Answer:
DIFFUSION
Explanation:
Water, carbon dioxide, and oxygen are among the few simple molecules that can cross the cell membrane by diffusion (or a type of diffusion known as osmosis ). Diffusion is one principle method of movement of substances within cells, as well as the method for essential small molecules to cross the cell membrane.
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.
Answer:
extended period of 3mos. or more
Explanation:
chronic diseases such as diabetes, means u will have this disease 4 the rest of your life. whereas, acute, means temporary, corrected by antibiotic meds.
2 strands of DNA=hydrogen bonds
2water molecules=polar convalent bonds
NACL=ionic bond
H2=ionic
Answer:
Okiii!
Explanation:
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