Cows with a displaced abomasum do not eat well
Indicate whether the statement is true or false
True
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Magnesium atoms have two electrons in the outermost shell and chlorine atoms have seven. The compound magnesium chloride would contain
A) 1 magnesium and 1 chlorine. B) 1 magnesium and 2 chlorine. C) 2 magnesium and 1 chlorine. D) 2 magnesium and 7 chlorine. E) impossible to tell without more information
Which of the following statements is true about positive and negative lymphocyte selection?
A) Only positive selection is needed for proper functioning of the immune system. B) It is necessary to have lymphocytes that can fight foreign objects in the body without harming its own tissues. C) In both instances, lymphocytes die after they do their job. D) In both instances, antigens do not recognize pathogens in the body.
Tri-iodothyronine and tetraiodothyronine are produced by the C-cells of the thyroid gland
Indicate whether the statement is true or false
____ cells produce secretions that supply nutrients for the developing sperm cells
a. Spermatozoa b. Sertoli c. Seminiferous d. Leydig