How many copies of the 1st chromosome does a human diploid cell contain

Explain why crops in the Arctic grow larger than normal during the summer months.

In a certain breed of plants, dark green is determined by the dominant gene 'G' and light green is determined by the recessive gene 'g'. The heterozygotes show a 75% penetrance.

Why do mountain climbers carry oxygen?

What is the main factor that causes bedrock to weather at different rates? 1. Elevation above sea level 2. Mineral composition 3. Age of rock layers 4. Environmental factors

Places where mountain ranges are being formed, such as the Himalayas, indicate areas where tectonic plates are pushing into each other, providing evidence for plate tectonic activity. True False

Karina has an inflammatory disease of her gastrointestinal tract that causes her to experience cramps, joint pain, and diarrhea. her diagnosis is

What is the electrical pathway of the heart, in order? NOTE - this includes pacemaker and conduction components.

A person has a bone fracture and takes a painkiller that causes blood-vessel constriction. Why might this painkiller actually slow bone healing? Specifically describe how the drug would affect the three stages of bone healing.

Proteins in the plasma membrane: A. may act in cell-to-cell recognition B. may serve as carriers C. may serve as hormone receptors D. all of these

Where do rift valleys occur