Abiologist discovered a young, four-legged animal. the animal had lungs, seemed to fertilize internally, and its outer surface was covered with scales. in which class of animals is the biologist likely to place the animal?

What is the sequence of amino acids corresponds with the rna strand ucg ggg cac

The blue particles in this image are able to cross the cell membrane through simple diffusion. how will they be transported? outside the cell inside the cell o a. the substances will move directly across the membrane from outside the cell to inside the cell. b. the substances will move through channels in the membrane proteins from outside the cell to inside the cell. o c. the substances will move through channels in the membrane proteins from inside the cell to outside the cell. o d. the substances will move directly across the membrane from inside the cell to outside the cell.

18. over time, how do sand dunes tend to migrate? a. perpendicular to the movement of the wind b. in the same direction as the wind blows c. toward the wind d. in random directions