Cyanobacteria are most responsible for ...

A) creating multicellular organisms

B) oxygenating the Earth

C) creating archea

D) creating carbon dioxide

List and describe the most important erosional and depositional features of a river and how these features form.

What is the source of all animal energy of the earth

Steps in the repair of a bone fracture include (1) bone deposition by osteoblasts, (2) bone and debris removal by osteoclasts, (3) hematoma, and (4) formation of a fibrocartilage callus. in what order do these steps occur?

Write a claim in response to the following question:Why did the beef and peanuts have significantly higher amounts of chemical energy (Calories) than the plant-based foods even though they all had the Same mass.

In cats, black fur color is caused by an X-linked allele; the other allele at this locus causes orange color. The heterozygote is tortoiseshell. What kinds of offspring would you expect from the cross of a black female and an orange male? A.

Suppose a large number of dead fish are found floating in a lake. how would you determine whether they died from cultural eutrophication or from exposure to toxic chemicals?

Which best explains how gravity contributes to the formation of layers in protoplanets? Gravity attracts materials and causes compaction, which produces heat and leads to the melting, sinking, and rising of materials.

1. As an object moves towards another object the sound waves bunch up. True Or False 2. As an object moves toward another object the sound waves have lower frequency. True or False. 3.

Do we classify viruses as living

What caused the evolution of antibiotic-resistant bacteria?