A membrane that only "lets" certain molecules in while keeping other molecules out is ___ ___. Flexible bi-lipid layers selectively permeable

Which organelle turns energy from the sun into energy the cell can use to make food? cell wall?

Which of the following is NOT one of the uses of fungi? Select one:a. As a source of antibiotics. b. To make drinks, like beer. c. To produce fabrics like cotton and linen. d. To make food, like bread. e.

Why do hurricanes form only in the tropics? A. There is only enough atmospheric moisture in the tropics to form hurricanes. B. The Coriolis force is only strong enough in the tropics to form hurricanes. C.

What happens when an enzyme's structure as it exceeds the typical human body temperature

Is the tomato a fruit or a vegetable? Explain.

How are all living thing made of cells

Which is am example of an internal stimulus? A) an increase in the amount of water available to a plant B) an artificial light attracts insects C) a decrease in oxygen levels in the blood during exercise D) a sudden change of air temperature

How dose one determine when an ecosystem is in balance

How does respiratory system relate to respiration making ATP?

What is the largest group of reptiles that ever lived?