Transfer ribonucleic acid is a type of RNA molecule that helps decode a messenger RNA sequence into a protein. RNAs function at specific sites in the ribosome during translation, which is a process that synthesizes a protein from an RNA molecule.
Tropical and subtropical areas
Thank you for posting your question here at brainly. Below are the choices. The answer is 4.
1)Cell signaling is observed in single-celled organisms that reproduce asexually through binary fission.
<span>2)The mechanisms of cell signaling are similar in organisms whose last common ancestor lived a billion years ago. </span>
<span>3)The pathways in primitive organisms, such as bacteria, are shorter than in those in advanced organisms, such as humans. </span>
<span>4)Simple forms of life that have not evolved much since the origin of life, such as prokaryotes, use cell signaling.</span>
The question is incomplete as it does not have the options which are:
A. Soils saturated with water
B. Drier soils
C. Soils with lower mean temperatures
D. Soils with lower nitrogen
E. Soils with lower pH
Answer:
D. Soils with lower nitrogen
Explanation:
A cycad is a group of plants which belong to the gymnosperms or the plants which bear naked seeds.
The cycads show a characteristic feature that they form a symbiotic relationship with the nitrogen-fixing bacteria like the cyanobacteria and the <em>Anabaena cicadae</em>. These nitrogen-fixing bacteria live in the roots of the plants and convert the atmospheric nitrogen to the ammonia which can be used by the plants and the roots are called the coralloid roots.
If a mutation occurs in the gene of cycad which produces coralloid roots then the mutation will affect the survival of the plant as plants will not have enough nitrogen to be utilized and the soil with lower nitrogen content will also affect the survival of these mutated cycads.
Thus, Option-D is correct.
