Answer:
The Retina
Explanation:
The photoreceptors lie at the back of the retina
They need water,light, and carbon dioxide
All you need to look through the human body systems you had in the unit and explain how they make you living, rather than dead. What body systems do you have that make you a living human being.
1. Your Cardiovascular system. It keeps your body and cells supplied with oxygen so they can stay alive.
2. Your nervous system. It allows your body to take outside stimuli and allow your brain to process and react to it.
3. Your Digestive system. It allows you to extract the energy from other living things and use it to power your body.
<span>A gamete needs only half the number of chromosomes because two gametes join together hope his helps you
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