When you think of a cell, what comes to your mind? Yes, the first thing is one of those microorganisms that you need a microscope to be able to see.

But wait, is there a cell that is so big, it can be seen by other unaided eyes? Of course. We are talking about the egg yolk.

The yolk of eggs is actually a single cell, and technically, only when they are just laid, or unfertilized. Therefore, the egg yolk has the reputation of being the largest cell on earth!

Other single celled organisms are protozoans, which are the size of grapes and have been found crawling along the ocean floor. Larger still when in groups is the caulerpa, a plant-like single-celled algae that grows leaf-like fronds, and can develop up to a length of up to three meters in length. The odds are good that you have seen a caulerpa sometime during your life, as they are a common species of seaweed that is very popular in domestic aquariums.

 

Can't wait to get all 20 science misconceptions at one go to revise with your child before her exams? Well, you can get them all neatly consolidated in one PDF Booklet.

The "20 Primary School Science Misconceptions" PDF Booklet contains 29 pages of information to dispel common Science myths that cause many children to make mistakes in their exams.

The other title in the series that you have to get is the "Top 12 Tips for Primary School Science" PDF Booklet. It reveals 12 of the most tried-and-tested Primary School Science tips in 32 colourful pages.

Both titles are available at only $4.99 each.

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