Answer:
Technology because we don't have the necessary technology to explore the parts of space and for all we know we don't even know what the universe actual looks like or if there are alternate universes but as technology advances we will know. Explanation:
The answer is low light intensity! I hope this helps!
Animal’s and Plant's circulatory system:
1. Animals have circulatory system for the transport of nutrients and waste and plants have vascular system for the exchange of gases and nutrient.
2. Animals have specialized circulatory systems like.ARTERIES,VEINS and CAPILLARIES.
3. IN PLANTS, they have bidirectional transport system…like FOOD prepared though PHOTOSYNTHESIS is transported to different parts of plant body through phloem..while minerals and water intake by roots r transported by xylem..
4. ANIMALS circulatory system works on presence of amount of blood.
5. PLANTS circulatory system works on availability OF resources.
