1. True. Establishing more sites for the protection of biodiversity across the world can go a long way and would have a chain reaction in the ecosystem. Thus, it will save a lot of our planet's biodiversity. 2. a. -Philiab. -trophicc. eco-d. eu-3. A habitat is where certain species, animals, or organisms naturally live, feed, reproduce, etc. Examples: ocean, rainforest, deserts. An ecosystem has two components: living and non-living organisms which interact with each other to maintain homeostasis. The primary difference between the two is the presence of interaction between the things in the environment.4. Energy5. Producers6. Sun7. (No choices provided) One of the top factors that threaten the survival of species is caused by humans, man-made phenomena. 8. Answer: Polar bears. Polar bears are endangered species and there are only approximately 20,000-30,000 polar bears left in the world. Their population had been decreasing due to habitat loss because of climate change. 9. Scientists based the background extinction rate on the number of known species that went extinct over a period of time in the past. They also based it on archaeological evidence of species that existed and went extinct years ago.
Explanation:
4) option D
5) option A
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I believe the correct answer from the choices listed above is option C. <span>If given an extremely long time, nonliving chemicals will still be nonliving. They will not gain some spirit as the days went by so they will always be nonliving. Hope this answers the question.</span>
Answer:True
Explanation:
Nerve impulse must reach a certain threshold in a neuron before action potential can be generated to intiate conduction of action potential.
Therefore if mutiple impulses are generated and these are not upto thresholds , no matter how strong the stimulI are-NO ACTION POTENTIAL WILL BE GENERATED.
THIS IS ALL OR NONE PRINCIPLE
The all or none hypotheses can be best explain with flushing of the water closet after using it. If required volume of water is not pumped into the water closet storage above, no matter how long the handle is push, FLUSHING WILL NOT TAKE PLACE.Thus the threshold volume of water must be met.
Sun which produces sunlight
