Answer:
d. inclusion of I1 in the mRNA
Explanation:
Introns are any nucleotide sequence within the gene that is non-coding and it is usually removed by RNA splicing.
When an RNA transcript is made, it is considered as pre-mRNA. The pre-RNA contains both the introns and the exons. For it to mature into mRNA, the introns should be spliced and the exons are joined together to form the mRNA.
A mutation might result to the intron I1 not getting spliced hence it will be included in the mRNA.
Answer:
D. The concentration of salt becomes so high that all plant life is destroyed.
Explanation:
As time passes, the structure of an ecological community gradually changes leading to formation of new species. This is known as <u>ecological succession</u>.
The various processes above show an example of how ecological succession occurs over time. <u>However, it doesn't indicate at any point that plant life is destroyed due to high concentration of salt.</u>
The salt marsh that results actually supports plant life in the form of mangrove trees.
Research on brain development suggests that risky behavior in teens may be the result of incomplete development and changes that occur in the prefrontal cortex of the brain.
The prefrontal cortex is located in the frontal lobe, behind the frontal cortex. The function of this region is for executive function, an ability to differentiate good things from bad things and consequence of an activity. Incomplete development will impair those abilities, makes the teens do risky behavior.
1) "Lustrous appearance with solid form"
2) "Intermediate Electrical conductivity"
3) "Intermediate Ionization energy and Electronegativity"
4) "Non-metallic in chemical behavior but can form alloys"
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