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.
Meningocele
Meningocele (MM) is known as meningeal cyst and it is the protrusion
of the membrane that cover the part of spinal cord through the defect in the
vertebral column. Thus, Meningocele (MM) is the least
common fom of spinal bifida and spina bifida is the bony defect in the
vertebral column through the meningeal membrane.
You didn't attached the choice but then I have two answer either of the two is correct. The first one is Putamen , is located on the base of the telencephalon (forebrain). Second answer is Angular gyrus is a region part of the brain and it is involved in number of processing related to number processing and spatial cognition, language, attention and memory retrieval.
In the prophase of mitosis if 18 duplicated chromosomes are in a cell then the number of chromosomes in interphase is <u>9</u>.
A cell's growth and division are accompanied by a sequence of processes known as a cell cycle. A cell spends the majority of its time in what is known as interphase, where it develops, duplicates its chromosomes, and gets ready to divide. The cell then exits interphase, goes through mitosis, and finishes dividing.
A sister chromatid is one that has two identical copies of a chromosome that are connected by a common centromere during chromosome DNA replication. In other words, a sister chromatid can also be thought of as "one-half" of a chromosome that has been duplicated. A dyad is a pair of sister chromatids.
Sister chromatids, which are firmly connected at the centromere region of each chromosome, are created as a result of DNA replication during the S phase (synthesis phase). Each chromosome is a duplicate at this point and is made up of two sister chromatids.
To know more about Sister chromatids visit the link:
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