Mrs. Lim wanted to create a new plant which has flowers with white and yellow petals. She used two parent plants of the same kind. The flowers of these plants have both male and female reproductive parts.

In order to create the new plant, Mrs. Lim can _________.
A. remove all the ovaries and all the anthers of flowers W B. remove all the ovaries of flowers W and all the stigmas of flowers Y C. transfer the pollen grains from the anther of flower W to the stigma of flower Y D. transfer the pollen grains from the anther of flower Y to the stigma of flower W

Alice wanted to choose a suitable material to make a classroom projector screen. The properties of materials W, X, Y, and Z are shown in the table.

Which of the following two activities contribute to an increase in the amount of carbon dioxide in the air?
 A Using a bicycle to get around
 B Clearing Forest area to build factories
 C Using reusable bags when going shopping
 D Burning trash instead of dumping them into landfills

The diagram shows the cross-section of pond with some plants

Allegra wanted to find out if the presence of water affects the growth of mould on bread.

The diagram show the male and female human reproductive systems.

The diagram shows the life cycle of a flowering plant.

The water cycle on Earth can take place continuously because water_________.

A) Melts at 0°C and boils at 100°C
B) Can change from one state to another
C) Has volume and cannot be compressed
D) Is important for the survival of living things

Two identical pieces of paper, one crumpled into a ball, are released from the same height at the same time as shown.