Match each description of the types of mechanical weathering to the correct term. 1.rocks tumble and collide with one another in a flowing stream1

2.water gets into cracks of rocks and expands as it freezes

3.the release of pressure causes sheets of rock to peel away

a.
exfoliation

b.
ice wedging

c.
abrasion

Neelaredoxin is a 15-kda protein that is a gene product common in anaerobic prokaryotes. it has superoxide-scavenging activity, and it is constitutively expressed. in addition, its expression is not further induced during its exposure to o2 or h2o2 (silva, g., et al. 2001. j. bacteriol. 183: 4413–4420). which of the following statements best describes neelaredoxin synthesis? a-neelaredoxin is produced at all times; levels are constant even when exposed to o2 or h2o2.b-neelaredoxin is produced at all times; exposure to o2 or h2o2 increases expression. c-neelaredoxin is produced at all times; exposure to o2 or h2o2 decreases or prevents expression. d-neelaredoxin is only produced when there is exposure to o2 or h2o2.

Describe two recent or ongoing space missions.

What will happen if two of the base pairs of the stand of the dna are switched