Answer:
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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.
Sunlight help to provide energy to the plant to complete the process. Basically, the plant harvest the solar energy.
The answer is C.
Chromosome are dark staining structures in a cell nucleus on which the organism genes (DNA Molecules) are arranged, -I.e Chromosome are the carriers of genes
Answer:
Explanation:
Wild guess. Photosynthesis
