Calcium provides strength as a element, though it is present as calcium chloride on the exoskeletons.
A skull with a foramen magnum positioned at the back of the skull belongs to an individual that is fully bipedal, such as a human.
<h3>What is a Skull?</h3>
This is referred to a skeletal structure composed of bones which houses and protects the brain.
A foramen magnum is at the base of the spinal cord which is where the opening where the spinal cord passes through which is common in bipedal such as man.
Read more about Bipedal here brainly.com/question/4110325
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Answer:
I am expecting that option c or d is correct
Explanation:
c a mixture is the answer
The external cell membrane. Even organisms as simple as bacteria have a cell membrane.
Prokaryotes do not have internal membranes but they still have external membranes.
Everything living thing has a cell membrane
