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I believe the answer would be:
Excess Vitamin A is most harmful to an embryo during the first and second months of pregnancy.
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Genetically modified crops are produced through an organism that undergone changes in its DNA using the process of Genetic Engineering. Genetically foods are being generated and tested inside a laboratory. A natural tastes and feature of a food is being change into something different in tastes and feature.
Helper T cells are found in the <u>Thymus.</u>
Explanation:
Immature T-cells are formed in the bone marrow, just like any other blood cells, through the process of hematopoiesis. These immature T cells are then transported to the thymus where they mature and differentiate into the different types of T cells; cytotoxic, helper and regulatory. T-helper cells, also called CD4⁺ cells, are important in activating B-cells and T-cytotoxic cells in case of infection.
