Just like other cells, the part of the bacterium that is able to interact with its outside environment is its cell membrane. Generally, the main function of the cell membrane is for barrier and protection. This decides which molecules will be allowed to permeate or not. Hope this helps.
Characteristics of Living Creatures
1. Move
2. Eat
3. Sensitive to Stimuli
4. Breathe
5. Grow
6. Dispose of Waste
7. Reproduction
8. Adapt
One of the difference is that the ice cube is solid and gas is not.
I believe the answer is 172,800,000,000 per day (24 hours)
How I Got That Answer:
I calculated 2 million times 60
=120000000 per minute
Then I calculated that times 60 again
=7200000000 per hour
Then I calculated that times 24
=172800000000 per day
The right answer is c. 3 to 10 million
The latest estimates are a bit more precise: there are 8.7 million living species (which is included in the range between 3 and 10 million), 6.5 million on land and 2.2 million in the water. Which is amazing, since there is more sea than land on our planet.
Researchers estimate that there are 7.77 million animal species, only 298,000 plant species and 611,000 species of fungi and molds.
