Answer:
Prezygotic barriers:
1. Habitat isolation
2. Behavioral isolation
Explanation:
Pre-zygotic barriers are the barriers which do not allow the formation of the zygote in the organisms.
The two mechanisms of the pre-zygotic barriers are the:
1. Habitat isolation: the Flycatchers do not share the same habitat which is also mentioned in the question that they live on different islands.
2. The behavioural isolation: the Flycatchers could have evolved the different mating rituals as a result of which the could not interbreed.
Thus, Habitat isolation and Behavioral isolation are correct.
Answer:
D. Some cells can support life independently. Other cells support life collectively
Explanation:
Unicellular organisms are able to support their own life without the support of more than 1 cell. While some organisms needs multiple cells to function.
There are four symptoms of addiction namely:
Obsession
Negative consequences
Lack of control
Denial
In this patient, he denies that his behavior is self-destructive; even with the concrete evidence that he is being self-destructive (i.e. plays all day even with work to do). There are two descriptions of denial wherein; (1) he denies that what he does cannot be controlled and (2) he denies that what he does leaves a negative impact in his life. This patient falls to the latter description of denial.
The effect does the chemical referred to as a mutagen has is it causes a permanent change in the genetic material (dna) and is denoted as option D.
<h3>What is DNA?</h3>
This is referred to as deoxyribonucleic acid and is the genetic material in living organisms.
Mutagen on the other hand are agents which cause mutations which means alterations in the DNA of organisms. It affects the transcription and replication of the DNA thereby leading to cell death and other effects such as diseased condition.
This is therefore the reason why option D was chosen as the most appropriate choice.
Read more about Mutagen here brainly.com/question/13837704
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<span>The left and right Parietal bones.
There are eight major bones that form the cranium. They are:
Ethmoid: Forms the lower eye orbits and ceiling of the nasal cavity.
Frontal: Forms the front of the cranium which includes the forehead, brow ridges, and nasal cavity.
Occipital: Forms the lower rear of the cranium.
Parietal (left and right): Form the superior and lateral portion of the cranium.
Sphenoid: Forms some of the eye orbits and the floor of the cranium.
Temporal (left and right): Forms the sides of the cranium and the external ear.</span>
