Systems

Ali covered the leaves of a plant with black paper. After a week, the plant started to turn yellow. Which function was prevented by the black paper?

Mr Tan grew two identical young plants (like the one in the photo) of the SAME species in separate pots, kept in the same sunny garden. Plant X had its STEM bent and crushed near the soil (but not broken off), while Plant Y had HALF of its ROOTS gently snipped off. Both pots were watered the same way each day. Which of the following predictions is MOST scientifically reasonable?

Luke painted ALL the leaves of a healthy potted plant with thick white paint, covering both the upper and lower surfaces completely. The white paint blocks all light but allows air to pass through tiny gaps. He then placed the plant in full sunlight and watered it daily for two weeks. Which outcome is MOST likely after two weeks?

A bean seed is planted in moist, dark soil. After a few days, a tiny seedling sprouts and begins to grow upward. At this early stage, the seedling has no green leaves yet and cannot make its own food. Which part of the seed provides the energy and nutrients the young seedling needs to grow at this stage?

Lucas observed a mango tree in his garden. He noticed that flowers appeared first, then after bees visited the flowers, the petals fell off and small green fruits began to grow in their place. Which statement BEST explains the sequence of events Lucas observed?