Which of the following pieces of evidence most strongly supports the common origin of all life on Earth?

#Question id: 4362

#Unit 3. Fundamental Processes

How are bacteria able to change their patterns of protein synthesis so quickly in response to environmental changes?

#Question id: 10973

#Unit 7. System Physiology – Animal

An 11-year-old premenstrual female presents with a painful knee after mild trauma. Upon further evaluation you observe soft tissue bruises. The child is an orphan and there is no family history. The foster mother reports no other problems. The aPTT is prolonged and the PT is normal. A complete hematologic workup would yield

#Question id: 12219

#Unit 7. System Physiology – Animal

#Question id: 3286

#Unit 11. Evolution and Behavior

 In a human population, the gene frequencies of the alleles for the ABO system are as follows:

A = 29%                         B = 7%                                    0=64%

Assuming complete random mating and Hardy-Weinberg equilibrium,

What are the blood type A frequencies in this population?

#Question id: 4390

#Unit 3. Fundamental Processes

Epigenetics marks refer to modifications to DNA and proteins that in turn regulate gene expression. Which statement is true regarding these specific types of modifications?