Answer:
440 - 410 million years ago
Explanation:
Whatever their origins, animals may have ventured onto land early in the Cambrian. Previously scientists believed that animals did not begin to colonise the land until the Silurian (440 - 410 million years ago).
Answer:
The correct answer is option A. an immediate immune reaction to the initial infection with dengue virus.
Explanation:
The dengue is the virus infected disease that is caused by dengue virus and transmitted by the aedes mosquito. The dengue fever and dengue hemorrhagic fever are two type of dengue. DHF or dengue hemorrhagic fever includes second stage of the fever with plasma leakage from endothelium of blood vessels.
Thus, the correct answer is option A. an immediate immune reaction to the initial infection with dengue virus.
By injecting Mesenchymal Stem Cells with ability to express high amount of Akt or protein kinase B in myocardium, researchers witnessed restored cardiac function and inhibition of ventricular remodeling. The effect was seen after two weeks of administration of cells. The culture containing hypoxic Akt-MSCs (conditioned medium) inhibits apoptosis or cell death induced due to hypoxia. Also, it triggers in vitro contraction of cardiomyocytes, the cardiac cells specifically responsible for contraction function.
The desired functional improvement can occur in short time which is less than 72 hours, the reason for which was hypothesized as paracrine action of cells. Hypothesis was proved by upregulation of genes that code for factors responsible for above mentioned effects (apoptosis and contraction). The factors are FGF-2, VEGF, HGF etc.
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Answer:
west to east
Explanation:
Low pressure spins counterclockwise, causing weather systems to move from west to east in the Northern Hemisphere.
