nerve signals from our senses through the brain stem. It is made up of the medulla, pons, and midbrain and is situated at the base of the brain.

The brain stem is in charge of regulating life-sustaining processes including breathing, heart rate, and blood pressure. It is also in charge of transmitting sensory data from the body to the thalamus, which subsequently transmits the data to the relevant parts of the brain.

Although the brain stem is the main pathway for nerve impulses from our senses, the hippocampus, corpus callosum, and thalamus are all important in the processing of sensory information.

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Need help on this *URGENT*

Answers

answer : divergent - the arrows show that the plates are moving apart.

why is it important to avoid planting the same crop in the same field year after year

Answers

Planting the same crop in the same place each year zaps nutrients from the earth and leaves soil weak and unable to support healthy plant growth. Because soil structure and quality is so poor, farmers are forced to use chemical fertilizers to encourage plant growth and fruit production.

please help:) i know it’s not biology but i don’t know what subject to put it under lol

Answers

Answer:

D. Overcast skies with strong winds.

Explanation:

clouds, high winds, and precipitation occurs if there is low air pressure is present. A low air pressure areas or regions is also known as cyclogenesis because when the intensity of low air pressure occurs, there is high chances of formation of storms or hurricanes in that region. A low air pressure system refers to a large mass of air that rises due to warmer land or water.

Arrange the following concepts from simplest to most complex: Chromosomes, DNA, Genome, Gene

Answers

Answer:

DNA -> Gene -> Chromosome -> Genome

Explanation:

A genome is an organism's complete set of DNA including all of its genes. Each genome contains all of the information needed to build and maintain that organism. Chromosomes are the threadlike structures located inside the nucleus of animal and plant cells. A gene is the basic physical and functional unit of heredity.

The material and components that are vital for the growth and functioning of an organism that gets inherited from parent to offspring are the components of genetic information.

From simplest to complex they are arranged as:

DNA ⇒ Gene ⇒ Chromosome ⇒ Genome

DNA is the deoxyribose nucleic acid and is the genetic material that transports the instruction for development and function for growth.

Gene is a unit of hereditary that codes for gene products.

DNA molecules packed as a thread-like structure is called chromosomes.

The entire set of genes that pass from parent to offspring is called the genome.

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The childhood viral disease associated with skin blisters and mild fever is _____.

polio
rubella
mumps
chicken pox

Answers

I believe it should be chicken pox

In this food web, birds would be classified as
A)
carnivores.
B)
decomposers.
herbivores.
D)
omnivores.

Answers

Answer:

D)  omnivores.

Explanation:

The bird consumes both plants and arthropods

Answer:

omnivores

Explanation:

omnivorous consumers. they eat other animals like snails and worms but they also eat berries.

A woman with blood type O has a baby with blood type A. She claims that the baby was fathered by a man with blood type AB. Is this possible?

Answers

Answer:

This is possible.

Explanation:

The man's AB blood will dominate over the recessive O blood of the mother.  The possible outcomes shown by a Punnett Square are A and B children.

Which of the following statements is the of asexual reproduction?
A. It produces offspring
B. It produces genetically identical offspring
C. It produces genetic diversity
D. It produces offspring that are resistant to antibiotic.

Answers

The answer is B because the new cells formed during asexual reproduction are formed by mitosis there is no genetic diversity.

Which gland is known as the "master gland" because it sends chemical messages to many other glands?

Answers

Answer: pituitary gland

What soil horizon is the most important for the growth of plants (agriculture) ?

Answers

Accumulative

the accumulative or B horizon is the most fundamental part of soil from many standpoint

On which side of the mountain would you be most likely to find a forest?

Answers

Answer:

Mountain lands provide a scattered but diverse array of habitats in which a large range of plants and animals can be found. At higher altitudes harsh environmental conditions generally prevail, and a treeless alpine vegetation, upon which the present account is focused, is supported. Lower slopes commonly are covered by montane forests. At even lower levels mountain lands grade into other types of landform and vegetation—e.g., tropical or temperate forest, savanna, scrubland, desert, or tundra.

The largest and highest area of mountain lands occurs in the Himalaya-Tibet region; the longest nearly continuous mountain range is that along the west coast of the Americas from Alaska in the north to Chile in the south. Other particularly significant areas of mountain lands include those in Europe (Alps, Pyrenees), Asia (Caucasus, Urals), New Guinea, New Zealand, and East Africa. The worldwide distribution of mountain lands is shown in Figure 1.

Figure 1: Worldwide distribution of mountain lands.

Explanation:

What leads to variation in a population?​

Answers

Answer:

Genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).

Explanation:

Scientists want to investigate the effects of chronic acidification on a desert ecosystem. Which independent variable are the scientists most likely monitoring in their investigation? a. The amount of fog during different times of the year b. The composition and amount of seasonable melt water c. The daily production of sulfur dioxide by a nearby factory d. The heaviest traffic periods of the year

Answers

The independent variable is the scientists most likely monitoring in their investigation for the investigate the effects of chronic acidification on a desert ecosystem - c. The daily production of sulfur dioxide by a nearby factory

Chronic acidification

Ecosystems result in chemical changes to soil and to surface waters and groundwater as a result of reduction of base cation or H⁺. The major effects of SO2 emission have on the soil system

An increase in contents of total sulfur, organic carbon, and exchangeable Al, leads to a lowering of pH and causes acidification of soil. Fog does not participate in acidification

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Answer: the daily production of sulfur dioxide by a nearby factory

Explanation: it was correct on the quiz

URGENT!!!
A key principle of ethics is acting the same whether or not you are being observed.

True

False

(its agriculture)

Answers

Answer:

If simple subjectivism is true, when one person says X is right and another person says X is wrong, they are having a moral disagreement. False.

PLEASE HELP ASAP Match each word with the phrase that best defines it.
informal
a statement that is objective or unchanging
fact
done in a way that is friendly or casual
formal
a statement that is subjective or based on
interpretation
topic
done in a way that is suitable, appropriate,
or based on guidelines
opinion
the main point of a given subject

Answers

Answer:

fact: a statement that is objective or unchanging

informal: done in a way that is friendly or casual

formal: done in a way that is suitable, appropriate,

or based on guidelines

opinion: a statement that is subjective or based on

interpretation

topic: the main point of a given subject

Match each word with the phrase that best defines it.

1. Fact: a statement that is objective or unchanging

2. Informal: done in a way that is friendly or casual

3. Formal: done in a way that is suitable, appropriate, or based on guidelines

4. Opinion: a statement that is subjective or based on interpretation

5. Topic: the main point of a given subject

What are Phrases?

A phrase is a group of words or a singular word which functions as a grammatical unit. For example, the English expression "the very happy boy" is a noun phrase containing the adjective phrase "very happy".

It can be a single word or a complete sentence. Phrases are used to describe the people, things, or events.

There are following types of phrases. They are:

Noun phrase.Adjective phrase.Adverb phrase.Verb phrase.Prepositional phrase.Gerund phraseInfinitive phraseParticipial phrase

Thus, matching the following words with its phrases

1. Fact: a statement that is objective or unchanging

2. Informal: done in a way that is friendly or casual

3. Formal: done in a way that is suitable, appropriate, or based on guidelines

4. Opinion: a statement that is subjective or based on interpretation

5. Topic: the main point of a given subject

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Put "Sympatric Speciation" in a sentence

Answers

Answer:

A 2008 study suggests that sympatric speciation has occurred in Tennessee cave salamanders.

Explanation:

Hope this helps

How are environmental issues and food production related?

Answers

Answer: Food consumption and production have a considerable impact on the environment.  Food production contributes

Explanation: , for example, to climate change, eutrophication and acid rain, as well as the depletion of biodiversity. It is also a considerable drain on other resources, such as nutrients, land area, energy, and water.

pls ans this qa i will mark u as brainlist ans​

Answers

ans b

Explanation:

milk teeth are less than permanent teeth

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Alamo Cola manufactures a soft drink made with 0.25% peach juice concentrate. What is this percent expressed as a fraction A. 1/4 and 0.25B. 1/4 and 0.0025C.1/40 and 0.025D. 1/400 and 0.0025 Which of the following is a characteristic of the plasma membrane? It is made up of one layer of phospholipids. It doesn't contain any molecules aside from phospholipids. The outward-facing phospholipid tails give it a rough quality. It allows some molecules to pass through but prevents others from doing so. Which components of the female reproductive system are not physically connected? Cervix and vagina Cervix and uterus Ovaries and fimbriae Fimbriae and fallopian tubes is ecosystem generally stable; how is that possible? Please help need done soon Meena cuts a 287-in. long ribbon into 2 pieces in the ratio 3 : 4. What is the length of the longer piece of ribbon? (ASAP) FORco, a country F corporation, wants to open a sales office in the United States. FORco does not form a U.S. subsidiary, but instead operates in the U.S. as a branch. Country F does not have a income tax treaty with the U.S. If FORco loans operating funds to the U.S. branch, when the U.S. branch makes interest payment to FORco, the interest payment will be subject to:____. Si la circunferencia es16 cm, cunto mide el radio? how did nations participating in world war 1 control opinion? why was this important Enter the number that belongs in the green box A restaurant bought 5 pounds of salmon for $42.50. How much would 7 pounds of salmon cost? * What are the inputs and outputs of cellular respiration and photosynthesis?carbondioxideoxygenenergyMatersugarPhotosynthesisCellular RespirationInputsOutputs Read the third stanza of the poem and describe how the speaker seems to feel about the path he did not choose."And both that morning equally layIn leaves no step had trodden black.Oh, I kept the first for another day!Yet knowing how way leads on to way,I doubted if I should ever come back." list the distinguished leaders from the first and second continental congress. Please answer for kind of a lot of points :D Find the product of (x2 + 2x 3)(4x2 5x + 6). (2 points) a 4x4 + 13x3 16x2 + 27x 18 b 4x4 + 3x3 28x2 + 27x 18 c 4x4 + 3x3 16x2 + 3x 18 d 4x4 + 3x3 16x2 + 27x 18 write an equation of the line perpendicular to the given line that contains P in point slope form? P (4,8) y=4x-7 equations with variables on both sides that makes the answer x=9 can some one help me please.... by step by step explanation...... Which incident from Lord of the Flies is used to develop the growing divide between Ralph and Jack?Ralph announces Piggy's nickname to the boys.Ralph and Jack discover a coral reef.Jack protests that he should be chief.Simon walks between Ralph and Jack.