An important example of a "positive feedback loop" in the polar climate system is:
a. Scientists in remote places check on each others instruments.
b. Warming ocean water opens new areas for marine species.
c. Warmer winters cause more plant growth, providing more food.
d. Sea ice melt opens more ocean to sunlight, causing more melt.

The wings of insects, birds, and bats evolved independently but carry out similar functions. this is an example of a. analogous structures. b. embryonic structures. c. vestigial structures. d. homologous structures.

Which statements best describe the differences or similarities between a comparative investigation and an experimental investigation? check all that apply. experimental investigations are best for showing cause-and-effect relationships, while comparative investigations do not necessarily show this type of relationship. comparative investigations are often impractical and unrealistic, while experimental investigations are the most practical and realistic kinds of investigations. comparative investigations allow for the use of a wide range of variables but do not have a control group, while experimental investigations involve variables that can be controlled. both experimental investigations and comparative investigations are designed to answer scientific questions. both experimental investigations and comparative investigations focus on making observations rather than collecting new data.

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