I believe your answer is C
Just check if it has all the characteristics of life.
1. Is it made of cells?
2. Does it metabolize?
3. Does it keep internal conditions stable? (Homeostasis)
4. Does it have organs?
5. Can it reproduce?
6. Does it grow/develope?
7. And does it respond to stimuli (poke a bug, it moves. flower grows towards the sun.)
If all of these are Yes, your specimen is in fact, living.
Answer:
i imagine them as peopel in a big city, or animals in the wild with predators that are hungry, the cell uses the ribosomes for food and to heal the cell with energy.
Explanation:
The valves are responsible for preventing blood from flowing in the wrong direction, they are present in the veins, and the arteries don't need them because the aorta (biggest artery) pumps or in other words pushes it with such a force that no other force can change its direction, in the veins there is no structure present for pumping them as a result we have got valves so that they go in one direction...... the meaning of the word valve is to allow in one direction
