complex organisms reproduce sexually and simple organisms reproduce asexually is this statement always true

No, this statement is not always true. While it is generally true that more complex organisms tend to reproduce sexually and simpler organisms tend to reproduce asexually, there are exceptions to this rule. Some complex organisms, such as certain species of plants, fungi, and animals, can reproduce asexually through methods like vegetative propagation or fragmentation. Similarly, some simple organisms, like certain bacteria and archaea, have the ability to exchange genetic material through a process called horizontal gene transfer, which can be considered a form of "sexual" reproduction. So, while the statement holds true in many cases, it is not universally applicable.