______________ of earth surface is covered with water?
Correct answer: C. 75%
- A. 10%
- B. 30%
- C. 75%
- D. 90%
Explanation
Approximately 71% of Earth's surface is covered by water, and this is conventionally rounded to about 75% in many biology texts. The 90% option greatly overestimates the coverage and may be chosen by confusing Earth's water-rich appearance with its actual surface proportion.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Biological Importance of Water
Water supports life through its polarity, hydrogen bonding and ability to dissolve ionic and polar substances. Its high specific heat, heat of vaporization, cohesion, adhesion and incompressibility help regulate temperature, transport materials and maintain structure, while hydrolysis and osmosis depend directly on water.
Practise Biological Molecules
1,790 free Biological Molecules MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Biology questions like this
Biology is on 8 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Biological Importance of Water questions
According to cohesion-tension theory, tension is created by__________________?
Which of the following is most constant abiotic component of ecosystem___________?
Ecosystem not found in Pakistan is_____________?
Oxygen accounts for __________ percent of totals human body mass?
Percentage of water in brain cells is_______?
All of the following are elements that plants need in very small amounts except___________?