Fill in the blank as shown below. monarch butterflies cannot fly if their body temperature is less than degrees celsius.

Which property is used to identify the origin of an igneous rock? color density hardness crystal size

Glutamic acid: hydrophilic or hydrophobic? positive, negative, or neutral? valine: hydrophilic or hydrophobic? positive, negative, or neutral?

Which events are likely to be catastrophic to an ecosystem? select the three correct answers.a-hurricane.b-steady population growth.c-seasonal flooding.d-introducing of an aggressive invasive species.e-tsunami.