Answer:
Arteries carry oxygenated blood away from the heart. Veins carry the blood back to the heart. Veins contain valves that ensure blood flows in only one direction. Arteries don’t require valves because pressure from the heart is so strong that blood is only able to flow in one direction.
Explanation:
Answer: population density
Explanation:
Without seeing the image ...I can suggest C as bacteria and archae are the most similar besides all other options ! am I right !!!
Answer:
The moon
Explanation:
Most nocturnal plants, animals and insects, like moths, use the moon as their guide through the night. This is why insects are attracted to light in the nights
