The diagram compares the characteristics of male and female gametes. Which item can be placed in the section labeled “Z”? have 23 chromosomes
are not motile
determine offspring’s sex
are produced throughout life

Andrew feels good about himself. he doesn't know exactly why he is so happy, but every day he looks forward to his schoolwork and chores. "i play a game," he says. "i make a list of everything i have to get done, and then i try to finish it all before a certain time. for some reason, i feel great when i beat my time." based on this information, why is andrew happy? he gets a proper amount of sleep he eats healthy meals he has a strong family support group he regularly meets his own goals