Which of the following is the largest ?

TLS Online TPP Program

#Question id: 142

#Unit 1. Molecules and their Interaction Relevant to Biology

Histidine has pKa values of 1.8, 6.0 (R-group) and 9.3 . At pH 8.0, the net charge on histidine is

TLS Online TPP Program

#Question id: 10509

#Unit 6. System Physiology – Plant

A different type of mechanical obstacle to herbivory is provided by mineral crystals that are present in many plant species, such as silica crystals known as

TLS Online TPP Program

#Question id: 18369

#Unit 12. Applied Biology

The chemical and breakdown products of herbicide DDT cause eggshell thinning and population declines in multiple North American and European bird of prey. They are remediated by 

TLS Online TPP Program

#Question id: 19274

#Unit 9. Diversity of Life Forms

Arrange the following in the correct sequence, from earliest to most recent, in which these plant traits originated: 

1. sporophyte dominance, gametophyte independence 

2. sporophyte dominance, gametophyte dependence 

3. gametophyte dominance, sporophyte dependence 

TLS Online TPP Program

#Question id: 4580

#Unit 11. Evolution and Behavior

In modern terminology, diversity is understood to be a result of genetic variation. Sources of variation for evolution include all of the following except