A solution of water lacking solutes was added to a beaker of dehydrated red blood cells, explain what occurred as a consequence of this (4 marks).

Ablastocyst is a group of cells that forms after a human egg is fertilized. the blastocyst consists of two types of cells. some of these cells will become the placenta. what do the other cells develop into?

2. sketch the inside of the bean nodule, and describe or label what you observed with the hand lens.

Ascience research group is testing a new type of plant food. one trial is conducted in a controlled experiment. the data from the trial show that the plant that received the new food grew faster than the control plant. the group announces that the new plant food makes plants grow faster. what is the main weakness in this scientific claim?