In alimentary canal, food get digested by the action of many enzymes secreted by various glands including Liver, Pancreas and salivary glands....
The immune system, and the excretory system
(Honestly, all of them work to keep us 'healthy', but I believe these are the ones you're looking for)
The hormone calcitonin is controlled by a negative feedback mechanism because it's release leads to the decrease of calcium blood levels.
<h3>What is negative feedback mechanism?</h3>
A negative feedback mechanism is the defined as a type of regulatory mechanism in the body where by the increased output of a system leads to a decrease of another system.
Therefore, the release of the hormone calcitonin (increased level of calcitonin in the blood) will lead to decrease in blood levels of calcium.
Learn more about hormones here:
brainly.com/question/8162998
#SPJ1
Answer:
The correct answers are -
A. Find the absolute age of rocks at both locations.
B. Compare a layer at one location to layers at other locations
C. Identify index fossils in one or more layer at one location.
Explanation:
A scientist who studied the earth and different aspects such as it's structure and the materials it made if up known as a geologist. Classifying rocks and discovering various components and matter on earth are the major duties of a geologist.
At some point, rocks can be located at a distance beyond the reach of geologists. Nevertheless, they have a way of studying, and comparing the layers of those rocks helps them to understand the basic difference in the earth locations and the presence of certain components of earth.
Comparing rocks and layers can include these steps at first by geologists-
A. Find the absolute age of rocks at both locations.
B. Compare a layer at one location to layers at other locations
C. Identify index fossils in one or more layer at one location.
255 would be about how many aliens would become thin
