Why is it hard to say whether viruses are alive or not

Which of the following can upset the balance of an ecosystem? too much water not enough water too much light not enough light all of the above none of the above

Anytime we speculate about a problem and think of an answer based on what we see on TV or read on the Internet, we are forming a scientific theory. True or False?

If horizontal layers of sedimentary rock have a vertical fault running through them how might a geologist use relative dating to determine when the fault occurred

How did you determine if the evidence had a causal or correlation relationship to the species survival

Interdisciplinary nature of biology

Which statement describes a situation that would reduce the stability of a forest ecosystem? (1) A fierce predator is removed from the ecosystem. (2) The number of producers remains constant in the ecosystem.

A scientist is studying a region of an ocean floor she discovers a long deep canyon that runs parallel to the coastline of a nearby continent what can she inferred from her discovery

Anson is 75 years old and has recently been experiencing a change in his personality. He is acting more impulsively and does not seem to care about his loved ones, to whom he has always been very devoted.

What is the best explanation if the gel of your PCR product shows smeared bands of multiple sizes? Select one: a. Non-specific gene amplification b. Primers hybridizing with one another c. Your isolate was not from a single bacterial colony d.

Explain how the circulatory system of cephalopods is different from that of other mollusks