Humans can cause an ecosystem to collapse by: a. collecting and chemically altering industrial waste to detoxify it. b. reducing habitat fragmentation. c. hunting a keystone species to extinction. d. building shelter belts next to farm fields.

i think its control and coordinate because im pretty sure thats what tissue does and the joints are what control movement and then your skeletal/ bones provides portection. hope that .

that scientist would be robert hooke

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.

it is a limiting nutrient limited by a single nutrient in the ecosystem, & the single goes very slow.