If the sugar concentration in a cell is 4% and the concentration in the cell's environment is 2%, how can the cell obtain more sugar?
A. Sugar can diffuse straight through the phospholipid bilayer.
B. Sugar can undergo facilitated diffusion through a channel protein and no
energy is required.
C. The cell CANNOT obtain any more sugar. It is doomed,
D. The cell must use active transport to pump the sugar in. Energy is
required.

It is believed that europa, one of jupiter’s moons has an ocean beneath its surface. based on how earth’s oceans and atmosphere are believed to have formed, what can be said about europa’s supposed ocean? the arrival of in the early days of europa’s existence could have formed its ocean. it is likely that the water experienced , similar to earth. it is also possible that this water is retained beneath europa’s surface and in its atmosphere due to europa’s .

Indicate the coat color and the proportion of offspring with that color for each of the following crosses of rabbits. assume all are homozygous. albino x albino a) 1/4 chinchilla, 3/4, agouti b) 3/4 albino, 1/4 chinchilla c) all albino

The wings of insects, birds, and bats evolved independently but carry out similar functions. this is an example of a. analogous structures. b. embryonic structures. c. vestigial structures. d. homologous structures.