Answer:
The chromosomes in all the cells of the body, except for the sex cells, are diploid in number. The somatic cells divide by the process of mitosis.
The chromosomes in the sex cells are haploid and divide by the process of meiosis. This is because when an egg cell and a sperm cell will join, then each half of the chromosomes present in both the cells will pair up to maintain the chromosome number of the species.
How might advancements in genetics and DNA affect an agriscientist’s career?
Final answer:
Advancements in genetics and genomics are revolutionizing agriscientists' work by allowing for the development of crops with enhanced qualities, such as drought tolerance and pest resistance, thereby improving the quality and quantity of crop yields.
Explanation:
Advancements in genetics and DNA technology have a significant impact on the career of an agriscientist. These advancements, particularly in the area of genomics, can considerably reduce the trials and errors in agricultural research. This has implications for improving the quality and quantity of crop yields through the development of genetically modified organisms (GMOs), by linking specific traits to genes or gene signatures. Agriscientists use genomic data to identify desirable traits and then transfer these traits to other organisms to create hybrids with superior qualities. This can lead to the creation of crops with enhanced characteristics such as increased resilience to drought conditions, resistance to pests, or improved nutritional content.
Furthermore, the application of genomics in agriculture allows for more efficient crop breeding, thereby accelerating the development of varieties with the most desirable features. Scientists are discovering new ways genomics can enhance agricultural production, from creating products that can withstand challenging environmental conditions to increasing the nutritional value of the crops. As such, agriscientists who are skilled in genomics and genetic engineering are crucial for driving innovations in crop improvement, ensuring sustainable agricultural practices, and meeting the food demands of a growing global population.
Which was the original source of atmospheric oxygen? Question 4 options: autotrophs cooling of Earth’s crust formation of the oceans volcanoes
Final answer:
The original source of atmospheric oxygen on Earth was autotrophs, specifically cyanobacteria, which produced oxygen as a by-product of photosynthesis over 2 billion years ago, leading to the development of more complex life forms.
Explanation:
The original source of atmospheric oxygen on Earth was autotrophs. More specifically, it was cyanobacteria -- early phototrophic organisms that evolved the capability for photosynthesis. Photosynthesis uses solar energy to convert carbon dioxide and water into glucose and, importantly, oxygen as a by-product. Cyanobacteria began to significantly contribute to the oxygenation of the atmosphere over 2 billion years ago. This process eventually gave rise to more complex life forms by increasing the oxygen content in the atmosphere and created an ozone layer that protected emerging life from harmful ultraviolet radiation.
While volcanic activity also played a role in shaping the early atmosphere by releasing various gases, it didn't contribute to the oxygenation of the atmosphere until later, when plant life became more widespread, and photosynthetic activity increased oxygen production.
Zooplankton get their energy from
phytoplankton
grasses
photosynthesis
small fish
Answer:
Zooplankton -tiny aquatic habitat organisms- gets their energy from phytoplankton consumption.
Explanation:
Zooplankton, or animal plankton, is characterized by being heterophosphoric organisms, obtaining its energy by consuming organic matter.
The main food source of zooplankton is phytoplankton, although they can also feed on organic waste, from the same zooplankton or even bacteria.
Zooplankton is composed of a very small fauna that includes single-cell organisms -such as protozoa and protists- fingerlings, larval forms of mollusks, crustaceans and aquatic arthropods.
Learn more:
https://brainly.com/question/3931984
Evaluate several popular movies and books involve mutated organisms. Are these transgenic organisms a possibility why or why not?
Movies like GMO OMG, species and X-men usually involves mutated organisms as their main subject. These transgenic organisms can possibly be created but certain of their species is banned considering the controversy that will create.
Explanation:
Mutated organisms are nothing but genetically modified organisms that will be developed by altering or modifying the genome of plants and animals through some breeding techniques that are followed traditionally for many number of years.They involve artificially selecting specific traits which results in the formation of a new organism.This concept is well used and explained in many of the movies, books etc.They are some possible in the modern world and an example for scientifically created mutated organism is the hairless cat.Though they are possible practically,they are not often preferred considering the controversy and risk such as Reducing the metabolism of the actual organism and their growth rate. Thus they are possible but are not preferred.Judging and evaluaing advertisement requires confusing. thinking. because
Complete Question:
Judging and evaluating advertisements requires critical thinking because _______.
a. advertisements can contain confusing, misleading information
b. all advertisements contain false information
c. advertisers always want to convince consumers to buy unnecessary items
d. truth in advertising laws ensure the accuracy of information in advertisements
Answer:
Judging and evaluating advertisement requires critical thinking because "Advertisements can contain confusing, misleading information".
Explanation:
Advertisements are the sources of information regarding policies, commodities, recruitment, tenders etc. People find it in newspapers, news channels, other television and you tube channels. Relying upon their accuracy depends upon the standard and image advertising channel have in market.
Sometimes confusion arise being human and find irrelevant or illogical content of advertisement, which can mislead or increase complexity for customers and portray poor image of advertising agencies. Therefore, in the era of huge availability of advertising sources, the information is needed to picked up from appropriate sources by judging and evaluating properly.
What was first responsible for changing the formerly poisonous atmosphere to an oxygen-rich atmosphere, as we have today?
Answer:
"Photosynethic bacteria (Cyanobacteria)" was first responsible for changing the formerly poisonous atmosphere to an oxygen-rich atmosphere, as we have today
Explanation:
The cyanobacteria are photosynthetic bacteria that are oxygenic. They extract energy from the sun, take up carbon dioxide and release oxygen. Unlike plants and algae, cyanobacteria comprise chlorophyll, and by carbon fixation transform carbon dioxide into sugar.
Cyanobacteria are prokaryotic species, unlike eukaryotic plants and algae. A phylum composed of free-living bacteria and endosymbiotic plastids (a Gloeomargarita sister group found in certain eukaryotes) is called as Cyanophyta or Cyanobacteria. These also contain multiple yellowish carotenoids, the blue phycobilin pigment and, in certain organisms, the red phycoerythrin pigment.
Which of the following Gametes can be formed from the following genotype: TtYy.
A. YY
B. tY
C. ty
D. TY
E. Ty
F. Tt
Gametes can be formed from the following genotype: TtYy are
B. tY
C. ty
D. TY
E. Ty
Explanation:
The gametes are formed by meiosis of the cell.
The cell with genotype TtYy will form four different types of gametes.
The cross is shown in the diagram attached.
The alleles of TtYy separates and form gametes by all possible combinations.
Four types of gametes formed by TtYy are - tY, ty, TY, Ty
3. What material does the nucleus contain? What is the purpose of this material? The nucleus contains "the cell's genetic material, DNA." DNA makes protein molecules to help with almost every cellular process.
Answer:
The nucleus contains "the cell's genetic material, DNA." DNA makes protein molecules to help with almost every cellular process
Please said thanks
The students would like to communicate their findings to scientists all around the world. Which name should the students use to describe this animal so the scientists all around the world can understand?
Chinchilla rodentia
Lagidium viscacia
Chinchillidae Lagidium
Southern viscacha
Students should use the scientific name 'Lagidium viscacia' to communicate their findings about the Southern viscacha to scientists worldwide, as it is universally recognized.
The name that students should use to describe an animal so that scientists all around the world can understand is the animal's scientific name. In this case, the scientific name for the Southern viscacha is Lagidium viscacia. This binomial nomenclature is universally recognized and allows scientists from any part of the world to know exactly which species is being referred to, regardless of the local or common name used in different languages or regions. By using the scientific name, students ensure that their communication is clear and that their research can contribute to the global understanding of the species.
How is dna molecule replicated
Answer:
"During DNA replication, the DNA molecule separates into two strands, and then produces two new complementary strands following the rules of base pairing. Each case strand of the double helix of DNA serves as a template, or model, for the new strand."
Explanation:
If you have any questions feel free to ask in the comments - Mark
Also when you have the chance please mark me brainliest.
Pollution from a single, identifiable source is called
source pollution.
Pollution from a single, identifiable source is called point source pollution.
Explanation:
The things that we use for the production of anything releases some wastes products that act as a pollutant to the environment. these are classified into two main category such as Point source and non point source pollution. In non point source pollution the cause for the pollution is from many places and it is very tedious to find the source of the pollution.
When a pollution occurs from a single and also an identifiable place or source then it is called as Point source pollution. Some of the examples of point source pollution includes, Factories, power plants, Municipal wastewater treatment plants,etc.
Final answer:
Pollution from a single, identifiable source is referred to as point-source pollution, which is easier to manage than nonpoint-source pollution due to its identifiable nature.
Explanation:
Pollution from a single, identifiable source is called point-source pollution. This type of contamination of the environment occurs when pollutants are released into the environment from a discernible, confined place. Examples of such single-source pollution include discharges from a pipe at a factory, overflows from combined sewer systems, leaks from storage tanks, or chemical spills. Conversely, nonpoint-source pollution is diffuse and originates from multiple, distributed sources.
In comparison, point-source pollution is generally easier to identify, monitor, and regulate, because the source is known. Nonpoint-source pollution, on the other hand, is more challenging to control, as it comes from a multitude of sources, like runoff from urban areas or agricultural fields that carry contaminants into bodies of water. It's important to understand the difference between these two types of pollution to effectively tackle environmental contamination.
Why are estuaries, such as the Pamlico Estuary, so important?
Answer:
An estuary can be described as an area of brackish water where different rivers or streams meet the open sea. Hence, an estuary forms a transition zone between an river environment and a marine environment.
Estuaries hold a lot of importance and are referred to as the nurseries of the sea. The estuary are home to many unique kinds of organisms. Certain kinds of fishes and shellfishes which humans consume cone from this area of the sea. There are high levels of nutrients moving in the estuary zone of the sea. Due to its shallow water, Pamlico estuary provides opportunities for fishing, crabbing and water- sports activities.
Estuaries like the Pamlico Estuary are crucial due to their commercial and biological significance.
Estuaries, such as the Pamlico Estuary, play a significant role both commercially and biologically.
They are home to many of the world's metropolitan areas, serving as ports for industrial activity and supporting large human populations.Biologically, estuaries are incredibly important because they act as nursery grounds for many species of fish, birds, and invertebrates. The mixing of fresh and salt water in estuaries creates a brackish environment that is rich in nutrients, promoting biodiversity and sustaining various life forms.Salinity in estuaries varies with the influx of seawater and outflow of freshwater, which influences the types of organisms and their adaptations. Many species in estuaries have developed specialized adaptations to cope with these varying salinity levels.Furthermore, estuaries contribute to the economy by providing areas for industrial activities and ports. These areas also offer recreational opportunities and help in filtering pollutants from rivers before they reach the ocean, thus maintaining environmental health.How does compact bone differ from spongy bone?
Image result for How does compact bone differ from spongy bone?
Whereas compact bone tissue forms the outer layer of all bones, spongy bone or cancellous bone forms the inner layer of all bones. Spongy bone tissue does not contain osteons that constitute compact bone tissue. Instead, it consists of trabeculae, which are lamellae that are arranged as rods or plates.
Explanation:
What is malaria ?❤️♀️
fever caused by a protozoan parasite that invades the red blood cells.
Answer:
a tropical disease caused by a parasite
Explanation: it it a mosiqto bite from tropical islands
Which of the following types of solutions should be used when preparing a wet mount? (Circle one.) a. hypertonic b.hypotonic c.isotonic
The solution of wet mount should be hypertonic solution.
Explanation:Wet mount is a preparation where the specimen is made to place in a glass slide and a drop of solution is put on the slide. The wet mount is primarily used to see vaginal swab, bacterial slides etc.
Here the wet mount uses a hypertonic solution which is primarily 30 to 40% salt solution in distilled water. The function of this solution is to draw water from the cells and to keep them dehydrated.
The dehydration of the cells maintain their shape, and help to keep any stain if provided. So wet mount uses a hypertonic solution.
Which equation best represents the process of photosynthesis
Which of the following does not cause blood pressure to rise? Growing taller eating animal fats, being young?
Answer:
Being young
Explanation:
Being young does not cause blood pressure to rise. In contrast, eating animal fats can lead to increased blood pressure due to their high cholesterol content. Growing taller could potentially lead to increased blood pressure, particularly during periods of rapid growth.
Explanation:Out of the options given - growing taller, eating animal fats, and being young - the one that does not cause blood pressure to rise is being young. Typically, blood pressure tends to increase as people age, largely due to factors such as hardening of the arteries, hormonal changes, and lifestyle factors.
Eating animal fats can increase blood pressure due to the high levels of cholesterol and unhealthy fats they contain. Similarly, while growing taller in itself does not cause an increase in blood pressure, rapid growth, for example in puberty, can be associated with a temporary increase in blood pressure.
However, it's important to note that individual blood pressure levels can vary depending on a variety of factors including genetics, physical activity levels, and diet.
Learn more about Blood Pressure here:https://brainly.com/question/30088024
#SPJ12
In organisms blank are encoded in segments of its Chromosomes called blank
Answer:
Traits, genes
Explanation:
Answer: Chromosomes are made of DNA and proteins . chromosomes called genes.
Explanation:
How does energy get transferred from the Sun to a cow?
Answer:the sun provides food for he cow because it makes food grow
Explanation:
Sierra decides to write down everything she likes to eat. Then, she draws branches under each animal on the list and writes everything they like to eat, and so on until she is down to all plants at the bottom of the page. What did Sierra make a diagram of?
What are the roles of producers consumer, and decomposers in an ecosystem
Answer:
Producers Create Energy for the Consumers
Consumers "Use" or Consume Things of the environment
Decomposes eat or destroy the dead consumers and producers to help the environment grow
Answer:
thank youu!
Explanation:
A pyramid of energy has 100 units of energy available for the first traffic level. How many units would be available for primary consumers? How did you calculate this?
What is the order of these for geology?
Answer:
The correct sequence is 2,3 and finally 1.
Explanation:
Proper order of the given passage is:
From scientific evidence, the early atmosphere about 3.5-3.8 billion years ago was the mixture of gases CO2, CO, N2, H2, NH3, CH4.Organisms performing photosynthesis(aerobes) released free oxygen as waste product. This oxygen was poisonous to the anaerobes and anaerobes declined.As the oxygen in the air increased, aerobes became dominated and anaerobes were forced to live in the dark.
How have modern advancements allowed this modern-day scientist to do research in a way that Darwin couldn't?
Answer: unlike modern-day evolutionary geneticists, Darwin did not have the knowledge of modern-day genetics or the ability to sequence the genome. So, Darwin couldn’t have determined that the trait of flightless wings was likely caused by a genetic mutation.
Explanation:
Answer:
Unlike modern-day evolutionary geneticists, Darwin did not have the knowledge of modern-day genetics or the ability to sequence the genome. So, Darwin couldn’t have determined that the trait of flightless wings was likely caused by a genetic mutation.
Explanation:
Answer from PLATO
Which sentence best explains the ideas of the comm with respect to human population growth? A. Each birth adds another person to the population
Complete Question:
Which sentence best explains the idea of the tragedy of the commons with respect to human population growth?
A. Each person overuses air, water, land, and food resources.
B. Each birth adds another person to the population.
C. People have more in common than they realize.
D. People cannot help but be guided by the interests of the group.
Answer:
"Each person overuses air, water, land, and food resources" best explains the ideas of the tragedy of the commons with respect to human population growth.
Explanation:
In short, human rationality and collective rationality are at odds with each other and inconsistent within the tragedy of the commons. In the foreground, Hardin characterizes the population problem as a Commons tragedy since the Earth is finite and therefore can not continue to cater the growing human population.
A service must be scarce, rival in use, and non-exclusive for a Commons catastrophe to occur. Alternatives to commons catastrophe include enforcing individual liberties, controlling policy, or creating a collective action system.
Final answer:
Population growth is affected by births, deaths, and migration, not just new births. Some countries do have negative growth rates, and the current global population is around 7 billion, reached between 2011 and 2012.
Explanation:
No, new births are not solely responsible for the increase in population size. Population growth is influenced by several factors, including fertility, mortality, and migration. Other types of data that would help determine the reasons for this increase in population size include death rates, migration statistics, and age demographics, which provide insight into the mortality and movement patterns that also affect population dynamics. True or False. Some countries have a negative growth rate. This statement is true, as some countries experience population decline due to various factors such as low birth rates and high emigration. The current population of the Earth is around 7 billion. It was between 2011 and 2012 that we reached this milestone, demonstrating an exponential increase from previous billions and the ongoing trend towards higher global population numbers.
the following is an example of an indirect observation?
A.
using tools such as a thermometer or rain gauge to take measurements
B.
counting rings on a tree stump to determine its age
C.
counting the number of bald eagles that land near a river
D.
using a live video to observe nesting owls
Active transport requires energy because it usually involves the movement of
A.
substances from an area of low concentration to an area of high concentration.
B.
substances from an area of high concentration to an area of low concentration.
C.
substances in the gas phase, such as oxygen and carbon dioxide.
D.
substances that can easily pass through the cell membrane, such as water.
Active transport requires energy because it usually involves the movement of substances from an area of low concentration to an area of high concentration.
What is active transport?Active transport is the movement of a substance into or out of the cell. The movement is against the concentration gradient, and the movement is from lower concentration to higher concentration.
Example is diffusion.
Thus, the correct option is A.
Learn more about active transport
https://brainly.com/question/12133248
#SPJ2
what type of commensal relationship is orchids growing on branches of trees ?
Classification Activity Worksheet Instructions: Read each myth (untruth). Reword it to make a factual statement. Then, give two to three reasons why the myth is untrue. Use complete sentences and support your answer with evidence, using your own words. Myth: A dead organism is the same as a nonliving thing in science. Fact: Evidence: Myth: The Linnaeus system of classification will always stay the same. Fact: Evidence: Myth: Tigers and goldfish are not related. Fact: Evidence: Myth: An organism's kingdom only describes physical characteristics. Fact: Evidence: Myth: Mammals and plants don't belong in the same domain. Fact: Evidence: Your Turn Come up with another myth about the classification of organisms. Then, give two to three reasons why the myth is untrue. Use complete sentences and support your answer with evidence, using your own words. Your myth: Fact: Evidence: I JUST NEED HELP WITH #6
PLZZZZZ I WILL GIVE BRAINLEST!!!
Myth: A dead organism is the same as a nonliving thing in science.
Fact: According to science when an organism dies it not different from a non-living thing
Evidence: Non-living things are fundamentally different than living organisms mainly because of the differences in their chemical and biological structures. Living things are made of biomolecules, complex polymers like lipids, proteins, and polysaccharides based on carbon and non-living things are usually made of minerals and other inorganic compounds. So, even if an organism is dead, we can determine that it was a living thing by analyzing its chemical structure.
Myth: The Linnaeus system of classification will always stay the same.
Fact: Carl Linnaeus, a Swedish scientist from the 18th century came up with the perfect classification system that is used up to this day unchanged.
Evidence: Although this system is still widely used to classify living organisms, it has gone through some changes. Linnaeus considered kingdoms to be the utmost level of classification, but biologists today recognize a level above kingdoms, the level of domains. Some scientists also argue that classifying organisms into kingdoms should be abandoned, because not all organisms traditionally divided into kingdoms have the same origin.
Myth: Tigers and goldfish are not related.
Fact: Tiger is a top predator in the jungles of Asia and the goldfish is a small species of fish selectively bred in China and they are not at all related.
Evidence: All living things have the same way of transferring genetic information, trough the DNA molecule. Genetic analyses showed that the last common ancestor (LUCA) of all organisms on Earth has lived 3,5 billion years ago. After that, all living things diverged into separate groups. Tigers and goldfish both are animals and have a common ancestor. Tigers may be in a close relationship with other big cats like lions and cheetahs, but they all have a common ancestor with the goldfish since all vertebrates have a common ancestor that was an ancient fish species.Myth: An organism's kingdom only describes physical characteristics.
Fact: It is commonly believed that organisms are classified into kingdoms only based on their physical characteristics.
Evidence: Before the rise of molecular biology and genetics, this may have been true, but with new scientific methods and techniques, evolutionary relationships and genetic similarities are also taken into consideration when classifying an organism.
Myth: Mammals and plants don't belong in the same domain.
Fact: Mammals, being a group of animals do not belong in the same domain as plants. Evidence: All living organisms are divided into three domains: Bacteria, Archaea and Eukarya. All of the organisms that possess a eukaryotic cell, plants, animals, protists, and fungi are in the Eukarya domain. Therefore, mammals and plants belong to the same domain, the Eukarya domain.
Your myth: Humans are not animals.
Fact: Human beings are not at all related to other species and are completely different than animals.
Evidence: Although humans possess some unique features not found in other species, we are very closely related to apes, and broadly to primates, other mammals, animals, and organisms. The chimpanzee is our closest relative, and we share up to 98% of DNA sequence with them. It is estimated that our common ancestor lived around 6 million years ago.
Answer:
Myth: A dead organism is the same as a nonliving thing in science.Fact: A dead organism actually differentiates from a nonliving one.
Evidence: Nonliving things lack the characteristics of life and will never possess them, according to science. Dead things, unlike nonliving things, lose some of their life characteristics when they die. As a result, comparing the terms "dead" and "nonliving" is incorrect. A book, for example, is not alive, whereas a bug is dead.
2. Myth: The Linnaeus system of classification will always stay the same.
Fact: It will not stay the same, and it will change with time.
Evidence: Since Linnaeus' time, our understanding of the diversity of life has led to the recognition of six kingdoms, instead of the previous three. The Linnaean system, although evolved, is still utilized today to classify organisms. Because we continually find new organisms, there is definitely a chance the system will change.
3. Myth: Tigers and goldfish are not related.
Fact: Tigers and goldfish are related in some way.
Evidence: In the Eukarya domain, Animalia kingdom, and Chordata phylum, there are two organisms that should be considered listed here that are in the lesson, the fish and the cat. The fish has a wide variety of fishes, which could also include the goldfish. The cat also has a relative that should be nicely listed, which is the tiger. That means, because the fish could be counted as goldfish and the cat is a relative to the tiger, tigers and goldfish are technically related.
4. Myth: An organism's kingdom only describes physical characteristics.
Fact: An organism's kingdom truly describes more than just physical characteristics.
Evidence: An organism's kingdom actually describes more than that, narrowing down so they could be specific. For example:
The level of organization (broadest to narrowest):
Domain.Above the kingdom level, the domain is the highest taxonomic rank in the classification system.
Kingdom.A kingdom is the second highest taxonomic level, following domain. Kingdoms are broken down into smaller groupings known as phylum.
Phylum.A phylum is a level of classification or taxonomic rank that is beneath kingdom and yet above class. Phylum is broken down into smaller groupings known as class.
Class.A class is a taxonomic rank that is higher than the order but lower than the phylum. Class is broken down into smaller groupings known as order.
Order.In the taxonomic system, the order is under the class as well as above the family. Order is broken down into smaller groupings known as family.
Family.A family is divided between two parts: order and genus. Family is broken down into smaller groupings known as genus.
Genus.The classification hierarchy is divided between family along with species. Genus is broken down into smaller groupings known as species.
Species.Species is the species with the lowest taxonomic rank and the narrowest unit or classification category.
5. Myth: Mammals and plants don't belong in the same domain.
Fact: Mammals and plants in fact do belong in the same domain in certain instances.
Evidence: In the Eukarya domain, mammals such as insects, fish, jackal and dogs are actually categorized with plants. This is because A domain is the classification system's largest level of arrangement, meaning that this has the most options.
Your TurnCome up with another myth about the classification of organisms. Then, give two to three reasons why the myth is untrue. Use complete sentences and support your answer with evidence, using your own words.
Myth: Rabbits are not at all related to foxes.
Fact: Foxes may pray on ribbits, but they are still nevertheless related.
Evidence: It's almost unbelievable, but the little-known and little-established fact is that ribbits, and foxes are actually very related with each other. Their connection extends beyond the Eukarya domain to the Animalia kingdom, Chordata phylum, and even to the Mammalia class. They may be against each other, but their bloodline isn’t.
Explanation:The previous answer is so wrong it hurts my brain, so I'm stating the actual answers.
The images show two species of tree frogs in a particular region.
The gray tree frogs are adapted to the trees of the woodlands, while the green tree frogs can survive in woodlands or grasslands. The gray frog was abundant in the woodlands. Because of climatic changes, most of the trees in the region died, and the woodlands changed to grasslands. In such a case, the .
The gray tree frog is closely related to the green tree frog genetically, but they have different mating calls. This suggests that specia
Answer:
Is adapting a new climate change
Explanation:
If it help please follow me on brainly.
Answer:
The gray tree frogs are adapted to the trees of the woodlands, while the green tree frogs can survive in woodlands or grasslands. The gray frog was abundant in the woodlands. Because of climatic changes, most of the trees in the region died, and the woodlands changed to grasslands. In such a case, the population of gray tree frogs will likely decrease .The gray tree frog is closely related to the green tree frog genetically, but they have different mating calls. This suggests that speciation occurred because of prezygotic isolation
Explanation:
The terrain is changing to a point in which it would be unsuitable for grey tree frogs and highly suitable for green tree frogs.
Prezygotic isolation prevents the fertilization of eggs. If the two frogs have different mating calls then they won't mate with eachother.