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Haneea Yasir
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Saudi Arabia
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Saudi Arabia

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Petronilla
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Harsh Aryan
India
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India

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Saoud Eshaq
Qatar
Saoud Eshaq
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Louisa Wibisono
Indonesia
Louisa Wibisono
Indonesia

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Nihar Narsana
India
Nihar Narsana
India

It was very organized and easy to understand

Karen Younes
Kuwait
Karen Younes
Kuwait

I just aced the paper 2 English exam
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Vishal Varadraj
UK
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UK

My boys love your programmes very much

Teresa Kum
Hong Kong
Teresa Kum
Hong Kong

I got 5A*! This site helped me after everyone lost hope in me!

Kanishka Bhindora
India
Kanishka Bhindora
India

I got 5A*s and 1A

Somya Damania
India
Somya Damania
India

Amazing course
I am now really confident in writing my IGCSE ESL Exam thanks to you.

Ahmed Ibrahim
Kuwait
Ahmed Ibrahim
Kuwait

The videos are very useful

Sivam
UK
Sivam
UK

I got grade A* in my English mocks

Nawal Amir
Saudi Arabia
Nawal Amir
Saudi Arabia

Extremely well organised, intensive, focused and importantly, time management
While the program was intensive and focused on the finer aspects of language skills, I firmly believe that it has also taught him some very important life skills - the first and foremost being time management.
Advance planning and a workable schedule for the duration of the course made the target achievable in a very comfortable manner. At no point of time did he feel as if he was rushed, this is in addition to being in the school basketball team , keyboard player in the band and other extracurricular activities. I will not hesitate to recommend these revision classes to my friends. Continue the good work, IGCSE Team.

Chandrika Kannan
USA
Chandrika Kannan
USA

I received 6A*s and 3As

Deidre R. Sagonda
Zimbabwe
Deidre R. Sagonda
Zimbabwe

My marks are improving at school

Aaran
UK
Aaran
UK

Every resource you provided was really helpful and understandable

NJR
NJR

I got 3As and 1B
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Alhussien Rehan
Egypt
Alhussien Rehan
Egypt

We had good experiences with our first son
and want to book as well for our second son.

Juergen Rode
Germany
Juergen Rode
Germany

I got 9 A*s and 1 A!

Yee Kwan
Hong Kong
Yee Kwan
Hong Kong

Q&A Session
Leave your questions at the comment section below. Our subject matter experts will answer them.
* Please visit this page regularly for your answers.
Dear IGCSE team,
I faced a problem in this question (0610/m/j/42/19 question 2 part b)…regarding limiting factors
I could compare but what should I write for explaining ,in the answer?
Thanks
Nawal.
Hi Nawalamir,
Are you referring to the 0610_s19_qp_42 paper? Upon checking your question we noticed it does not relate to limiting factors but rather about an experiment on carbon dioxide concentration. To help you with your problem, could you kindly help us to clearly understand which question paper you need assistance with?
Thank you for using IGCSE Centre to sharpen your skills and we look forward to your response.
Best Regards,
Biology Department
I’m sorry for the inconvenience caused. I will explain to you right away. Yes, the question paper I’m referring is 0610/42/m/j/19 question 2 (part b). My confusion is regarding the explaining part of the question in which the mark scheme has referred to light, temperature and carbon dioxide as the limiting factor when the rate of reaction decreases,from the graph. Can u explain it? Also I have another question: Can you compare the development of fetus in early stages of pregnancy to its development in late stages of pregnancy?
Thanks
Nawalamir
Hi Nawalamir,
Thank you for getting back to us. It’s clearer now.
To answer your first questions we first need to understand that a limiting factor in biology is that variable/environmental condition that limits the growth, abundance, and development of a population/size. Therefore, increasing or decreasing the limiting factor has a direct positive/negative impact on the population/size.
In this case, the limiting factors are those that affect the rate of photosynthesis in the experiment; Light, temperature, and carbon dioxide. Increasing or decreasing any of these environmental conditions has a direct influence on the rate of photosynthesis.
On to the second question on a fetus during early vs late pregnancy.
The early stages of the development of a fetus are called the embryonic stage. This is because the pluripotent cells of the embryo begin to differentiate into vital organs such as the limbs, heart (and the cardiovascular system), and the central nervous system (brain and spinal cord). Eventually, the embryo grows into a human-like form in the womb, though just about 2 inches long. If this stage is negatively affected the unborn child is highly susceptible to having a congenital disease after birth.
The later stage is the fetal stage of development which is mainly focused on the growth and development of the fetus as cells continue to differentiate. The fetus grows in size, takes an even more vivid human-like form (enough to tell gender), and weighs about 2 pounds in the second trimester. The baby will move in the womb and prepare for birth.
Hope this helps, we are here for you.
Best regards,
Biology Department