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The answer is: 3 tennis balls because there will be 4 ping pong balls used for every model and 12/4=3

Explanation:

Here ya go!

Explanation:

You would need only 2 tennis ball to complete the model. By splitting each tennis ball in half you will now have 4 parts. I have already glued the 12 ping pong ball together in a circular shape. I would then just glue the parts of the tennis balls on the ping pong mass is reference to the picture shown.

a

explanation:

many plants naturally reproduce this way, but it can also be induced artificially. horticulturalists have developed asexual propagation techniques that use vegetative plant parts to replicate plants. success rates and difficulty of propagation vary greatly. monocotyledons typically lack a vascular cambium and therefore are harder to propagate.

if your own plato the answer is b. the fern transitioned from sporophyte generation to gametophyte generation.