My Report

Biology – Class 12 Practice Test 10


Correct Answer: 2 points | Wrong: -1 point
Grades: A* (100% score) | A (80%-99%) | B (60%-80%) | C (40%-60%) | D (0%-40%)
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1. Which of the following is the effect of high BOD?

2. What should be the amount of BOD in the drinking water?

3. Of all the species recorded, what percent do plants comprise of?

4. Who replaces the phytoplanktons in a hydrarch succession?

5. Which of the following is an odd one?

6. What is the sequence of successional stages occurring in water called?

7. How many species of fishes are present on Earth?

8. According to the IUCN Red List (2004) documents, how many vertebrate species have extinct in the last 500 years?

9. What of the following was adopted as the substitute for open-burning dumping grounds?

10. How many years did evolution required?


 

Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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