The approximately 600 species of cichlids in East Africa’s Lake Victoria have largely resulted from sympatric speciation. The closely related cichlids species P. pundamilia and P. nyererei are thought to have arisen by sexual selection. Mate choice by females strongly favors males of their own species that have different body colors. In recent years, pollution has caused the water of Lake Victoria to become turbid in some areas. Hybrids of P. pundamilia and P. nyererei were produced and the gene pools of the two species have started to fuse, creating a new hybrid species.   In this process, what are the conditions that led to the fusion of P. pundamilia and P. nyererei? A. Only the prezygotic reproductive barrier is not complete for the two species. B. Only the postzygotic reproductive barrier is not complete for the two species. C. Both the prezygotic and the postzygotic reproductive barriers are complete for the two species. D. Both the prezygotic and the postzygotic reproductive barriers are not complete for the two species.

Q: A species is a group of individual organisms that interbreed and produce fertile, viable offspring.…

A: The change in heritable features in a population of biological people over numerous generations is…

Q: in the future there may be more than one species of ostrich ? True or false 2)There is evidence of…

A: Development of one species takes a great deal of time because many factors operate to evolve a…

Q: How does one species diverge from another? (When do we call a group a new species—and how does that…

A: Microevolution is evolution on a small scale within a single population. The process by which a new…

Q: Clade A began diversifying 20 million years ago. There are 33 living species in Clade A and 6…

A:

Q: What are examples for gene flow? Select all that apply A distinct population of iguana drift to a…

A: Gene flow is the transfer of genetic material from one population to another. It occurs when…

Q: true or false, Sexual selection may lead to sympatric speciation

A: Speciation is a term which describes the process in which new species forms from the existing…

Q: In the IUCN Red List(2004), what does ‘Red’ represent?

A: IUCN stands for International Union for Conservation of Nature. This organization works for the…

Q: A, B, C, and D are all species that live in arctic climates. Note that species B's temperature…

A: The above question is related to the species living in arctic climates. Different species adapt to…

Q: Between Tenerife and La Gomera, which island would be expected to have a greater number of species?…

A: The term biodiversity refers to the diverse living organisms including bacteria, plants, animals,…

Q: Aerobic organisms are dependent on autotrophs. One reason for this dependency is that most…

A: Hello. Since your question has multiple parts, we will solve the first question for you. If you want…

Q: The process by which many new species arise in a relatively short period of time is known as________…

A: A species refers to a group of the individual organism which can interbreed and produce viable…

Q: r-selected species display all of the following traits, except

A: R selected species are also known as R strategists. Broadly there are two methods to go about…

Q: South America North America Pacific Panama Caribbean Panama The cladogram above illustrates the…

A: Speciation is the mechanism by which organisms develop into distinct species.

Q: What is Allopatric speciation? A) When a population is separated from the main group by a barrier…

A: Allopatric speciation : Allopatric speciation is  the process by which a physical barrier separates…

Q: As coral reef communities continue to experience ocean acidification and bleaching, a population of…

A: There are many reasons for decline in coral reef communities. The first and foremost being the human…

Q: Which of the following is an example of postzygotic reproductive isolation?a. Sperm of species A…

A: A group pf similar organisms which are able to interbreed to produce fertile and viable offspring is…

Q: Lake Malawi in Africa is home to about 200 species of allopatrically speciated cichlid fish.…

A: When two populations of the same species are isolated from each other due to geographic changes then…

Q: When a species diverges into two new species over time. This is referred to as

A: Evolution is a process of change of heritable characteristics over time. Genes are inherited from…

Q: Choose True for yes and False for no, for each of the statements 1) The distribution of the two…

A: Given,          A,B,C species share a common ancestry but they are present in different places .And…

Q: A few finches from the mainland get caught in a strong wind and end up colonizing a new island.…

A: Hardy Weinberg (HWE) principle – In HWE the genotype frequencies and allele frequencies of a…

Q: 29. Sympatric speciation describes populations that a have sexual dimorphism b) look the same…

A: Question number 29. The type of speciation where reproductive isolation occurs between the…

Q: Pre-mating barriers to reproduction often evolve relatively late in the process of speciation.…

A: Reproductive barriers are barriers that prevent reproduction between two different groups of…

Q: Explain why parapatric speciation is more likely to occur in sedentary organisms

A: Parapatric speciation occurs when new species originate from a single ancestor while residing in…

Q: True or false? The biological species concept distinguishes two species based on the degree of…

A: Biological species concept,a species is the group of organisms that can mate with one another to…

Q: Over time, enough genetic variations can develop within a population to cause it to undergo…

A: According to the biological species concept, organisms belong to the same species if they can…

Q: Consider this example. Shorebirds on the Eastern coast of North America feed on the mollusks and…

A: Speciation is the evolutionary process by which new and unique species emerge. Species develop…

Q: A group of birds colonize an island.  Over time, they become different from the mainland source…

A: A group of birds colonize an island.  Over time, they become different from the mainland source…

Q: Consider the graphic that is presented and depicts the end-point for the following scenario. At…

A: Cladogram is a kind of diagrammatic tree which represents the relationship between the different…

Q: Two closely related Aster species occupy two different habitats. The first one (Aster 1) lives in a…

A: The relation between seed size, number of seeds and exposure to light are very crucial for each…

Q: Over the years, you notice that a chipmunk that has been making narrow tunnels under trees in your…

A: Jean-Baptiste Lamarck popularly known as Lamarck is most famous for his evolutionary concept,…

Q: 18. (07.07 HC) Due to its location, Hawaii does not have very many land birds. The Hawaiian…

A:

Q: Which scenarios are examples of reproductive barriers between closely related species that can cause…

A: Reproductive barriers are also known as reproductive isolation or mechanism. Reproductive barriers…

Q: Which of the following models, that attempt to explain human origins and dispersal, no longer is…

A:

Q: When the isthmus of Panama (land bridge that connects north and south America) arose about 3 million…

A: Introduction The Isthmus of Panama is the narrow strip of land that connects North and South…

Q: Swordtails, platyfish and Poecilia species are incapable of interbreeding with each other but…

A: Biological species defines the ability of two organisms to mate and produce offspring successfully…

Q: Assume that you are studying the evolution of anti-predator behavior in two species of butterfly.…

A: Predators are the organisms that preys upon other organisms. In ecology, predators are those animals…

Q: ompare and contrast between the following a) allopatric speciation and sympatric speciation.…

A: There are various similarities and differences between the above-mentioned forms of speciation. This…

Q: Speciation can occur when two populations of a species become separated from each other. What is the…

A: The objective of the question is to understand why speciation, the formation of new and distinct…

Q: Which of the following is a post -zygotic barrier that can cause reproductive isolation ?

A: The barriers or differences in geographical, behavioral, physiological, or genetic factors prevent…

Q: An invasive species specialist often observes an introduced frog species spawning in small ponds…

A: Reproductive isolation can be defined as the phenomenon in which the animals are unable to…

Evolutionary lineages

An evolutionary lineage is a series of populations of organisms that descend from a common ancestor. Each species in the lineage is the direct consequence of evolutionary change from a common ancestor. A phylogenetic tree is generally used to display lineages visually. Lineages are components of the phylogenetic tree of life. Molecular systematics procedures are widely used to predict lineages.