Answer:
D.
Explanation:
Solar energy is needed for photosynthesis, and chemical energy in the form of glucose is needed for cellular respiration.
Explanation:
d. when the growth rate is at its highest
Answer:
If sunspots are active, more solar flares will result creating an increase in geomagnetic storm activity for Earth. Therefore during sunspot maximums, the Earth will see an increase in the Northern and Southern Lights and a possible disruption in radio transmissions and power grids.
Yes, there is growing evidence that cognitive impairment is associated with cigarette smoking.
The right answer is vein (it contains blood and has valves).
The infra-cardiac veins of small and medium caliber possess this system of fight against gravity. The valves consist of a dense connective tissue, surmounted by endothelial cells, corresponding to a fold of the intima. They allow blood circulation in the sense organ / heart but prevent venous reflux.
