Nucleic acids, and RNA is also a polymer. The monomers of nucleic acids are nucleotides.
The issues related to species could be resolved with the help of biologists.
- Chemists, geographers, and biologists are the three categories of scientific workers.
- Chemists are people who study chemistry and do research on chemical compounds. Since they are primarily concerned with chemical reactions, they are unable to address the issue of species.
- Since geographers are primarily physical scientists who also study geography and the distribution of land, features, and people on earth, they are unable to address the issue of species.
- A biologist is someone who studies biology, which is primarily based on humans. They research all types of living things and life in general in order to be able to address issues with species.
- Laboratory studies with animals, plants, microbes, or biomolecules are frequently carried out by biologists. A tiny portion of biological research does, however, take place outside of the lab and may entail natural observation as opposed to experimental.
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The answer is B. Geology has shown a thin layer of iridium (a rare mineral on earth but found on asteroids and meteors) in the rock layers between the Cretaceous and Paleogene periods. Below this layer are numerous fossils of pterosaurs and dinosaurs, but above the layer are drastically few. The aftermath of asteroid impact is believed to have smothered most vegetation from earth which dinosaurs depended on as a source of food.
Answer:
C A single genotype produces a range of phenotypes that differ in the degree or magnitude of expression of the particular trait specified by the gene.
Explanation:
Variable expressivity refers to the range of signs and symptoms that can occur in different people with the same genetic condition.
For example, the features of Marfan syndrome vary widely— some people have only mild symptoms (such as being tall and thin with long, slender fingers), while others also experience life-threatening complications involving the heart and blood vessels. Although the features are highly variable, most people with this disorder have a mutation in the same gene (FBN1).
The color produced by one milligram of platinum cobalt in one liter of dissolved water is fixed as one unit of color in platinum-cobalt scale.
