Science keeps "improving", so the scientific theories and ideas from the past are either expanded on or proved to be false. The concept of planets has definitely seen changes, with Pluto peven being considered not a planet. In the 20 century we believed there were 9 planets but now there is considered to be 8. Science exists as it is but as humans we are constantly discovering more of it because of improvement in the times and technology. Science that proves to be accurate will never be discredited though it will be improved upon .
Answer:
The main functions of the integumentary system is to protect the body from outside environment. It includes skin, nails, nerves and hair. Skeletal system is made of bones which provides shape and support to the body.
Explanation:
Homeostasis refers to the balance or equilibrium condition of the body. If the homeostasis of the body is disturbed, the body will not be able to perform properly. For example, heat is produced in the body during energy production. If this heat is not removed from the body, the cells and organs performance is badly affected because they require optimum temperature for functioning.
Answer:
B
Explanation:
first it attaches to the host cell membrane
The molecules that contain instructions for building proteins are <em>B.) DNA molecules</em><em />
DNA consists of molecules called nucloetides. Each nucleotide contains a phosphate group, sugar group, and nitrogen base. There are four bases: cytosine (C), thymine (T), adenine (A), and guanine (G). The order of these bases is what determines the genetic code, or DNA instructions.
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