The independent variable is a variable that can be stood alone. So therefore, the independent variable would be how long it takes to parachute.
Answer: D. Keratin
Explanation: Keratinocytes (pronounced: ker-uh-TIH-no-sites) make keratin, a type of protein that's a basic component of hair, skin, and nails. Keratin in the skin's outer layer helps create a protective barrier.
This is likely a mutant mouse (as synaptic clefts are typically 10 to 20 nm wide). Given that neurotransmitters act over short distances, this mouse may demonstrate delayed responses to stimuli, or no responses at all.
That’s the answer
Deoxyribose is the sugar found in DNA.
DNA is Deoxyribo-Nuclei-Acid