Checkpoint: plant skin, plant support and blood
Three ideas from the last lessons. Retry any time.
Which part of the epidermis reaches into soil for water?
What do stomata let pass?
A cell has thick walls full of lignin. Many such cells are dead. Which tissue is it?
A young stem bends without breaking. Its cells are living, with thick corners. Which tissue?
A small cut stops bleeding after a while. Which part of blood helps the blood clot?
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