Alpha Centauri d is the sure fire answer
Answer:
John accidentally put his hand on a burning stove and immediately drew it back, yet still he is experiencing pain.
In this sentence, stimulus will be a hand touching fire of the stove. External response will be moving of the hand from the stove immediately.
A stimulus can be described as any physical or chemical change which elicits a response form a living organism. The stimulus is detected as a signal and response is generated in accordance to the signal.
Answer:
The force of spring will be "3.75 N". The further explanation is given below.
Explanation:
The given values are:
Spring constant, K = 75.0 N/m
x₁ = 0.200 m
x₂ = 0.150 m
So that,
⇒ 
⇒ 
⇒ 
Now,
Force of spring will be:
⇒ 
On putting the estimated values, we get
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Answer:
3. An Apple Turning Brown
Explanation:
When an apple is cut (or bruised), oxygen is introduced into the injured plant tissue. When oxygen is present in cells, polyphenol oxidase (PPO) enzymes in the chloroplasts rapidly oxidize phenolic compounds naturally present in the apple tissues to o-quinones, colorless precursors to brown-colored secondary products.
Answer:
Protects your body against foreign invaders: The lymphatic system is part of the immune system. It produces and releases lymphocytes (white blood cells) and other immune cells that monitor and then destroy the foreign invaders — such as bacteria, viruses, parasites and fungi — that may enter your body.
