Answer:A
Explanation:
because optimistic people are confident about their future
UV light could change the DNA of the skin cells of the organism, possibly causing cancer cells to form.
Answer:
Major difference between active transport and facilitated difusion is:
Active transport moves substances against the concentration gradient.
Facilitated diffusion moves molecules through the plasma membrane.
Explanation:
- Active transport involves the transport of molecules against the concentration gradient.
- Since molecules move from lower concentration to higher concentration this mode of transport needs energy.
- Facilitated diffusion do not require energy but need some other molecule or carrier protein to transport the molecules across the membranes.
- In facilitated diffusion, the molecules move from their region of higher concentration to the region of lower concentration.
Cryptzoology is not considered a science, because some don't take it seriously, and scientists do not have a perfect explanation for it. So it is considered a psuedoscience.
