Medical professionals are concerned with the
increase in the number of bacterial species that
are resistant to antibiotics. once resistance
appears in a bacterial population, it spreads
rapidly. this is most likely because
(1) populations of resistant bacteria are small
(2) exposure to antibiotics increases the rate of
reproduction in bacteria
(3) resistant bacteria are small when compared
to non-resistant bacteria.
(4) resistant bacteria survive in greater numbers
and pass the trait to their offspring

glacial erosion, the picking up and movement of earth beneath a glacier, is also referred to as plucking. erosion and transportation of individual pieces of bedrock, especially large "joint block occur as a result of this glacial erosion. plucking is type of erosion in which rocks become frozen into the bottom and sides of the glacier.as the glacier moves downhill it 'plucks' the rocks frozen into the glacier from the ground.

answer: the correct option is d. enzyme

lactase and carbonic anhydrase are the examples of enzymes.

lactase is an enzyme, which is present in the small intestine of mammals. it in the digestion of the disaccharide, lactose ( milk sugar) by converting it into two monosachharide, which are glucose and galactose.

carbonic anhydrase is present in the red blood cells. this enzyme plays significant role in the transport of co₂. it in the conversion of co₂ and h₂o into carbonic acid, which is then dissociated into bicarbonate ions and hydrogen ions.