Surface mining, which is also known as strip mining, is when soil and rock overlaying mineral deposit is removed. It can cause habitat destruction, air pollution from dust particles, soil erosion and pollution. Subsurface mining is removing deposits from the Earth by drilling underneath layers of rock and dirt. To keep the pathways clear, <span>mining companies have to pump out large amounts of water, which go into surface ecosystems. That disrupts the ecosystem by changing the pH conditions of soil and water sources. Placer mining is mining of stream bed deposits for minerals, a way of obtaining minerals and metal resources. Although, because it is small, causes less damage to the surrounding environment it still can disrupt river ecosystems with pollution and sediments.
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The plant cells contains- cell wall, central vacuole
the animal cell have- cilia cetrosomes
Both plant cells and animal cells contains - cytoplasm and mitochondrion
The main structural differences between plant and animal cells are the additional structures found in pants. The structures include, the cell wall, the chloroplasts and also the vacuoles. The similarity between them is that they both contain plasma membrane, a nucleus, a nucleolus, mitochondria, ribosomes, endoplasmic reticulum, golgi apparatus, peroxisomes and the microtubules.
Answer:
Reflex action is the sudden uncontrolled reaction towards a certain stimuli eg response to hot iron
Reflex arc is the path taken by reflex action to a certain stimuli
Diagram depends to
Receptor(eg skin), receptor nerve(sensory neurone),centre reflex arc(spinal cord most of reflex action) they met relay neurone, motor neurone and ends at reflexor (eg muscle)
Answer:
the vaccine causes the immune system to produce antibodies to the virus that causes the measles
Answer:
The answer is b hope this helps
