During DNA replication, what is the first process to occur?

a:zipping up of the DNA strand for copying

b:synthesis of the leading strand

c:synthesis of the lagging strand

d:unwinding of the parental DNA by helicase enzyme

mary's friend observes the investigation and claims that block b has more more mass. if there was no errors in this investigation, which of the following must be true for this claim to be correct

All the processes that form mountains ranges are know as?

You are towing a skier behind your boat which of these is a safety precaution you should take

A crew tries to keep a sailing ship on course despite all the changes in the sea and in the weather. How is the crew like the internal control systems in the human body?

How are genetic drift and gene flow similar

1) which structure regulates breathing rate in humans? A) diaphragm B) lungs C) hypothalamus D) medulla 2) the first forms of life on earth A) appeared about 10,000 years ago B) could easily maintain a stable internal environment C) were

What is a chemical transmitter?

How do groups of organs assemble and work together to make an organism? A. they form other organs B. they form group of cells C. They form organ systems D. They form an ecosystem

What substance is analogous to a factory manager?

What can you conclude about fossil by looking at the layers of rock?