Fill in the blanks.
_____________ is used in summarines to see objects above the surface of water
Answers
Answer:
Q1. Which of the following groups contain only biodegradable items?
a. Grass, flowers and leather
b. Grass, wood and plastic
c. Fruit peels, cake and lime juice
d. Cake, wood and grass
Solution:
a) Grass, flowers and leather
c) Fruit peels, cake and lime juice
d) Cake, wood and grass
Above all are the groups that contain only biodegradable items. Since plastic is not a biodegradable substance, that group cannot be considered as a biodegradable.
Q2. Which of the following constitute a food-chain?
a. Grass, wheat and mango
b. Grass, goat and human
c. Goat, cow and elephant
d. Grass, fish and goat
Solution:
b. Grass, goat and human
Here, the goat is the producer, goat is the primary consumer and human is the secondary consumer.
Q3. Which of the following are environment-friendly particles?
a. Carrying cloth bags to put purchases in while shopping
b. Switching off unnecessary lights and fans
c. Walking to school instead of getting your mother to drop you on her scooter
d. All of the above
Solution: d) All of the above
Q4. What will happen if we kill all the organisms in one trophic level?
Solution:
If we kill all the organisms in one trophic level, the food supply to the next level will strop resulting in imbalance of the ecosystem. As a result animals in the higher levels will die making the growth of animals in the lower trophic level increase in an enormous way. All of this will affect the overall balance in the ecosystem.
Q5. Will the impact of removing all the organisms in the trophic level be different for different trophic levels? Can the organisms of any trophic level be removed without causing any damage to the ecosystem?
Solution:
Yes, the impact of removing all the organisms in a trophic level will be different for different trophic levels. For example, if all the producers are removed, there is a chance of death or migration of the primary consumers which will upset the trophic levels. This is same for all the levels. Therefore, the removal of organisms at any level would upset the whole ecosystem as the food chain is disturbed. The survival of the higher level animals is completely dependent on the animals at the lower levels.
Q6. What is biological magnification? Will the levels if you have any questions or need any further information please contact me at the end of the end of the end of the end of the end of the end of the end of the end of the end up with the end of the end of the end of the end of the end of the end of the end of the end of the end of the end of the end of the end of the end of the end of the year again and smart ways smart ways of learning is of the end of the end of the end of the end of the end up in the end I know I know you are not the of the end of the year again and smart ways smart ways of learning is of the end of the end of the end of the end of the end up in the end I know I know you are not the of the end of the year again and smart ways smart ways of learning is of the end of the end of the end of the end of the end up in the end I know I know you are not the of the end of the year again and smart ways smart ways of learning is of the end of the end of the end of the end of the end up in the end I know I know you are not the of the end of the year again and smart ways smart ways of learning is of the end of the end of the end of the end of the end up in the end I know I know you are not the end of the end of the year again and smart ways smart ways of learning is ask for a good
A special device in the submarine which allows people to see objects above the water surfaces is known as periscope. The word periscope comes from the Greek words Peri which means “around" and Scopus, which means “look." This optical instrument uses prisms, mirrors or lenses to reflect images through a tube.