Table of Contents
What is most likely to happen to a population of mice?
What is most likely to happen to a population of mice that becomes isolated on an island? Many different species will form as they evolve to fill different niches on the island.
What is a likely reason for the population changes?
Causes of population decline The size and demographics of the population change when: fewer children are born; families with children move to larger towns and cities; young and better-educated people move to larger towns and cities.
What is most likely happening to the genetic variation of the population of North East Arctic cod?
What is most likely happening to the genetic variation of the population of North East Arctic Cod? The genetic variation in the population is increasing due to selective pressure.
What will most likely happen to the population of moths in this habitat?
What will most likely happen to the population of moths in this habitat? The population of moths will eventually become extinct. A biology teacher asks students to give examples of genetic variations that support the idea that changes in a population’s environment affect genetic variation.
What is the main reason of world population growth?
This rapid growth increase was mainly caused by a decreasing death rate (more rapidly than birth rate), and particularly an increase in average human age. By 2000 the population counted 6 billion heads, however, population growth (doubling time) started to decline after 1965 because of decreasing birth rates.
Which example is most likely to result in exponential population growth?
This accelerating pattern of increasing population size is called exponential growth. The best example of exponential growth is seen in bacteria. Bacteria are prokaryotes that reproduce by prokaryotic fission. This division takes about an hour for many bacterial species.
What is the reason why population growth still increases?
Human population has grown exponentially over the past century. It has done so largely by producing large amounts of food, and learning how to control disease.
Which would most likely increase the genetic variation in a population of organisms?
Sources of Genetic Variation Gene duplication, mutation, or other processes can produce new genes and alleles and increase genetic variation. New genetic variation can be created within generations in a population, so a population with rapid reproduction rates will probably have high genetic variation.
What is the main reason that islands often provide good examples of evolution?
What is the main reason that islands often provide good examples of evolution? They allow for automatic biogeographic isolation. In rock layers, jellyfish fossils are found lower than trilobite fossils, and trilobite fossils are found lower than ammonite fossils.
Which best describes what would occur in a species that has little or no genetic variation *?
Without genetic variation, speciation would occur more slowly. Without genetic variation, speciation would not be possible.
What will most likely happen to the population of moths in this habitat the population of moths will eventually become extinct the moths will evolve?
The population of moths will eventually become extinct. The moths will evolve from dark to light due to a selective pressure. The dark colored moths will experience disruptive selection. The alleles that determine light and dark color in moths will equalize.
What most likely caused the change in the moth population?
When the environment changed, due to pollution, the moth population shifted because light-colored moths became easier to see so they were eaten more often. Organisms that survive have a better chance of reproducing so the population continues to grow.
Why did the population of peppered moths change?
The evolution of the peppered moth is an evolutionary instance of directional colour change in the moth population as a consequence of air pollution during the Industrial Revolution. The frequency of dark-coloured moths increased at that time, an example of industrial melanism.
What are the 3 factors of population growth?
Three primary factors account for population change, or how much a population is increasing or decreasing. These factors are birth rate, death rate, and migration.
What are the causes of population growth in India?
ADVERTISEMENTS: Some of the most important causes of population growth in India are as follows: 1. Widening Gap between Birth and Death Rates 2. Low Age at Marriage 3.Other Causes. Widening Gap between Birth and Death Rates: Low Age at Marriage: High Illiteracy: Religious Attitude towards Family Planning: Other Causes:.
What is the main cause of increase in population in India?
The two main common causes leading to over population in India are: The birth rate is still higher than the death rate. The fertility rate due to the population policies and other measures has been falling but even then it is much higher compared to other countries.
What does exponential growth result in quizlet?
What does exponential growth result in? a population explosion.
What does exponential growth result in?
In exponential growth, a population’s per capita (per individual) growth rate stays the same regardless of population size, making the population grow faster and faster as it gets larger. In nature, populations may grow exponentially for some period, but they will ultimately be limited by resource availability.
Which population is most likely to be growing rapidly?
India is expected to overtake China as the world’s most populous country by 2027. On a percentage basis, all 10 countries that are projected to experience the biggest growth in population by 2100 are in Africa, led by Niger (581% increase), Angola (473%) and Tanzania (378%).
What are the 4 factors that affect population growth?
Population growth is determined by rates of birth, death, immigration, and emigration.
What causes population growth to slow down?
Limiting factors are resources or other factors in the environment that can lower the population growth rate. Limiting factors include a low food supply and lack of space. Competition for resources like food and space cause the growth rate to stop increasing, so the population levels off.
What happens if the population increases?
With population expanding at such a rapid pace, the world will eventually become overcrowded. Population density will increase and global warming, rising tides and increased severity of weather will cause the amount of viable land to decrease.
Why does genetic variation increase the chance that some?
A genetically diverse population of individuals is more likely to survive than a population of individuals with similar genetic makeup. Variation allows some individuals within a population to adapt to the changing environment and natural selection allows the expression of those beneficial traits to persist.
What are the causes of variation during reproduction Class 10?
The two main causes of variation are mutation and genetic recombination in sexual reproduction.
How does meiosis increase the genetic variation in the population?
Genetic variation is increased by meiosis Because of recombination and independent assortment in meiosis, each gamete contains a different set of DNA. This produces a unique combination of genes in the resulting zygote. Recombination or crossing over occurs during prophase I.
