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(1) 4500 ÷ 0.45% =1000000 (species)

There are 1000000 species of insects.

(2)56×24%= 13.44 (kg)

56× 30% =16.8kg.

56×15% = 8.4kg.

56×13% = 7.28kg.

56× 18%= 10.08 (kg)

Answer: tomatoes 13.44 kg, vegetables 16.8 kg, beans 8.4 kg, peppers 7.28 kg, cucumbers 10.08 kg.