What is one example of urban efficiency.

A. Gridlock

B. Bright lights

C. A subway system

D. The highway system

Does mitosis or meiosis make reproductive cells?

Make a claim that answers the scientific question

What instrument is used to spin liquids to separate components

explain how repressible and inducible operons differ and how those differences reflect differences in the pathways they control

Events involving a disk-shaped nebula occurred before the nuclear fusion that led to the birth of the solar system. Which two statements about the disk-shaped nebula are true? Gravity caused the disk-shaped nebula to shrink.

In some proteins, the side chain of serine appears to undergo ionization. explain why ionization would be facilitated by the presence of an aspartate residue nearby.

Define and explain the term scientific theory

The table below shows the number of the sub-atomic particles in an atom of nitrogen. Sub-atomic Particles Sub-atomic Particle Number Protons 7 Neutrons 7 Electrons 7 What is the amu of a nitrogen atom?

The ions in a compound form and orderly three-dimensional arrangement called a molecule. true or false

How would a scientist study the relationship between the Tiktaalik roseae and modern fish and tetrapods? create a diagram that hypothesizes ancestry use relative dating use transitional fossils to determine age review its analogous structures