Humans impact the physical environment in many ways: overpopulation, pollution, burning fossil fuels, and deforestation.
Changes like these have triggered climate change, soil erosion, poor air quality, and undrinkable water.
These negative impacts can affect human behavior and can prompt mass migrations or battles over clean water.
Answer:
Botulinum is a toxin that can be used to cure wrinkles in human beings by injecting it in very small concentrations and it works in preventing the signals from the nerve cells to muscles and thus paralyzing them by stopping wrinkle formation.
Wrinkles are caused by the contraction of muscles and this neurotransmitter does not allows the muscles to contract. In order to contract nerves release a chemical messenger called as acetycholine. This neurotransmitter is found at the junction where the nerve cell reaches the muscle cell. This causes contraction of muscles.
Injecting botulinum prevents the release of acetylcholine which prevents the contraction of muscle, causing reduction in wrinkles and muscles become stiff.
Answer:
Reptiles
Explanation:
I asked and it had a similar questionnaire and the only answer that it has in common was reptiles so that's what I would go for.
Answer:
A scientist would ask a different question when he or she founds that the observed results are different from the expected results.
Explanation:
<h3>When one expects something and gets something else, then one is having a big enough cause to ask for new questions and initiate a new investigation. Scientific investigation is the process by which the researchers and scientists use a planned approach to answer questions regarding the world around us.</h3>