Answer:
Stabilizing selection
Explanation:
The process of natural selection selects a species in one of the three ways: stabilizing selection, directional selection and disruptive selection.
During the process of stabilizing selection, nature does not favour the extreme phenotypes of the population but the intermediate phenotype with the maximum number of population.
In the given question, the Robin laid four eggs, neither more than four nor less than four which could have more disadvantages than the advantages. Since the intermediate number of eggs is favoured by nature therefore the stabilizing pattern is observed.
Thus, Stabilizing selection is correct.
Answer:
The answer is A - The populations will not be able to interbreed because they are different species and different species cannot interbreed
Explanation:
The population of birds become reproductively isolated because they are different species and different species are unable to interbreed. This is as a result of barriers which are called mechanisms of reproductive isolation which involves mechanisms, behaviors and processes that are critical for speciation. In reproductive isolation the different species are able to live in the same are but their properties and characteristics do not allow them interbreed to produce healthy and sterile offspring.
Based on the given situation above, when there is this strong feeling that you want to choose one over the other, which is, for example choosing which colleges to attend, the part of the brain that is at work is the emotional brain.
The correct answers are:
• that dark matter exists
The existence of dark matter (invisible matter) is generally accepted and it is believed that this matter is about 85% of the total matter in the universe and it is composed of undiscovered subatomic particles.
• that invisible matter must be influencing the rotation of galaxies
Dark matter is crucial for explaining why galaxies can spin without tearing themselves apart.
Answer: Option b) Community
Explanation:
A community refers to the entire group of living organisms in an specific area, living together and relying on one another for nutrients, shelter, protection etc.
Thus, a community usually cover more than one kind of organism. An example of community is the organisms in a swamp, which include plants, animal and microorganisms.
