The diagram shows a large pond that dried out and formed into two smaller ponds.
What type of speciation occurred in the fish?
A. allopatric
B. peripatric
C. parapatric
D. sympatric
Answers
Answer:
A. allopatric
Explanation:
Allopatric speciation consists of the geographic separation of a continuous genetic background -population-, giving place to two or more new geographically isolated populations. These separations might be due to migration, extinction of geographically intermediate individuals, or geological events. In this type of speciation, some barriers impede genetic interchange or flow. The populations are separated by a barrier and can not get together and mate anymore. These barriers might be geographical or ecological.
When a geographical barrier emerges, this is known as a vicariant event. Vicariance is the geographical separation of a population imposed by discontinuities in the physical environment that divides populations that originally were continuous. The process of vicariant allopatric speciation involves different steps:
• The emergence of the barrier.
• Interruption in the genetic interchange
• The occurrence of new mutations and their accumulation in time in each population. Slow and gradual differentiation.
• Genetic divergence by natural selection and reproductive isolation makes it impossible for the two groups to mate even if the barrier disappears.
• Prezigotic isolation mechanisms favored by selection once a secondary contact between the new formating species occurs.
So in the exposed example, the original population was composed of fishes living in a pond under the same environmental conditions and selective pressures.
However, with time, the pond dried, causing a decrease in water level and the emergence of a new physical barrier. The original population got separated by a piece of ground, and the original pond turned into two smaller ponds. The physical barrier is now interrupting the genetic flow between both groups.
Animals on each pond suffer from different environmental pressures to which they need to adapt. New mutations occur, leading to genetic divergence between the two separated groups. Two species emerged, red fishes and blue fishes.
Related Questions
Which of the following is a major cause of extinctions?
volcanic eruptions
O earthquakes
solar flares
O overharvesting species
Answers
Answer:
volcanic eruptions
Explanation:
My stummy hurts T_T wut do i do.
Answers
Explanation: IF NOT SERIOUS- Drinking water. ...
Avoiding lying down. ...
Ginger. ...
Mint. ...
Taking a warm bath or using a heating bag. ... please give me brainliest ❤️ ty
Structural changes to genes
1) gene
2)mutations
3)cell
4)chromosome
5)trait
Answers
Answer:
mutation
Explanation:
As such, the nucleotide sequences found within it are subject to change as the result of a phenomenon called mutation
what happens during cytokines
Answers
Answer:
during cytokines the cytoplasm( the liquid center of the cell that holds the organelles in to place) split into two equal half's, and the cell becomes two daughter cells.
You are an endotherm, which is another name for being warm blooded. Warm blooded organisms...
A) maintain a constant body temperature despite the external temperature of their surroundings.
B) use the external temperature to maintain an internal body temperature
I need help
Answers
Answer
the answer is A
although our tempurature can vary depending on extreme hots and colds, or other external factors such as sickness.
Explanation:
HELP PLEASE
A preservation biologist conducted an experiment on two islands (A and B) of similar size, climate, species composition, and richness. Originally, a large population of the same invasive species, a brown tree snake, was present on both islands. It had led to the extinction of some native lizards and forest birds. In her experiment, the biologist removed the brown tree snake from island B but not from island A. She then recorded the number of animal species on each island over a period of 24 months. The data collected is shown in the graph below:
Analyze the data above in terms of interspecific relationships and communities. Which statement best explains the difference in species present on each island over the course of the experiment?
The scientist is the ecosystem engineer of island B.
The brown tree snake was a keystone species on island B.
The brown tree snake is a foundation species on island A.
The brown tree snake is the ecosystem engineer on island A.
Answers
Boiga irregularis or brown snake is a slender, climbing snake with a vertical pupil and large eyes, providing it better nocturnal vision. The species has no natural predator. When the brown snake is accidentally released into the island, it will result in local extinction of the majority of the island's native lizard and bird species.
It will also result in cascading ecological influences by eradicating native pollinators, resulting in the corresponding reduction of the native plant species.
Hence, the correct answer will be fewer birds and more snakes.
Ecosystemic engineers might affect the ecosystem structure and community dynamics. Option D. The brown tree snake is the ecosystem engineer on island A.
What are ecosystem engineer species?
Ecosystemic engineers are organisms that can modify the environment in which they live, influencing other species by changing biotic and abiotic factors and affecting resources availability.
Usually, the interaction of ecosystemic engineers with other species has a consequence on the ecosystem structure and equilibrium.
Based on this concept, many invasive species are considered ecosystemic engineers.
Invasive species are uncontrollable and provoke significant damage to the structure of native ecosystems, affecting endemic species. They produce ecological imbalances in the trophic chains and the dynamics of communities.
By affecting the structure of native ecosystems, they produce cascade effects in resident biota, altering the composition and habits of species in the region and modifying physical and chemical conditions in the environment.
The statement that best explains the difference in species present on each island over the course of the experiment is that The brown tree snake is the ecosystem engineer on island A. Option D.
As we can see, in the presence of the brown tree snake, many species suffered extinction on island A, probably by both direct and indirect effects of the invasive snake.
Island B, on the other hand, kept plenty of species diversity. This is because the snake was removed from the island. Native species managed to increase their population size and to establish again.
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Which of the following statements about the effects of pollution on marine ecosystems is true?
A)
Burning fossil fuels causes a direct increase in the temperatures of ocean water.
B)
Burning fossil fuels causes an increase in the acidity of ocean water.
C)
Pollution in marine ecosystems causes a decrease in the formation of algal blooms.
D)
Addition of warm water has no effect on marine ecosystems.
Answers
Answer:
a Burning fossil fuels causes a direct increase in the temperatures of ocean water.
Explanation:
Answer: A
Explanation:
In pea plants, purple flowers (P) are dominant to white flowers (p). What color flowers would the following genotypes produce in pea plants.
Answers
Describe the interactions between transcription factors and promoter sites that lead to the initiation of transcription. Predict the effect of adding negative regulation molecules to the interaction.
Answers
Answer:
A genetic sequence, the TATA box, is a transcriptions start site and initiates transcription through the formation of RNA polymerase. Negative regulation may inhibit the initiation of transcription and/or repress gene expression.
Explanation:
proteins called transcription factors bind to the TATA box, this triggers RNA polymerase to start synthesizing RNA to DNA
hey besties if you would help me with these questions i think i can finally get myself to fully understand and do the rest of the assignment lol (its very late lol and i’m so close to just giving up)
1. explain how body plan and anatomy enables invertebrate to perform essential functions it needs to survive.
2. explain how body plan and anatomy enables chordate to perform essential functions it needs to survive.
3. explain how body plan and anatomy enables primate to perform essential functions it needs to survive.
Answers
Answer:
1)Invertebrates are known as creatures that do not have backbones. Even though these creatures do not have backbones, they have been uniquely designed in order to survive. According to studies, most of these creatures are found in the sea and one of them is the Star Fish or also called as the Sea Star. Starfish's functions and ability to survive is not the same like other animals which make them unique in a different way. The starfish's body is hard and bony for protection purposes and they exist in a variety of colors for camouflage. Their essential functions in order to survive are as follows:
-The Ability to Regenerate: Starfishes have the ability to grow damaged and lost limbs or even their entire body as long as the center part is still present and intact. And this is their way of reproduction as well.
-Having Tube Feet: Its arms are covered with a suction-like tiny cups of tube feet. This unique design of the starfishes enables them to move and secure themselves, especially on rocks and ocean floors.
-Unique Feeding Ability: Sea Stars don't have mouths nor teeth to ingest food. Rather, these creatures have the ability to push open or turn their stomachs out and digest its food. After digestion, their stomachs retract back to their bodies.
-Vascular System: How starfishes survive does not rely on having hearts, brains and blood. Rather, they use the seawater. The seawater serves as the one the circulates inside the sea stars' bodies and this is when nutrients and oxygen are being transported and absorbed.
2)Keep in mind invertebrates are those who have exoskeletons (outside skeleton) or are hydrostatic (no skeleton). This make up 95% of all animals for example an ant or sponge. For a sponge, all it has is tissues that enable it to allow water to flow out the tops.
Chordata are anything with vertebrates so a simple fish could suffice. THEY HAVE 4 SPECIFIC CHARACTERISTICS: 1.Notochord 2.Dorsal, hollow nerve cord 3.Pharyngeal slits 4.Muscual, an.al tail
This is us, we have thumbs, and vertebrates.
3)The bipedalism of primates puts their heads on a higher elevation and this allows them to see predators or prey from afar hence giving them advantage. Opposable thumbs on the hand and feet allow primates to grasp and handle objects effectively hence are able to make use of tools for hunting and etcetera
Explanation:
What is the relationship between atmospheric pressure and the density of gas particles in an area of decreasing pressure? O As air pressure in an area decreases, the density of the gas particles in that area decreases. O As air pressure in an area decreases, the density of the gas particles in that area increases. O As air pressure in an area decreases, the density of the gas particles in that area remains constant. O As air pressure in an area decreases, the density of the gas particles in that area increases and decreases in an alternating pattern.
Answers
Answer:
As air pressure decreases so does density of gas particles
Explanation:
The integumentary and muscular systems work together interactively for which
main purpose?
a) When a cat feels threatened the muscles under their skin contract to extend
the hairs on their backs and tails.
b)When a baboon is ready to mate it secretes a hormone which turns their
backside red.
c) When a giraffe fights over territory they swing their muscular necks and strike
each other with their bony ossicones.
d)Goldfish and other fish species are covered in scales to protect them from
pathogens and disease.
Answers
Answer: When a cat feels threatened the muscles under their skin contract to extend
the hairs on their backs and tails.
Explanation:
how do neurons transmit signals throughout the body?
Answers
Answer:
When neurons communicate, an electric impulse triggers the realease of neurotransmitters from the axon into the synapse. The neurotransmitters cross the synapse and bind to special molecules on the other side ,called receptors. Receptors are located on the dendrites. Receptors receive And process the messages
Which activity would reduce human sources of greenhouse gases? Increasing the size of livestock herds Monitoring worldwide volcanic activity Using wind energy to generate electricity Researching ways to add methane to the atmosphere
Answers
Answer:
The answer is "using wind energy to generate electricity".
Explanation:
The Wind turbines may not emit water or sulfur compounds (with rare exceptions) and require no water as a coolant. The cost of power produced from energy sources may also be reduced by windmills, which will result in lower overall air quality and hosing pollution, that's why Utilizing wind energy for energy production decreases human greenhouse gas sources.
which of the following is a matter
Answers
Answer:
gas, liquid and solid
Explanation:
hi
Which factor does the moment magnitude scale estimate?
O damage
O location
wave strength
O energy released
Answers
Xylem and phloem carry out specific functions in a plant. Which of the following terms does not apply to either xylem or phloem? a. Specialized cells b. Eukaryotic cells c. Differentiated cells d. Prokaryotic cells
Answers
Answer:
Prokaryotic cells
Explanation:
write two examples of consumers tell whether they are herbivores omnivores carnivors or scavengers
Answers
Answers
Lion,Tiger -Carnivores
vulture- scavenger
Cow,sheep -Herbivores
Man, Pig -Omnivores
In an ecosystem, consumers are organisms that obtain their energy and nutrients by feeding on other organisms. They are a vital part of the food chain, and they come in different sizes and types.
Consumers can be classified into several categories based on what they eat. For example:
Herbivores: These are animals that consume only plants for their food. Examples include rabbits, cows, and giraffes.Carnivores: These are animals that consume other animals for their food. Examples include lions, tigers, and sharks.Omnivores: These are animals that eat both plants and animals. Examples include humans, bears, and raccoons.Scavengers: These are animals that feed on the remains of dead organisms. Examples include vultures, hyenas, and some types of beetles.Consumers play an important role in an ecosystem, as they help to transfer energy and nutrients from one level of the food chain to another. They are an integral part of maintaining the balance and stability of an ecosystem.
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Which term means a volume of a certain rock type of a specific age?
x geologic map
geologic unit
contact
O fault line
The answer is geologic unit
Answers
Thanks. :) this is really :)
Which cities are experiencing clear weather? Which are experiencing rainy weather?
(Help me with questions 3 and 4 in the attachment please :( )
Answers
Answer:
3.) San Fransico and Denver because they are far away from the rain
4.) Dallas because it is right next to the high pressure
What kind of rock? Igneous, Metamorphic, sedimentary. Explain why? plz help!! ASAP
Answers
Answer:
sedimentary
Explanation:
it seems eagle rock has sedimentary features, such as layers, or ripple marks
a response to changes in an ecosystem that results in entire populations moving from one ecosystem to another.
I’m looking for the word for this definition ^
Answers
Answer:
this is a tough one try to remember specific examples from you instructor but for reference when a forest catches fire almost all life moves or dies however producers and decomposes leave behind seeds and will take the new place of the forest since the decomposes can add nutrients to the soil from dead organisms.
suggest why an MRSA infection may have to be treated with many different antibiotics
Answers
Answer:
A trio of antibiotics that had become powerless against MRSA decades ago proved effective in infected mice when used together.
Although more testing is needed, the results suggest that combinations of already-approved antibiotics might add to our options to combat MRSA infections.
Explanation:
Which of the following is NOT a result of cell division
a
reproduction
b
nutrition
c
growth
d
repair
Answers
Answer:
its d repair crlls can't repair itself
Cell division is the division of cells through a series of events. It results in reproduction, growth and repair. Nutrition is not a result of cell division.
What is a cell cycle?Cell cycle is a series of event where a cell grow, differentiate, accumulate nutrients, duplicates its genome and divide to form daughter cells.
Cell cycle has two phases in which one is interphase in which the cell grow and accumulate nutrition, along with this cell duplicates its genome. Second phase is M-phase in which cell division takes place.
Cell division helps cell in reproduction, growth and repair.
Thus, the correct option is b, as nutrition as it is not a result of cell division.
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How can you use what you have learned in Biology to help yourself, family and the planet?
Answers
Answer: I’m not sure what you’ve learned but for me it’s that you shouldnt leave the lights on when you don’t need them, you should switch off the TV when you aren’t using it, if you see a piece of trash pick it up and throw it in a trash can, and recycle
Explanation: HAPPY (late) EARTH DAY!!
the ovary develops into the?
Answers
Answer:
Ovules
I hope this helps!
Answer:
fruit
Explanation:
The ovary itself will mature into a fruit, either dry or fleshy, enclosing the seeds
In a short, detailed paragraph, please answer the following.
What happens in the light reaction of photosynthesis?
What happens in the dark reaction of photosynthesis?
What five factors affect photosynthesis and its rate? How?
Answers
Answer:
Ans - 1 Photosynthesis begins with the light reactions. It is during these reactions that the energy from sunlight is absorbed by the pigment chlorophyll in the thylakoid membranes of the chloroplast.
Ans-2 The dark reactions of photosynthesis occur in the stroma of the chloroplast where they utilize the products of the light reaction. In the dark reaction, plants use carbon dioxide with ATP and NADPH from the light reactions to produce glucose.
Ans-3 The main factors affecting rate of photosynthesis are light intensity, carbon dioxide concentration and temperature.
What does the term maturity group mean?
O the age and skeletal ossification of the animal at slaughter
O the level of ossification in the bones of the animal
O the length of time the beef has been stored after slaughter
O the median age of the herd the animalas from
arbas
Answers
O the length of time the beef has been stored after slaughter
I think
Write 5-6 sentences that explains roles of Heredity and probability.
Answers
Answer:
Probability is a method for determining the likelihood of something uncertain occurring. If you flip a coin, you do not know whether it will be heads or tails, but probability can tell you that there is a 1/2 chance of either happening. Probability is a method used to predict the likelihoods of uncertain outcomes. It is important for the field of genetics because it is used to reveal traits that are hidden in the genome by dominant alleles. Probability allows scientists and doctors to calculate the chance that offspring will inherit certain traits, including some genetic diseases like cystic fibrosis and Huntington's disease.
Explanation:
Which side of the heart contains only deoxygenated blood? Only oxygenated blood?
Answers
Answer: The right ventricle receives deoxygenated blood, The left ventricle receives oxygenated blood from the left atrium
Explanation: