MYTUTOR SUBJECT ANSWERS

462 views

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...

10 months ago

Answered by Ivana, a GCSE Science tutor with MyTutor


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

76 SUBJECT SPECIALISTS

£24 /hr

Sohini C.

Degree: Medicine,MBBCh (Bachelors) - Cardiff University

Subjects offered:Science, Maths+ 3 more

Science
Maths
Biology
-Personal Statements-
-Medical School Preparation-

“Hi, I'm Sohini. I'm a fourth year medical student at Cardiff uni and keen to help students with Science and Maths GCSE subjects. I can also help with medical school applications, especially personal statements and interviews. ”

PremiumOliver B. GCSE Chemistry tutor, GCSE Biology tutor, GCSE Geology tuto...
£36 /hr

Oliver B.

Degree: Medicine (PhD) (Doctorate) - Bristol University

Subjects offered:Science, Physics+ 5 more

Science
Physics
Geology
Extended Project Qualification
Chemistry
Biology
-Personal Statements-

“I have been teaching here for over 2 years and am willing to go the extra mile for any regular pupil of mine. I use varying teaching styles depending on what helps you to learn best!”

£22 /hr

Joe C.

Degree: General Engineering (Masters) - Durham University

Subjects offered:Science, Physics+ 2 more

Science
Physics
Maths
Computing

“Masters student at Durham University, ready to help you excel at Maths and Science ”

About the author

Ivana L.

Currently unavailable: for regular students

Degree: Chemistry (Masters) - Edinburgh University

Subjects offered:Science, Chemistry+ 1 more

Science
Chemistry
Biology

“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 are hydrocarbons and why are they so important?

What's the difference between speed and velocity?

What is the main difference between Mitosis and Meiosis

View GCSE Science tutors

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

mtw:mercury1:status:ok