If a scientist is observing biotic and abiotic factors, which of the following level of organism must she be studying?

A. An ecosystem

B. A population

C. A community

D. An individual organism

Why might genetically engineering a crop to be herbicide resistant result in producing weeds that are herbicide resistant?

Which biome is found near the polar ice caps? coniferous forest tundra tropical rainforest taiga

An orange roughy fish eats squid and small fish. It also is eaten by predators like dolphins and sharks. Where would the orange roughy most likely appear on a food web? A. It is a primary producer because it provides food for the dolphins and sharks.

Which one of the following would be a good tool to represent data in terms of percentage of a whole?

What is the difference between longitudinal cross transverse and horizontal cuts?

What is the reference between relative dating and absolute dating

An amoeba is a unicellular organism, which doesn't have a stomach for digestion of food. How does food storage and digestion take place in an amoeba?

Select all of the answers that apply. What major factors affected earth's changing climates?

How does mimicry influence the behavior of predators?

The surface of a bone that articulates with another bone (forming a joint) is covered with