Well allliving organisms contain genetic information, stored in DNA and RNA molecules,which directs the functions of cells.
The general coding and structureof these molecules is universally shared by all organisms. Questions about theorigin of these molecules are fundamental to our understanding of the origin oflife on Earth.
Experimentslike the one conducted by Miller and Urey demonstrated that organic moleculescould have formed spontaneously in Earth's early atmosphere, and smallermolecules could bond together to build large organic molecules. Somescientists hypothesize that some of the first large organic molecules to formand self-replicate were RNA molecules, with DNA molecules forming much later. This is called the RNA worldhypothesis.
These early RNA molecules were probably smaller than the RNAmolecules in our cells today. They would have contained the codes for buildingspecific protein molecules from the amino acids present on Earth at that time.Proteins are necessary components of all living cells.
It means that all of us- every living creature- was built off the same genetic code.
damage caused by animals and plants
c.
natural acids
b.
ice wedging
d.
physical factors
Answer:
split yo ️Troy ️Troy :
Explanation:
Certainly! Here are five examples of situations or phenomena related to air pressure:
1. Weather Systems: High and low-pressure systems in the atmosphere influence weather patterns. High-pressure areas are associated with clear skies and stable weather, while low-pressure areas often bring cloudy, stormy conditions.
2. Barometer: A barometer is an instrument used to measure atmospheric pressure. It can indicate changes in weather conditions. A rising barometer suggests high pressure and fair weather, while a falling barometer indicates low pressure and the potential for storms.
3. Suction Cups: Suction cups work by creating a vacuum between the cup and a surface, causing lower air pressure inside the cup compared to outside. This pressure difference allows the cup to stick to the surface.
4. Scuba Diving: As divers descend underwater, the pressure increases due to the weight of the water above them. They must equalize the pressure in their ears and masks to avoid discomfort or injury.
5. Airplane Flight: Aircraft cabins are pressurized to maintain a comfortable atmosphere for passengers at high altitudes. The pressure inside the cabin is adjusted to simulate conditions at lower altitudes, where oxygen levels are sufficient for breathing.
The principle stating that the oldest rocks occur on the bottom of an undisturbed rock sequence is known as? The answer is superposition principle.
b. missense
c. insertion
d. frameshift
Ans. (b). missense.
Sickle cell anemia is an inherited blood disorder, due to defect in oxygen-transporting protein, hemoglobin. It is caused by a mutation in a gene that codes for hemoglobin that substitutes GAG codon (that codes for glutamic acid) with codon GUG (that codes for valine).
It is known as a missense mutation, which leads to formation of a non-functional or defected protein (hemoglobin). The defected hemoglobin gets polymerized and forms fibers that give sickle-shape to the red blood cells.
Thus, the correct answer is option (b).
The type of mutation that causes sickle cell anemia is called missense. That is option B
Mutation is defined as the alteration that occurs in the gene of an organism which leads to defective formation in the organism.
Sickel cell anemia occurs when there is missense mutation at a single point in their DNA.
Therefore, the type of mutation that causes sickle cell anemia is called missense.
Learn more about anemia here:
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Compaction and cementation into sedimentary rock, then heat and pressure into metamorphic rock. this is correct answer