<span>Betty has been moody,tired, and weak there is most likely and abnormality with her thyroid gland and it Thyroid gland in the neck which is endocrine gland consisting of tow lobes with the isthmus.Thyroid gland produces thyroid hormones and it .A thryoid gland are produce from iodine.</span>
Plants and animal cells exhibit cell specialization
This dispersal reduces the likelihood that a sperm will find an egg. Many sperm and eggs die before achieving fertilization. The low success rate of external fertilization puts animals at a reproductive disadvantage compared to internal fertilization.