First organisms on Earth were fully aquatic. About 460 mya a lineage of algae moved onto land and gradually adapted to air and soil. Name two evolutionary problems that first land plants faced when transitioning from water to land?

Examples of physiological problems and the adaptations of plants: 
1) Body support. As organisms in water face lower pressure than in air, algae did not need to have composite body parts. When moved onto land, plants developed roots to be secured in soil and stems to support their body weight. 
2) Exposure to direct sunlight and higher O2 . Plants have to become more resistant to new external conditions and adapted their photosynthetic processes to harness more light and CO2. 

Other adaptations: 
- different medium for reproduction. Spores were now dispersed in air and not water. 
- eggs were not dispersed at all and plants developed special organs to protect eggs.
- sperms were dispersed through ground water
-  later in evolutionary years plants developed flowers to be pollinated
and so on. 

Ivana L. A Level Biology tutor, A Level Chemistry tutor, GCSE Science...

7 months ago

Answered by Ivana, a GCSE Science tutor with MyTutor

Still stuck? Get one-to-one help from a personally interviewed subject specialist


£18 /hr

Victoria E.

Degree: Economics (Bachelors) - Bristol University

Subjects offered: Science, Maths+ 4 more

Human Biology
-Personal Statements-

“Hi,I'm an enthusiastic student studing Economics at the University of Bristol. For my A Levels I studied Maths, Biology and Chemistry and would love to help younger students at GCSE level in these subjects.During sixth form I tutor...”

£24 /hr

Francesco G.

Degree: BSc Biomedical Science (Bachelors) - Kings, London University

Subjects offered: Science, Philosophy and Ethics+ 9 more

Philosophy and Ethics
Human Biology
.BMAT (BioMedical Admissions)
-Personal Statements-
-Medical School Preparation-

“Hello! My name is Francesco Grillo, I am a first-year Biomedical Science student in London, at King's College London. I am passionate about science, philosophy and languages.I was born in Rome (Italy). My first experience abroad was ...”

£18 /hr

Thea H.

Degree: Health and Human Sciences (anthropology) (Bachelors) - Durham University

Subjects offered: Science, Maths+ 1 more


“About Me! I am an Anthropology student at Durham University where I also study french and portuguese. I have always had a passion for languages and would love to help someone else  achieve their goals (whether or not you share my pass...”

MyTutor guarantee

About the author

Ivana L.

Currently unavailable: for regular students

Degree: Chemistry (Masters) - Edinburgh University

Subjects offered: Science, Chemistry+ 1 more


“Hi. I am Ivana, a Masters student in Materials Chemistry at the University of Edinburgh.  My goal is to teach in a way which would effectively help you to gain  in-depth understanding of the material and to be able to use the gained ...”

MyTutor guarantee

You may also like...

Other GCSE Science questions

What is osmosis and how does it work?

What is crude oil and how is petrol derived from it?

Describe how a protein is digested

How does atomic size differ with groups in the periodic table?

View GCSE Science tutors


We use cookies to improve our service. By continuing to use this website, we'll assume that you're OK with this. Dismiss