1 1.2.2 Quiz: Themes in Biology
Question 3 of 10
Which is a result of a seasonal change?

1. Closer to the North Pole and the South Pole, daylight and temperatures change with the seasons. Days are longer and temperatures are colder in summer than in winter. ... People often think that the Earth is closer to the Sun during the summer. And it's farther away during the winter.

2. Seasonal changes in precipitation and

temperature affect soil moisture, evaporation rates, river flows, lake levels, and snow cover. Leaves fall and plants wither as cold and dry seasons approach;these changes in vegetation affect the type and amount of food available for humans and other organisms.

the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.

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.