Answer:
In an experiment, the researcher needs to have a control group with an experimental group where both groups are identical in every way except that the controlled group does not gets the experimental treatment.
Sometimes, it is not possible to do a test or the experiment utilizing a controlled trial (due to ethical reasons or no practical method available). All things considered, a researcher may test a theory by making predictions about outcomes or patterns that ought to be found in nature if the hypothesis is right.
Answer:
D
Explanation:
A) Water that falls from the clouds towards the ground, especially as rain or snow.
B) The continuous movement of water on, above and below the surface of the Earth.
C) When plants or animals create offspring.
D) a recurring process where dead plants decomposes and provides nutrients to the soil that are absorbed by plant roots, making more plants grow.
Hope that helped :)
Answer:
Homeostasis is defined as the state of body in which body maintains several chemical and physical changes inside the body affected by external factors.
Negative feedback loop includes a sensor, stimulus, control center, and effector which is used to control homeostasis.
A negative feedback loop is a reaction that reduce an excessive response and maintain the functions within the normal range. for example: if temperature and blood glucose level increases in the body, negative feedback loops control both the variables and maintain homeostasis.
Hence, negative feedback loops used to control body homeostasis.
Answer:
Either small fish or zookplanton
Explanation:
