Answer:
Cardiovascular is the correct option
The answer is hydrogen bond.
Between water molecules, hydrogen bonds can be seen, which is due to the polar nature of water.
Answer: It's not blocked
https://www.khanacademy.org/science/high-school-biology/hs-human-body-systems/hs-body-structure-and-homeostasis/a/tissues-organs-organ-systems
<em>1. sólido, líquido, gas, plasma</em>
<em>2. volumen, solubilidad, presión de vapor, color o conductividad eléctrica.</em>
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<em>cómo ha sido su día? :)</em>
In plants the reproductive structure that produces pollen and seeds is the xylem is the answer