Answer:
C. away from the area where it is more concentrated.
Explanation:
If a molecule is moving across a cell membrane w/o using the cell's energy, it is diffusion, which is defined as the movement of a substance from higher to lower concentration. Diffusion <em>never </em>requires energy, whether it is facilitated or not, as clustered molecules and/or atoms simply want to get the heck away from each other if in too high concentration in a single place. The type of molecular movement across a cell membrane that would require the cell's energy would be active transport, which often requires ATP or GTP and works against a concentration gradient.
Cheers.
Answer:
b. founder effect
Explanation:
When there is a situation when sufficient number of members of one species are reproductively isolated, and if there is an evolutionary pressure for them to start developing new advantageous traits, then a new species will gradually emerge. In this kind of scenario the genetic diversity will be minimized, as the number of individuals is much smaller, and that will result in only changes that will go in only one direction and they will also occur quicker than if there was a greater genetic diversity. This is called the founder effect, and it is easy to see why this term has been chosen, as the limited number of members of a species that have been reproductively isolated are giving the foundation for the development of a new, separate species.
Answer:
1:to allow movement of small molecules in and out of cell
2
Answer:
32.1 percent
The recycling rate (including composting) was 32.1 percent in 2018, down from 34.7 percent in 2015. The per capita rates in 2018 were: 1.16 pounds per person per day for recycling.
Explanation:
Answer:
Tropical birds are often brightly colored and have long bills. They're omnivores that eat seeds, nuts, fruit and insects. Some tropical birds eat small lizards and animals. Parakeets also belong to exotic and tropical birds.
