Before there was any life on earth, which gas was absent from earth's ancient atmosphere?

A. nitrogen

B. ammonia

C. oxygen

D. methane

If you are viewing bacteria with the microscope and use the 40x objective, what is the actual magnification you are viewing the specimen at?

Why is it important that a drop of condensate be suspended from the thermometer during a distillation?

Describe the three types of genomic instability?

What type of organic molecule is an enzyme

You are given a prepared slide and are told that it is a streptobacillus. Without even looking at the slide under the microscope, you know which of the following? 1. The bacteria are linked together in chains. 2. The bacteria are spherical in shape.

What are two important things we use gymnosperms for?

What are some examples of comparative anatomy as evidence of evolution?

A group of students is counting the number of plastic bags placed in a landfill during a single day. what are the students doing? A. starting a promblem b. drawing a conclusion c. making a hypothesis d. collecting data by the way this is ecology!

I need some one to rewrite this paragraph (in the comments) to make better sense im currently writing another one atm and this one is due

What following organisms is considered to be an exception to the cell theory