What is the one defining characteristic of a prokaryotic cell? Organelles have no membranes Cytoplasm fills the cell Cell contains DNA Ribosomes make protein

Which of the following variables present in Redi's experiment concerning spontaneous generation is the independent variable

During protein synthesis, the start codon for Initation phase in eukaryotes always starts with AUG which codes for which of the following?

Where is the volcanic arc located? A. on the oceanic plate B. on the boundary between the oceanic and continental plates C. on the continental plate D. partly on the continental plate and partly on the oceanic plate

A pregnant mouse is exposed to high levels of a chemical. Many of the mice in her litter are deformed, but when they are interbred with each other, all their offspring are normal.

What will happen if the vascular tissue of a plant does not form? a. the roots of the plant will be responsible for photosynthesis. b. the plant will keep its photosynthetic location close to its roots. c.

A victim of a physical assault who relives the event repeatedly in his or her mind may be suffering from

How has global temperature changed over the last 1000 years

What factors determine soil consistence?

What are the levels or organization in biology?

In what grade do you take biology I took it in 6th grade, just wondering