bacteria

"The bouncy ball was perfectly spherical. "

"The student used a microscope to see the tiny cells in the plant leaf. "

"The scientist examined the sample and found a bacterium, a tiny cell without a nucleus, under the microscope. "

"The police identified the thief using security camera footage. "

"Just like a factory has specialized machines for different tasks, a cell contains organelles that each perform a specific job, such as creating energy or storing waste. "

"My family has a different ideal for my future than I do. "

"The teacher distinguished the students' excellent essays from the others based on their insightful analysis. "

"The specific of her success was her dedication to studying. "

"Her derisive remark about his old shoes embarrassed him in front of everyone. "

"The bright red stripe is distinguishing that brand of running shoe from all the others. "

"The scientist studied the effects of different types of soil on plant growth. "

"In English grammar, "dog" is the singular of "dogs." "