If sperm contains both x and y chromosomes then who decides the gender. Whether egg chooses which sperm( a sperm carrying x or y chromosomes) has to be fertilized.

Calvin ate a candy bar, which caused his body's blood glucose levels to become unbalanced. his body responded by initiating a feedback mechanism to return his body to homeostasis. place the steps of this feedback mechanism in order, starting with the blood glucose imbalance that occurred after calvin consumed the candy bar. a) calvin's blood glucose levels decreased. b) calvin's pancreas stopped secreting insulin. c) calvin's body cells started to take up glucose and store it as glycogen. d) calvin's blood glucose levels increased. e) calvin's pancreas started secreting insulin.

Where does the esophagus lead to in a frog?

Based on the data in the graphs do you think pepsin and trypsin are found in the same part of the body? explain your answer.