The measure of variation which exists in the genetic makeup of any particular individual within a population is genetic variation. There are several key features and advantages associated with the genetic variation as it is an important factor causing evolution allowing natural selection thus leading to increase or decrease the frequency of alleles in a population.
The other factors causing genetic variation include random mating, mutation, random fertilization and recombination during meiosis between the homologous chromosomes.
The main advantage of genetic variation is it enables the individuals to adapt to environment as well as maintaining the survival of the population.
Based on the information on genetic variation we can conclude whether there is increase or decrease in the genetic variation of the population in the gene pool.
• A zebra migrates to join a different herd of zebras- Increase
• Competition for sunlight leads to taller trees- Decrease
• The DNA of a snake changes to make its venom stronger- Increase
• A grass-fire randomly sweeps through a population of buffalo and kills most of the animals- Decrease
Answer: the correct options are A(oxygen) and E ( Nitrogen).
Explanation: As humans we are able to survive in the planet earth due to its atmospheric composition. The Earth's atmosphere is composed of
Nitrogen(78%) and oxygen (21%). Currently, scientist from NASA has discovered existence of water in Mars. The elements they would look out for on Mars to see if we, as humans, could ultimately survive there is Nitrogen and oxygen.
Answer:
The correct answer is having more surface area
Explanation:
Reaction rate can be defined as the amount of substrate is converted into product per unit time .Reaction rate also called reaction velocity.
The reaction rate can be increased by increasing the surface area so that many reactant molecules can participate in the reaction as a result the reaction rate is being increased.
On the other hand decreasing the amount of reactant,diluting the solution and lowering the temperature decreases the reaction rate.