Why can only sperm fertilize an egg?

What organ is the first to receive nutrients that have been absorbed from the digestive tract?

Jason, a dog breeder, decides to mate a poodle with a golden labrador retriever. he wants to get puppies with the curly hair of the poodle and the color of the labrador. what concept is shown in this example? question 6 options: artificial selection adaptation evolution natural selection

3differences between bacteria and other 2 cells