Write a short note on open type of circulatory system?​

Some mining processes involve removal of large areas of earths surface in the mined region this practice causes severe environmental damage by allowing which natural process to accelerate in the affected areas? a. precipitation b. erosion c. migration d. condensation

What is the compliment dna strand to the following sequence: ttgactaggcta

Which worm has eyespots that are used to detect light? a fluke b marine worm c planarian d tapeworm