Please solve this question it's urgent only marked ones

Dear student, 10. 23 number of chromosomes are present in human gametes. 11. XX and XY are sex chromosomes. 12. An ovum has XX chromosome while a sperm has XY sex chromosome. 13. Aldosterone is the hormone that is used to maintain salt balance in our body. 14. Deficiency of iodine mineral leads to goitre. Thanks and regards.

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