Answer:
1.B. Yes, water is able to pass across the membrane through the aquaporins
2.A. Neither NaCl nor water can move across the cell membranes.
C:<span>Cellulose is the primary structural carbohydrate found in plant cell walls. Only a few animals have a limited ability to digest cellulose. However, </span>the fiber in the structural carbohydrates stimulates the animals' digestive systems<span>, so stools stay softer and move more quickly through the intestinal tract. This helps to prevent constipation and encourages regular defecation.</span>
One example: The improvement in science and technology over the years has decreased the infant mortality rate. Since more babies live, we have a higher population.
Also, with increases in science and technology, there are many diseases that were once considered fatal that are now easily treated. This has also led to a higher population.
