* Research two organisms that are affected by temperature or salinity (or both). Several websites are listed below.
* Describe what their tolerable range in temperature/salinity is, how they try to cope or adapt to changes, and what is happening to them now.
* List any conservation methods being used to try and help them, and two things that we can do to try and help the situation.

humans are now responsible for causing changes in the environment that hurt animals and plant species. we take up more space on earth for our homes and cities. we pollute habitats. human activity often changes or destroys the habitats that plants and animals need to survive.

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.