x or y because both can cause it
There's more to remember in college. This is the case for all subjects
Answer:
Lead in
g of blood
grams
Explanation:
Given -
Amount of lead in human blood -
parts per million (ppm)
This is equivalent to
g of lead for each million grams of blood
Numerically, it can be represented as -

Lead in
g of blood
grams
Lead in
g of blood
grams
Answer: The correct answer is option (B).
Explanation:
Birth rate in Hungary in 2014 = 12 (per 1000 people)
Death rate in Hungary in 2014= 8 (per 1000 people)
Growth rate = Birth rate - Death rate :
12(per 1000 people) - 4 (per 1000 people)= +4(per 1000 people)
Positive sign indicates that there will be a increase in growth rate by the magnitude of 4 per 1000 people in 2014.
Hence, the correct answer is option (B).
A plant can respond to flooding if it would form air tubes to provide oxygen to the roots through negative feedback. It is a type of stress response.
<h3>Negative feedback regulation</h3>
Negative feedback is a process that happens when a given outcome of a system is fed back in a way that tends to reduce its fluctuations.
This type of mechanism (negative feedback regulation) is very common in nature.
Plants use negative feedback regulation to respond to different environmental inputs.
Learn more about negative feedback regulation here:
brainly.com/question/1446890