Answer:
A. are caused by genes for defective proteins
Explanation:
Sickle cell anemia occurs when the gene coding for the beta chain of the hemoglobin has a substitution mutation. The mutant gene code for a faulty protein. The mutated hemoglobin forms aggregates and imparts sickle shape to the red blood cells carrying them. Similarly, hemophilia is caused due to mutation in the gene coding for Factor VIII. This protein is involved in blood clotting. The affected person has a deficiency of Factor VIII and experience severe blood loss even in case of a small injury.
Tundra soils are formed at high latitudes. It is usually very cold in the tundra. Tundra soils are generally frozen, and are classifed as Gelisols (think Gelato!).
In order to be a Gelisol, permafrost needs to be within 100 cm of the soil surface. These soils freeze and thaw a lot, making the soil heave and buckle (cryoturbation), like a mixter does to cookie dough. This creates trees at funny angles , and can generate a lot of building issues.
The soil quality of a taiga biome is very poor. This poor quality is due to the fact that the taiga has such low temperatures
for such a long period of time. Fallen leaves and moss can remain on the floor for a long time without decomposing due to the cold, moist climate. This limits their organic contribution to the soil, creating spodosol. This in turn limits the ground coverage of the forest floor.
Answer: Hypertonic solution
Explanation: In hypertonic solutions solute concentration is higher that those inside the cells. That means there is a different pressure in and out of the cell and in order to reach the equilibrium the cell has to release water to the medium and ever the concentration. As a result of this stressful conditions cells shrink which make pickles smaller.
Answer:
(C) The students
Explanation:
According to my research on the terminology used when conducting experiments, I can say that based on the information provided within the question the Who in this situation are the students. This is because the students are the one's conducting the experiment (Who).
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This process of dna copying would be mitosis.