Answer:
examples include, "FF" or "DD", or just two uppercase letters.
Explanation:
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.
Answer:
Fertilized ovules grow into seeds
Some require heat for seed dispersal
Male and female cones may grow on the same plant
Explanation:
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Answer:
A
Explanation:
Logically, the cell would have two nuclei because karyokinesis (the division of the nucleus) occurs before cytokinesis (division of the cytoplasm).
