Jon is researching the oxygenation of Earth's atmosphere. Which unicellular organism do biologists consider to be the main contributor to that process?

A. paramecia

B. amoebae

C. dinoflagellate

D. cyanobacteria

Answer is D. cyanobacteria

What is a controlled experiment

The Mohs scale is used to determine a mineral's

Find the volume of 20.0g of beneze?

Describe briefly the structure and function of spinal cord?

Phrenology suggested that by seeing or feeling a person's skull, we could have insight into their personality and which characteristics were over or under developed. 1) True 2) False

Name 2 ways the diffusion of popular customs can adversely affect the environment

Once your ambulance is dispatched to an emergency, you have an obligation to respond. what is this called?

Which of the following cellular adaptations assist many unicellular organisms with locomotion? A. Mitochondria B. Chloroplasts C. Cilia D. Ribosomes

When an accurate experiment is repeated by another scientist, the results A) should be similar to those obtained originally. B) will be identical every time the experiment is repeated. C) should be completely different for a different scientist.

1. Which of the following forms all matter?