PSLE 2022 SC

State why mosquitoes like to lay their eggs on waste.

Mosquito larvae feed on microorganisms in the water that they grow in.

Laying eggs in waste ensures that the larvae that hatch have sufficient ____________and water to survive.

Gases are given out by waste.

Name one group of living things that produces the gases and state the process.

Process:_______________

The smell of gases such as ______________________ attracts mosquitoes to the waste to lay eggs as it signals that a host such as a human being.

Living things need __________________ to survive. Oxygen used up by the mosquitoes is not replaced fast enough. Without oxygen, the mosquitoes trapped cannot go through respiration and hence, die.

____________________________________. The water-carrying tubes transports ________________(and dissolved minerals) from the _______________________up the stem to all parts of the plant.

___________________ of __________________ in the beakers

John should measure the _____________________taken for the water-carrying tubes in each stem to be stained red.

John should measure the _____________________taken for the water-carrying tubes in each stem to be stained red.