Answer:
4
Explanation:
Changes in the health of an economy
ANSWER: C, the continents were at one time joined together.
REASONING: Alfred Wegener was the first person to propose the scientific theory of Continental Drift. Continental Drift is a theory that supposes all the continents were at one time joined together as one large land mass. The mechanisms of continental drift can be explained by Plate Tectonics.
Answer:
1. B
2. C
Explanation:
1. Stem cells have a higher potency than differentiated cells. They are pluripotent and multipotent cells that can differentiate into most types of cells. Therefore they can be used to repair injuries that take long to heal naturally. An example is applying stem cells on joints of people with arthritis to enable cartilage of knee caps regenerate.
2. Bionics is a form of engineering that mimics human physiology but is not made of tissues but rather mechanicals made of a material like titanium. An amputee, for example, will have a mechanical arm or leg on the amputated limb that functions like a real limb. Usually, in the best form of bionics, the subject is able to control the artificial limb with their mind.
Answer:
i). Dominant Allele.
ii). Recessive Allele
Explanation:
A dominant allele completely dictates the appearance or phenotype of heterozygotes. One allele is said to be dominant over another if a heterozygous individual bearing the allele has the same appearance as an individual who is homozygous for it.
A recessive allele is one who phenotypic expression is completely masked in heterozygotes by the presence of a dominant allele.
