Foreshocks may occur days, or even years, before the actual major earthquake itself.
Foreshocks are detected in almost half of all moderate to large earthquakes, and they are detected in over 70% of earthquakes that are above 7.0 in magnitude on the Richter scale. Foreshocks then lead to the main shock, which may be followed by after shocks, depending on the strength of the main shock.
Plant mass related to H20
conclusions partly correct yw :)
The exoskeleton does not keep the body from drying out
So D is not a function of the Exoskeleton
Answer: The correct option is D, because a person having sickle cell anemia must be homozygous for the trait.
Explanation: Sickle cell disease is autosomal inherited disease. In this disease the shape of red blood cell change from round to crescent shape, as a result it become unable to carry oxygen because it can not pass through capillaries. When
Glutamine amino acid is replaced by
Valine the shape of hemoglobin become sickle shaped.
Genetics of Sickle cell anemia:
This disease appears in homozygous recessive from. Genes for sickle cell is represented by
"S" while for normal it is represented by capital
"A". If a carrier man marry a carrier woman then 50% of child will be sickle celled, 25% will be normal and 25% will be carrier for disease as shown in the figure