Which factor causes gas and dust to pull together during the first stage of star formation?

density

gravity (I chose this)

heat

pressure

Which bacterial infection is effectively treated by both tigecycline (tygacil) and minocycline (minocin) ?

A certain regulatory gene is involved in controlling the expression of other genes. In studying this regulatory gene, a scientist discovers that it encodes for an enzyme that causes histone deacetylase (the removal of acetyl groups from histone

After the strawberry mess is filtered out you are left with two layers which best describes the location of the DNA. A. Suspended in the clear liquid B. Floating on the top C. At the bottom of the pinkish liquid D. Suspended in the pink liquid

Which of the following body parts is associated with the greatest amount of brain tissue in the somatosensory cortex? neck toes lips knees

In which phylum would you find plants that are closest to the flowering plants, strange group of plants that even undergo the same double fertilization as the flowering plants.

What is unique about the water near Antarctica? How does it drive global ocean circulation?

A physician examines a patient who complains of breathing problems. She finds fluctuations in the patient's blood pressure and heart rate. The physician thinks it's because of a brain injury. Which part of the brain is affected? A. Cerebellum B.

In natural selection what determines which color grey or green is advantageous

How does the population growth rate affect how long Earth's coal supply will last? A. The coal supply lasts the longest when the population growth rate is high. B. The coal supply is used up the slowest when the population growth rate is average. C.

Within which structure does the placenta normally develop