Answer:
The water cycle is not a nutrient cycle
Explanation:
Because it has no sub chemicals. There is no nutrinites in water no caliores or protein. Water is an inorganic, transparent, tasteless, odorless, and nearly colorless chemical substance. It has no nuances to it. It is bassically just water
Answer:
BRCA1 and BRCA2 genes
Explanation:
The BRCA1 and BRCA2 genes are tumor suppressor genes that encode breast cancer susceptibility proteins involved in repairing double-strand DNA breaks (DSBs) by the mechanism of homologous recombination. This mechanism uses the sister chromatid of the homologous chromosome as template for repairing DSBs. It has been shown that mutations in BRCA1 and BRCA2 genes alter the molecular mechanism of homologous recombination DNA repair, thereby mutations are not repaired appropriately and persist in the DNA of tumor cells.
You are not supposed to begin the observation of specimens with oil immersion lens.
The microscope is an instrument used in science laboratories to study specimen that cannot be seen with the naked eyes.
The specimen for viewing through a microscope are usually prepared as thin slices or sections.
Among the various parts of the microscope are the x10, x40, and x 100 objective lens.
The x100 objective lens is known as the oil immersion lens because oil is added while using the lens to reduce the amount of light refraction thereby allowing more light to pass through the narrow diameter of the high power objective lens.
The x10 objective which is of lower power, should be used to focus the specimen while the higher power objective which is the x100 oil immersion used for closer observation.
Therefore, you are not supposed to begin the observation of specimens with oil immersion lens.
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