A common dna structural feature involved in gene regulatory systems is

a. supercoiling of dna.

b. looping of the dna.

c. unwinding of the double helix.

d. coiling into z-dna.

e. double-strand breakage of dna

Which group of organisms is most closely related to Archeabacteria? A) Animalia B) Fungi C) Plantae D) Eubacteria

When a horizontally positioned plant responds to gravity, auxins in the lower sides of stems cause cell elongation that bends the stem upright. the shoot bends to grow downward, toward the force of gravity.

Which part of the tree produces the maple syrup and from which part of the tree is the sap tapped?

What makes a fossil an index fossil

What kinds of evidence and scientific techniques could the biologists use to determine the evolutionary relationship of the cloudrunner to other animals?

A sonic boom is produced by a jet. What can you determine about the jet's motion? a) It is near a mountain where echos can be produced b) Its engines produced backfire c) It is increasing in altitude d) It is traveling faster than the speed of

What happens when someone dies?

As the mass of an object increases, so does its gravitational force. true or false

Suppose you wanted to determine whether you had adequately sampled the species richness of a given amphibian community.

Do you guys know of any plants that would be easy to write a 400 word essay on?