A mass extinction is when a certain group of animals or species suddenly die in large quantities with little to no hope of having a large birthrate to rebalance the losses.
This would have large effects on other parts of the food chain, and would lead to many species overpopulating and then drastically dying off
Hope this help
Guard cell did it on account of turgidity. it can be simply understand as water helps in opening and closing with the help of sunlight !
if you want to know more about it just comment !
plant growth
animal actions
pressure release
Explanation:
The causes of mechanical weathering of rocks include plant growth, animal actions and pressure release. Acid rain and carbon dioxide leads to chemical weathering of rocks.
Weathering is the physical disintegration and chemical decomposition of rocks to form sediments and soil.
- Mechanical weathering is also known as physical rock weathering.
- In this type of weathering huge masses of rocks are broken down into tiny pieces.
- When plant grows on rocks, their roots penetrates through cracks in the rock and can disintegrate it.
- Some animals burrow and bore deep into rocks.
- When a rock mass is lifted from the top of another, pressure release leads to the formation of exfoliation in which a rock resembles an onion peel.
learn more:
Contact metamorphism brainly.com/question/1970623
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I think it is the second one I'm in bio right now and we just finished the energetics unit.